CN114615115A - Method, apparatus, device, medium and program product for determining channel impulse response - Google Patents
Method, apparatus, device, medium and program product for determining channel impulse response Download PDFInfo
- Publication number
- CN114615115A CN114615115A CN202210264039.9A CN202210264039A CN114615115A CN 114615115 A CN114615115 A CN 114615115A CN 202210264039 A CN202210264039 A CN 202210264039A CN 114615115 A CN114615115 A CN 114615115A
- Authority
- CN
- China
- Prior art keywords
- path
- phase offset
- frequency domain
- channel
- impulse response
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000004044 response Effects 0.000 title claims abstract description 101
- 238000000034 method Methods 0.000 title claims abstract description 62
- 238000004590 computer program Methods 0.000 claims description 33
- 230000010363 phase shift Effects 0.000 claims description 28
- 230000002194 synthesizing effect Effects 0.000 claims description 17
- 125000004122 cyclic group Chemical group 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 238000005388 cross polarization Methods 0.000 claims description 8
- 238000005562 fading Methods 0.000 claims description 8
- 238000004891 communication Methods 0.000 abstract description 37
- 238000005516 engineering process Methods 0.000 abstract description 24
- 238000011156 evaluation Methods 0.000 abstract description 15
- 108091006146 Channels Proteins 0.000 description 217
- 238000010586 diagram Methods 0.000 description 14
- 238000012545 processing Methods 0.000 description 14
- 238000005259 measurement Methods 0.000 description 9
- 238000004088 simulation Methods 0.000 description 8
- 230000006735 deficit Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 238000003786 synthesis reaction Methods 0.000 description 4
- 230000009466 transformation Effects 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000209094 Oryza Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 235000003642 hunger Nutrition 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0212—Channel estimation of impulse response
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/24—Testing correct operation
- H04L1/248—Distortion measuring systems
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Noise Elimination (AREA)
- Radio Transmission System (AREA)
Abstract
The present application relates to a method, apparatus, device, medium and program product for determining a channel impulse response, the method comprising: acquiring parameter information of a target wireless channel; inputting the parameter information into a preset wireless channel model to obtain signal parameters of a plurality of paths; determining a phase offset sequence of each path according to the signal parameter of each path; the plurality of phase offset sequences represent phase distortions of the signals of the plurality of paths; and determining the channel impulse response of the target wireless channel according to the phase offset sequence of each path and the signal parameter of each path. By adopting the method, the problem of phase deviation of the multipath signals received by the antenna array under the multi-antenna communication technology can be added into the channel performance evaluation, so that the evaluation of the influence of hardware damage of the phase deviation of the multipath signals on the channel performance caused by the mutual influence between the receiving antennas under the multi-antenna communication technology is realized.
Description
Technical Field
The present application relates to the field of wireless communication technologies, and in particular, to a method, an apparatus, a device, a medium, and a program product for determining a channel impulse response.
Background
In order to meet the increasingly rapid communication performance requirements, advanced wireless communication technologies are continuously evolving, and in order to better evaluate the performance of the wireless communication technologies, a link-level simulation platform capable of simulating a real wireless communication channel link is required, and the related physical layer communication technologies can be more accurately researched and evaluated through the link-level simulation platform.
Due to the expansion of the communication frequency band to millimeter waves and the requirement for higher-order modulation, the performance of a communication channel can be seriously influenced by hardware damage, so that the development of a wireless communication technology is restricted. It is therefore crucial to efficiently assess the impact of hardware impairments on channel performance. At present, techniques for evaluating the influence of such hardware impairments as phase noise, carrier frequency offset, and the like on channel performance are relatively mature, but with the rapid development of multi-antenna communication techniques, phase distortion of multipath signals also becomes a hardware impairment that seriously affects channel performance, and no effective evaluation method for the influence of this type of hardware impairment on channel performance appears yet.
Therefore, how to provide a method for effectively evaluating the influence of the phase distortion of the multipath signals on the channel performance becomes a technical problem to be solved at present.
Disclosure of Invention
The present application provides a method, apparatus, device, medium, and program product for determining a channel impulse response, which can effectively evaluate the influence of phase distortion of a multipath signal on channel performance.
In a first aspect, the present application provides a method for determining a channel impulse response. The method comprises the following steps:
acquiring parameter information of a target wireless channel;
inputting the parameter information into a preset wireless channel model to obtain signal parameters of a plurality of paths;
determining a phase offset sequence of each path according to the signal parameter of each path; the plurality of phase offset sequences represent phase distortions of the signals of the plurality of paths;
and determining the channel impulse response of the target wireless channel according to the phase shift sequence of each path and the signal parameter of each path.
In one embodiment, the signal parameter for each path comprises at least one of an angle, a time delay, and a gain of each path.
In one embodiment, determining the phase offset sequence of each path according to the signal parameter of each path includes: determining the phase offset of each path according to the angle of each path; carrying out interpolation operation on each phase offset to obtain a target phase offset of each path; and performing frequency domain conversion on the target phase offset of each path to obtain a phase offset sequence of each path.
In one embodiment, determining the channel impulse response of the target wireless channel according to the phase offset sequence of each path and the signal parameter of each path comprises: synthesizing the signal parameters of each path and the phase shift sequence of each path to obtain a frequency domain shift sequence of each path; accumulating and operating the frequency domain offset sequences of all paths to obtain a channel frequency domain offset sequence; and sequentially carrying out cyclic shift, inverse Fourier transform and interception on the channel frequency domain offset sequence to obtain the channel impulse response of the target wireless channel.
In one embodiment, synthesizing the signal parameter of each path and the phase offset sequence of each path to obtain a frequency domain offset sequence of each path includes: converting the gain of each path into frequency domain gain, and converting the time delay of each path into frequency domain time delay; and synthesizing the frequency domain gain of each path, the frequency domain time delay of each path and the phase offset sequence of each path into the frequency domain offset sequence of each path.
In one embodiment, the parameter information of the target wireless channel includes: at least one of delay spread, Rice K factor, angle spread, shadow fading, cross-polarization ratio.
In a second aspect, the present application further provides a device for determining a channel impulse response. The device includes:
the acquisition module is used for acquiring parameter information of a target wireless channel;
the input module is used for inputting the parameter information into a preset wireless channel model to obtain signal parameters of a plurality of paths;
the phase offset sequence determining module is used for determining the phase offset sequence of each path according to the signal parameters of each path; the plurality of phase offset sequences represent phase distortions of the signals of the plurality of paths;
and the channel impulse response determining module is used for determining the channel impulse response of the target wireless channel according to the phase offset sequence of each path and the signal parameter of each path.
In a third aspect, the present application also provides a computer device. The computer device comprises a memory storing a computer program and a processor implementing the following steps when executing the computer program:
acquiring parameter information of a target wireless channel;
inputting the parameter information into a preset wireless channel model to obtain signal parameters of a plurality of paths;
determining a phase offset sequence of each path according to the signal parameter of each path; the plurality of phase offset sequences represent phase distortions of the signals of the plurality of paths;
and determining the channel impulse response of the target wireless channel according to the phase offset sequence of each path and the signal parameter of each path.
In a fourth aspect, the present application further provides a computer-readable storage medium. The computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of:
acquiring parameter information of a target wireless channel;
inputting the parameter information into a preset wireless channel model to obtain signal parameters of a plurality of paths;
determining a phase offset sequence of each path according to the signal parameter of each path; the plurality of phase offset sequences represent phase distortions of the signals of the plurality of paths;
and determining the channel impulse response of the target wireless channel according to the phase offset sequence of each path and the signal parameter of each path.
In a fifth aspect, the present application further provides a computer program product. The computer program product comprising a computer program which when executed by a processor performs the steps of:
acquiring parameter information of a target wireless channel;
inputting the parameter information into a preset wireless channel model to obtain signal parameters of a plurality of paths;
determining a phase offset sequence of each path according to the signal parameter of each path; the plurality of phase offset sequences represent phase distortions of the signals of the plurality of paths;
and determining the channel impulse response of the target wireless channel according to the phase offset sequence of each path and the signal parameter of each path.
The application provides a method, a device, a medium and a program product for determining a channel impulse response, which can generate multi-path signal parameters based on parameter information of a target wireless channel, then determine a phase offset sequence of each path based on the signal parameters of each path, and finally determine the channel impulse response of the target wireless channel based on the phase offset sequence of each path, wherein the phase offset sequence represents phase distortion of signals of a plurality of paths. Therefore, the channel impulse response of the wireless channel can be determined based on the phase offset sequence of each path, that is, the phase offset problem of the multipath signals received by the antenna array under the multi-antenna communication technology can be added into the channel performance evaluation, so that the evaluation of the influence of the hardware damage of the multipath signal phase offset caused by the mutual influence between the receiving antennas on the channel performance under the multi-antenna communication technology is realized.
Drawings
FIG. 1 is a diagram of an embodiment of a method for determining a channel impulse response;
FIG. 2 is a flow diagram illustrating a method for determining a channel impulse response according to one embodiment;
FIG. 3 is another flow diagram illustrating a method for determining a channel impulse response according to one embodiment;
FIG. 4 is another flow diagram illustrating a method for determining a channel impulse response according to one embodiment;
FIG. 5 is another flow diagram illustrating a method for determining a channel impulse response according to one embodiment;
FIG. 6 is another flow diagram illustrating a method for determining a channel impulse response according to one embodiment;
FIG. 7 is another flow diagram illustrating a method for determining a channel impulse response according to one embodiment;
fig. 8 is a diagram illustrating a power delay profile of a transmitting antenna and a receiving antenna in the method for determining a channel impulse response according to an embodiment;
FIG. 9 is a diagram illustrating a channel impulse response in the method for determining a channel impulse response according to an embodiment;
fig. 10 is a uniform linear array angle measurement error distribution diagram under the phase deviation of the array antenna in the method for determining the channel impulse response in one embodiment;
FIG. 11 is a block diagram of an apparatus for determining a channel impulse response according to an embodiment;
FIG. 12 is a diagram illustrating an internal structure of a computer device according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In order to meet the increasingly rapid communication performance requirements, advanced wireless communication technologies are continuously evolving, and in order to better evaluate the performance of the wireless communication technologies, a link-level simulation platform capable of simulating a real wireless communication channel link is required, and the related physical layer communication technologies can be more accurately researched and evaluated through the link-level simulation platform.
Due to the expansion of the communication frequency band to millimeter waves and the requirement for higher-order modulation, the performance of a communication channel can be seriously influenced by hardware damage, so that the development of a wireless communication technology is restricted. It is therefore crucial to efficiently assess the impact of hardware impairments on channel performance. At present, the technology for evaluating the influence of such hardware damage as phase noise, carrier frequency offset and the like on the channel performance is relatively mature, but with the rapid development of the multi-antenna communication technology, the phase distortion of multipath signals also becomes the hardware damage which seriously influences the channel performance, and no effective evaluation method appears for the influence of the hardware damage of the type on the channel performance.
In addition, the existing channel performance evaluation method also has the problem that the channel performance is difficult to evaluate based on the hardware damage of time domain path energy dispersion due to inaccurate time delay. For example, a FIR-based channel filtering method may map a channel impulse response to a FIR filter through which an input signal is channel filtered. However, in this method, it is assumed that the delay of the path is an integer multiple of the minimum delay of the FIR filter, and therefore, the delay of the path with a finer granularity is approximately processed, so that the time domain path energy dispersion phenomenon caused by the time when the path delay value is not at the time sampling point cannot be accurately simulated. The channel filtering method based on the cyclic convolution can multiply the discrete Fourier transform of an input signal and the channel frequency response in a frequency domain, and then carry out inverse discrete Fourier transform to obtain a filtered signal. The precise time delay processing circuit structure based on multiphase processing can classify time delays according to scales, decimal time delay can be processed through the multiphase structure and the shift register, time domain resolution is improved to a certain extent, however, the method is still limited by clock rate, and the phenomenon of time domain path energy dispersion cannot be simulated.
Based on this, the present application provides a method, an apparatus, a device, a medium, and a program product for determining a channel impulse response, which can effectively evaluate the influence of the phase distortion of a multipath signal on the channel performance on the basis of obtaining an accurate path delay. The method for determining the channel impulse response provided by the embodiment of the application can be applied to the terminal shown in fig. 1. The terminal comprises a processor, a memory, a communication interface, a display screen and an input device which are connected through a system bus. Wherein the processor of the terminal is configured to provide computing and control capabilities. The memory of the terminal comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operating system and the computer program to run on the non-volatile storage medium. The communication interface of the terminal is used for carrying out wired or wireless communication with an external terminal, and the wireless communication can be realized through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. The computer program is executed by a processor to implement a method of determining a channel impulse response. The display screen of the terminal can be a liquid crystal display screen or an electronic ink display screen, and the input device of the terminal can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on a shell of the terminal, an external keyboard, a touch pad or a mouse and the like.
In one embodiment, as shown in fig. 2, a method for determining a channel impulse response is provided, which is applied to the terminal in fig. 1 for illustration, and it is understood that the method may also be applied to a server, and may also be applied to a system including the terminal and the server, and is implemented through interaction between the terminal and the server. Fig. 2 is a schematic flow chart of a method for determining a channel impulse response according to an embodiment of the present application, which specifically includes the following steps:
s201, acquiring parameter information of a target wireless channel.
In the embodiment of the application, in order to obtain the channel impulse response of the target wireless channel so as to evaluate the performance of the target wireless channel, the parameter information of the target wireless channel may be determined first.
In specific implementation, the parameter information of the target wireless channel can be obtained by an actual wireless environment channel measuring method or a ray tracing-based software simulation method.
The target wireless channel may be a wireless channel in a specific scenario, for example, a wireless channel in an indoor underground garage scenario. The parameter information of the wireless channel may include at least one of a delay spread, a rice K factor, an angle spread, a shadow fading, and a cross-polarization ratio.
S202, inputting the parameter information into a preset wireless channel model to obtain signal parameters of a plurality of paths.
The preset wireless channel model can be a wireless channel model specified by a 3GPP standard; the signal parameter of each of the plurality of paths may include at least one of an angle, a delay, and a gain of each path.
In a specific implementation, the acquired parameter information of the target radio channel may be input into a radio channel model specified in the 3GPP standard, so as to obtain signal parameters of multiple paths of the target radio channel.
S203, determining a phase offset sequence of each path according to the signal parameters of each path; the plurality of phase offset sequences represent phase distortions of the signals of the plurality of paths.
Wherein the phase offset sequence may represent phase distortion of the signals of the plurality of paths. The phase distortion of multipath signals is mainly caused by the mutual influence between the array antennas receiving the signals. The phase distortion in the embodiment of the present application is a phase shift caused by coupling between antennas after a phase shift caused by an array steering vector is removed from a phase shift of an array antenna.
In specific implementation, the angles in the signal parameters of each path can be processed, and the phase offset sequence of each path is determined based on the change of the angle parameters of each path caused by the influence among the array antennas; determining a phase offset sequence of each path based on changes in signal frequency of each path caused by the influence between the array antennas; and the signal frequency and the angle parameter of each path can be processed simultaneously, and the phase offset sequence of each path related to the signal frequency and the angle parameter is determined.
And S204, determining the channel impulse response of the target wireless channel according to the phase offset sequence of each path and the signal parameter of each path.
In a specific implementation, the channel impulse response of the target wireless channel may be determined based on the phase offset sequence of each path and all signal parameters of each path; that is, the channel impulse response of the target wireless channel may be determined based on the phase offset sequence of each path and the delay, gain, and angle of each path.
In one possible implementation, the channel impulse response of the target wireless channel may be determined based on the phase offset sequence of each path and other signal parameters except for the signal parameter generating the phase offset sequence of each path; for example, if the phase offset sequence of each path is generated based on the angle of each path, the channel impulse response of the target radio channel can be determined based on the phase offset sequence of each path and the delay and gain of each path.
According to the method, the device, the equipment, the medium and the program product for determining the channel impulse response, the multi-path signal parameters can be generated based on the parameter information of the target wireless channel, then the phase offset sequence of each path is determined based on the signal parameters of each path, and finally the channel impulse response of the target wireless channel is determined based on the phase offset sequence of each path, wherein the phase offset sequence represents the phase distortion of signals of a plurality of paths. Therefore, the channel impulse response of the wireless channel can be determined based on the phase shift sequence of each path, that is, the phase shift problem of the multipath signals received by the antenna array under the multi-antenna communication technology can be added into the channel performance evaluation, so that the evaluation of the influence of the hardware damage of the multipath signal phase shift caused by the mutual influence between the receiving antennas on the channel performance under the multi-antenna communication technology is realized.
The embodiments described above have described a scheme for determining the phase offset sequence for each path. In another embodiment of the present application, the phase offset sequence of each path may be determined according to an angle parameter in the signal parameters of each path. For example, the aforementioned "determining the phase offset sequence of each path according to the signal parameter of each path" specifically includes the steps shown in fig. 3:
and S301, determining the phase offset of each path according to the angle of each path.
In specific implementation, the phase offset of each path can be obtained through darkroom actual measurement or electromagnetic simulation software simulation based on the signal frequency of each path and the angle information in the signal parameter of each path.
Where the phase offset of each path can be expressed as betal,n,AOA,ZOAWherein l represents the l-th array antenna, n represents the n-th frequency point, AOA represents the arrival azimuth angle of each path signal, and ZOA represents the arrival zenith angle of each path signal.
S302, interpolation operation is carried out on each phase offset to obtain a target phase offset of each path.
When the phase offset sequence of each path is obtained through darkroom actual measurement or electromagnetic simulation, the selection of sufficient resolution precision for angles and frequency points can cause huge workload, so that the process of obtaining the phase offset of each path through darkroom actual measurement or electromagnetic simulation is rough measurement, and the obtained phase offset of each path has fewer elements and is coarse-grained phase offset.
Therefore, the phase shift amount can be interpolated, so that a fine-grained phase shift amount, that is, a target phase shift amount of each path, is obtained.
And S303, performing frequency domain conversion on the target phase shift amount of each path to obtain a phase shift sequence of each path.
In a specific implementation, the target phase offset of each path is subjected to frequency domain conversion, and the target phase offset of the time domain is converted into the frequency domain to obtain a phase offset sequence of each path, as shown in the following formula (1):
wherein,
is shown in the s time domainA phase offset sequence of a p-th path in a multipath channel transmitted from an mth transmitting antenna to an l-th receiving antenna in a symbol interval; s represents the number of OFDM time domain symbols; n represents the number of points of the fourier transform, i.e., the number of frequency points of the phase shift sequence; AOAp,sIndicating an azimuth of arrival of the p-th path within the s-th time domain symbol interval; ZOAp,sRepresenting the angle of arrival zenith of the p-th path within the s-th time-domain symbol interval.
The embodiment of the application provides a scheme for determining a phase offset sequence of each path, which is mainly to determine the phase offset of each path according to angle information of each path, and then sequentially perform interpolation processing and frequency domain transformation on the phase offset, so as to obtain the phase offset sequence of each path. It can be seen that the phase offset sequence of each path can be generated based on the angle information of each path, and the problem of the phase offset of the multipath signals received by the antenna array under the multi-antenna communication technology is added to the channel performance evaluation, so that the evaluation of the influence of the hardware damage of the phase offset of the multipath signals caused by the mutual influence between the receiving antennas on the channel performance under the multi-antenna communication technology is realized.
The embodiments described hereinbefore describe a scheme for determining the channel impulse response of a target wireless channel. In another embodiment of the present application, the channel impulse response of the target wireless channel may be determined based on the signal offset sequence and the time delay and gain of each path. For example, the aforementioned "determining the channel impulse response of the target wireless channel according to the phase offset sequence of each path and the signal parameter of each path" specifically includes the steps shown in fig. 4:
s401, synthesizing the signal parameters of each path and the phase offset sequence of each path to obtain a frequency domain offset sequence of each path.
In a specific implementation, the signal parameters of each path are processed, and the processing result of the signal parameters and the obtained phase offset sequence of each path are synthesized, so as to obtain the frequency domain offset sequence of each path.
The synthesis processing may be summation processing on the processing result of the signal parameters and the phase offset sequence of each path, or product processing, as long as the frequency domain offset sequence obtained by the synthesis processing can represent the frequency domain offset of each path caused by each signal parameter.
S402, accumulating and operating the frequency domain offset sequences of all paths to obtain a channel frequency domain offset sequence.
In a specific implementation, after the frequency domain offset sequences of each path are obtained, the frequency domain offset sequences of all paths may be accumulated and calculated to obtain a sum of the frequency domain offset sequences of all paths, that is, the frequency domain offset sequence of the channel.
And S403, sequentially performing cyclic shift, inverse Fourier transform and interception on the channel frequency domain offset sequence to obtain the channel impulse response of the target wireless channel.
In a specific implementation, N/2-point cyclic shift may be performed on the channel frequency domain offset sequence, as shown in the following formula (2), to obtain an N-point frequency domain response of the channel:
wherein, CFRm,l,sAn N-point frequency domain response for the channel; fp,m,l,sIs a channel frequency domain offset sequence; fftshift () represents a frequency domain cyclic shift of N/2 points.
And finally, carrying out data truncation processing on the time domain channel impulse response, and truncating a plurality of previous continuous points with the numerical value of 0 in the time domain channel impulse response sequence, thereby obtaining the final channel impulse response. The final channel impulse response is shown in equation (3):
CIRm,l,s＝truncate(IFFT(N)(CFRm,l,s)) (3)
wherein CIRm,l,sRepresenting the channel impulse response; IFFT(N)Represents the inverse fourier transform and truncate () represents the point before truncating the sequence.
The embodiment of the application provides a scheme for determining a channel impulse response based on a phase offset sequence and signal parameters of each path, and specifically, the scheme includes that a frequency domain offset sequence of each path is determined according to the phase offset sequence and the signal parameters of each path, then summation operation is performed on the frequency domain offset sequences of all paths to obtain a channel frequency domain offset sequence, and finally cyclic shift, inverse Fourier transform and data truncation processing are sequentially performed on the channel frequency domain offset sequence to obtain the channel impulse response. It can be seen that the channel impulse response of the wireless channel can be determined based on the phase offset sequence of each path, that is, the phase offset problem of the multipath signals received by the antenna array under the multi-antenna communication technology can be added into the channel performance evaluation, so that the evaluation of the influence of the hardware damage of the multipath signal phase offset caused by the mutual influence between the receiving antennas on the channel performance under the multi-antenna communication technology is realized.
In the foregoing embodiment, a scheme of obtaining the frequency domain offset sequence of each path according to the phase offset sequence of each path and the signal parameter is described. In another embodiment of the present application, the frequency domain offset sequence of each path may be obtained according to the phase offset sequence of each path and the gain and the time delay. For example, the "synthesizing the signal parameters of each path and the phase offset sequence of each path to obtain the frequency domain offset sequence of each path" mentioned above specifically includes the steps shown in fig. 5:
s501, converting the gain of each path into a frequency domain gain, and converting the time delay of each path into a frequency domain time delay.
In specific implementation, in order to synthesize the phase offset sequence and the signal parameter of each path to obtain the frequency domain offset sequence of each path, the gain and the delay of the time domain of each path may be first converted into the frequency domain, so as to synthesize the phase offset sequence and the signal parameter of each path in the frequency domain. Specifically, the gain may be converted into a frequency domain gain as shown in equation (4), and the delay may be converted into a frequency domain delay as shown in equation (5):
wherein,
representing the frequency domain gain of each path; gp,m,l,sIs the time domain gain of each path.
Wherein,
representing the frequency domain time delay of each path; Δ f represents the system subcarrier spacing; tau isp,m,l,sRepresenting the time domain delay of each path.
And S502, synthesizing the frequency domain gain of each path, the frequency domain time delay of each path and the phase offset sequence of each path into the frequency domain offset sequence of each path.
In specific implementation, the frequency domain gain of each path, the frequency domain delay of each path, and the phase offset sequence of each path are subjected to an operation of taking the product, as shown in formula (6), to obtain the frequency domain gain of each path, the frequency domain delay, and the hadamard product of the phase offset sequence, that is, the frequency domain offset sequence of each path:
wherein, Fp,m,l,sRepresenting the frequency domain offset sequence of path p.
The embodiment of the application provides a scheme for obtaining a frequency domain offset sequence of each path according to a phase offset sequence and signal parameters of each path, and specifically, frequency domain transformation is performed on gain and time delay of each path to obtain frequency domain gain and frequency domain time delay of each path, then product operation is performed on the frequency domain gain, the frequency domain time delay and the phase offset sequence of each path to obtain a hadamard product of the gain, the frequency domain time delay and the phase offset sequence of each path, and the hadamard product is obtained and is the frequency domain offset sequence of each path. Therefore, the method and the device consider the phase offset problem of the multipath signals received by the antenna array under the multi-antenna communication technology in the process of obtaining the channel impulse response, add the phase offset of the multipath signals into the channel performance evaluation, and realize the evaluation of the influence of the hardware damage of the phase offset of the multipath signals on the channel performance caused by the mutual influence between the receiving antennas under the multi-antenna communication technology.
Referring to fig. 6, fig. 6 is another schematic flow chart of the method for determining a channel impulse response according to the embodiment of the present application, where the method for determining a channel impulse response according to the embodiment of the present application may include the following steps:
s601, inputting the large-scale parameter information of the specific scene into a wireless channel generation module to obtain the gain, time delay and angle information of each path.
S602, inputting the angle information of each path into the array phase offset generation module to obtain an N-point array phase offset sequence of each path, i.e. the phase offset sequence of each path.
S603, inputting the gain, the time delay and the N-point array phase shift sequence of each path to the channel impulse response generation module to obtain a channel impulse response corresponding to the baseband sampling frequency, that is, the channel impulse response.
The implementation process of S603 is shown in fig. 7, and specifically includes:
s701, performing frequency domain transform on the gain of each path to obtain an N-point vector whose generating elements are all the gain values, that is, the frequency domain gain.
S702, perform frequency domain transformation on the time delay of each path to generate an N-point linear phase shift sequence, i.e. the frequency domain time delay.
And S703, synthesizing the frequency domain gain, the frequency domain delay and the phase offset sequence of each path, and starving the N-point frequency domain sequence, namely the frequency domain offset sequence of each path.
And S704, accumulating and calculating the frequency domain offset sequences of all paths, and sequentially performing N/2-point cyclic shift, N-point inverse Fourier transform and data interception on the calculation result to obtain the channel impulse response.
The method for determining the channel impulse response provided by the embodiment of the present application is illustrated by way of example, and specifically includes the following steps:
for channel impulse response simulation of uplink channel estimation based on SRS sounding signals of MIMO OFDM communication system, the number of transmitting and receiving antenna ports is assumed to be respectively expressed as M-1 and L-4, the receiving array is a uniform linear array, and the system center frequency f is02.565GHz, the signal bandwidth W is 100MHz, the number of OFDM time domain symbols is expressed as S1, the subcarrier spacing is Δ f 30kHz, the number of FFT transform points is N4096, and the number of multipath of the wireless channel is expressed as P15.
Firstly, acquiring large-scale parameter information of a wireless channel of an indoor underground garage scene in an actual wireless environment channel measurement mode, wherein the large-scale parameter information comprises time delay expansion, a Rice K factor, angle expansion, shadow fading, cross polarization ratio and the like, and generating each path parameter of a multi-path channel by using a wireless channel model specified by a 3GPP standard by taking the parameter information as input, wherein the parameter information comprises information of gain, time delay, angle and the like of each path. The gain and delay of the p-th path may be denoted as g, respectivelyp,m,l,sAnd τp,m,l,sWhere m denotes the corresponding mth transmit antenna, l denotes the corresponding lth receive antenna, sth symbol, AOAp,sIndicating the azimuth of arrival, ZOA, of each pathp,sRepresenting the angle of the zenith of arrival of each path.
The N-point frequency domain sequence generated by the p-th path and having all the elements of the path gain can be expressed as the above equation (4), and the N-point phase offset sequence obtained by the p-th path delay can be expressed as the above equation (5).
To obtain the phase shift sequence between the array antennas, it is necessary to obtain the phase shift amount between the uniform line grid antennas related to the frequency-angle by dark room actual measurement, where the phase shift between the array antennas means the phase shift between the antennas caused by mutual coupling and the like after the phase shift caused by the array steering vector is removed. Because the selection of sufficient resolution precision of corresponding angles and frequency points in real time can cause huge workload, 4096 frequency points are obtained through rough measurement and interpolation, and the horizontal and vertical angle ranges are both [ -60 degrees and 60 degrees DEG respectively]And the step precision is 0.1 degree of target phaseAn offset. Accordingly, the target phase offset amount may be expressed as βl,n,AOA,ZOAWhere n denotes the nth frequency point, where the phase offset refers to the phase difference between the corresponding different frequency point of the 1 st receiving antenna relative to the AOA and the zo value.
The phase offset sequence of each path obtained according to the angle information of the p-th path may be represented by equation (6) above, the frequency domain offset sequence of the p-th path synthesized may be represented by equation (1) above, the frequency domain offset sequences of all paths are accumulated to form a channel frequency domain offset sequence, then the channel frequency domain offset sequence after synthesis is subjected to N/2-point cyclic shift, the obtained N-point frequency domain response may be represented by equation (2) above, and the frequency domain response is subjected to IFFT transformation and data truncation to obtain a channel impulse response, which may be represented by equation (3) above.
The power delay distribution of the receiving and transmitting antenna obtained through simulation is shown in fig. 8, the channel impulse response caused by hardware damage is shown in fig. 9, and the distribution of the uniform linear array angle measurement errors under consideration of the array antenna phase deviation is shown in fig. 10.
It should be understood that, although the steps in the flowcharts related to the embodiments as described above are sequentially displayed as indicated by arrows, the steps are not necessarily performed sequentially as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a part of the steps in the flowcharts related to the embodiments described above may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the execution order of the steps or stages is not necessarily sequential, but may be rotated or alternated with other steps or at least a part of the steps or stages in other steps.
Based on the same inventive concept, the embodiment of the present application further provides a device for determining a channel impulse response, which is used for implementing the method for determining a channel impulse response mentioned above. The implementation scheme for solving the problem provided by the apparatus is similar to the implementation scheme described in the above method, so specific limitations in the following embodiment of one or more apparatus for determining a channel impulse response may refer to the limitations in the above method for determining a channel impulse response, and are not described herein again.
In one embodiment, as shown in fig. 11, there is provided a channel impulse response determining apparatus, including: the device comprises an acquisition module, an input module, a phase offset sequence determination module and a channel impulse response determination module, wherein:
an obtaining module 1101, configured to obtain parameter information of a target wireless channel;
an input module 1102, configured to input parameter information to a preset wireless channel model to obtain signal parameters of multiple paths;
a phase offset sequence determining module 1103, configured to determine a phase offset sequence of each path according to the signal parameter of each path; the plurality of phase offset sequences represent phase distortions of the signals of the plurality of paths;
and a channel impulse response determining module 1104, configured to determine a channel impulse response of the target wireless channel according to the phase offset sequence of each path and the signal parameter of each path.
In one embodiment, the signal parameter for each path comprises at least one of an angle, a time delay, and a gain of each path.
In an embodiment, the phase offset sequence determining module 1103 is specifically configured to determine a phase offset of each path according to an angle of each path; carrying out interpolation operation on each phase offset to obtain a target phase offset of each path; and performing frequency domain conversion on the target phase offset of each path to obtain a phase offset sequence of each path.
In one embodiment, the channel impulse response determining module 1104 is specifically configured to perform synthesis processing on the signal parameters of each path and the phase offset sequence of each path to obtain a frequency domain offset sequence of each path; accumulating and operating the frequency domain offset sequences of all paths to obtain a channel frequency domain offset sequence; and sequentially carrying out cyclic shift, inverse Fourier transform and interception on the channel frequency domain offset sequence to obtain the channel impulse response of the target wireless channel.
In one embodiment, on the basis of the above embodiment, the gain of each path is converted into a frequency domain gain, and the time delay of each path is converted into a frequency domain time delay; and synthesizing the frequency domain gain of each path, the frequency domain time delay of each path and the phase offset sequence of each path into the frequency domain offset sequence of each path.
In one embodiment, the parameter information of the target wireless channel includes: at least one of delay spread, Rice K factor, angle spread, shadow fading, cross-polarization ratio.
The various modules in the above-described channel impulse response determining means may be implemented in whole or in part by software, hardware, and combinations thereof. The modules can be embedded in a hardware form or independent of a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as shown in fig. 12. The computer device includes a processor, a memory, and a network interface connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities.
The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The database of the computer device is used to store some data related to the method for determining the channel impulse response according to the embodiment of the present application, for example, the signal parameters, the phase offset sequence, the channel phase offset sequence, and the channel impulse response of each path described above. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a method of determining a channel impulse response.
Those skilled in the art will appreciate that the configurations shown in fig. 1 and 12 are merely block diagrams of some configurations relevant to the present disclosure, and do not constitute a limitation on the computing devices to which the present disclosure may be applied, and that a particular computing device may include more or less components than those shown, or combine certain components, or have a different arrangement of components.
In one embodiment, a computer device is provided, comprising a memory and a processor, the memory having a computer program stored therein, the processor implementing the following steps when executing the computer program:
acquiring parameter information of a target wireless channel;
inputting the parameter information into a preset wireless channel model to obtain signal parameters of a plurality of paths;
determining a phase offset sequence of each path according to the signal parameter of each path; the plurality of phase offset sequences represent phase distortions of the signals of the plurality of paths;
and determining the channel impulse response of the target wireless channel according to the phase offset sequence of each path and the signal parameter of each path.
In one embodiment, the signal parameter for each path comprises at least one of an angle, a time delay, and a gain of each path.
In one embodiment, the processor, when executing the computer program, further performs the steps of: determining the phase offset of each path according to the angle of each path; carrying out interpolation operation on each phase offset to obtain a target phase offset of each path; and performing frequency domain conversion on the target phase offset of each path to obtain a phase offset sequence of each path.
In one embodiment, the processor, when executing the computer program, further performs the steps of: synthesizing the signal parameters of each path and the phase shift sequence of each path to obtain a frequency domain shift sequence of each path; accumulating and operating the frequency domain offset sequences of all paths to obtain a channel frequency domain offset sequence; and sequentially carrying out cyclic shift, inverse Fourier transform and interception on the channel frequency domain offset sequence to obtain the channel impulse response of the target wireless channel.
In one embodiment, the processor, when executing the computer program, further performs the steps of: converting the gain of each path into frequency domain gain, and converting the time delay of each path into frequency domain time delay; and synthesizing the frequency domain gain of each path, the frequency domain time delay of each path and the phase offset sequence of each path into the frequency domain offset sequence of each path.
In one embodiment, the parameter information of the target wireless channel includes: at least one of delay spread, Rice K factor, angle spread, shadow fading, cross-polarization ratio.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:
acquiring parameter information of a target wireless channel;
inputting the parameter information into a preset wireless channel model to obtain signal parameters of a plurality of paths;
determining a phase offset sequence of each path according to the signal parameter of each path; the plurality of phase offset sequences represent phase distortions of the signals of the plurality of paths;
and determining the channel impulse response of the target wireless channel according to the phase offset sequence of each path and the signal parameter of each path.
In one embodiment, the signal parameter for each path comprises at least one of an angle, a time delay, and a gain of each path.
In one embodiment, the computer program when executed by the processor further performs the steps of: determining the phase offset of each path according to the angle of each path; carrying out interpolation operation on each phase offset to obtain a target phase offset of each path; and performing frequency domain conversion on the target phase offset of each path to obtain a phase offset sequence of each path.
In one embodiment, the computer program when executed by the processor further performs the steps of: synthesizing the signal parameters of each path and the phase shift sequence of each path to obtain a frequency domain shift sequence of each path; accumulating and operating the frequency domain offset sequences of all paths to obtain a channel frequency domain offset sequence; and sequentially carrying out cyclic shift, inverse Fourier transform and interception on the channel frequency domain offset sequence to obtain the channel impulse response of the target wireless channel.
In one embodiment, the computer program when executed by the processor further performs the steps of: converting the gain of each path into frequency domain gain, and converting the time delay of each path into frequency domain time delay; and synthesizing the frequency domain gain of each path, the frequency domain time delay of each path and the phase shift sequence of each path into the frequency domain shift sequence of each path.
In one embodiment, the parameter information of the target wireless channel includes: at least one of delay spread, Rice K factor, angle spread, shadow fading, cross-polarization ratio.
In one embodiment, a computer program product is provided, comprising a computer program which, when executed by a processor, performs the steps of:
acquiring parameter information of a target wireless channel;
inputting the parameter information into a preset wireless channel model to obtain signal parameters of a plurality of paths;
determining a phase offset sequence of each path according to the signal parameter of each path; the plurality of phase offset sequences represent phase distortions of the signals of the plurality of paths;
and determining the channel impulse response of the target wireless channel according to the phase offset sequence of each path and the signal parameter of each path.
In one embodiment, the signal parameter for each path comprises at least one of an angle, a time delay, and a gain of each path.
In one embodiment, the computer program when executed by the processor further performs the steps of: determining the phase offset of each path according to the angle of each path; carrying out interpolation operation on each phase offset to obtain a target phase offset of each path; and performing frequency domain conversion on the target phase offset of each path to obtain a phase offset sequence of each path.
In one embodiment, the computer program when executed by the processor further performs the steps of: synthesizing the signal parameters of each path and the phase shift sequence of each path to obtain a frequency domain shift sequence of each path; accumulating and operating the frequency domain offset sequences of all paths to obtain a channel frequency domain offset sequence; and sequentially carrying out cyclic shift, inverse Fourier transform and interception on the channel frequency domain offset sequence to obtain the channel impulse response of the target wireless channel.
In one embodiment, the computer program when executed by the processor further performs the steps of: converting the gain of each path into frequency domain gain, and converting the time delay of each path into frequency domain time delay; and synthesizing the frequency domain gain of each path, the frequency domain time delay of each path and the phase offset sequence of each path into the frequency domain offset sequence of each path.
In one embodiment, the parameter information of the target wireless channel includes: at least one of delay spread, Rice K factor, angle spread, shadow fading, cross-polarization ratio.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, database, or other medium used in the embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, high-density embedded nonvolatile Memory, resistive Random Access Memory (ReRAM), Magnetic Random Access Memory (MRAM), Ferroelectric Random Access Memory (FRAM), Phase Change Memory (PCM), graphene Memory, and the like. Volatile Memory can include Random Access Memory (RAM), external cache Memory, and the like. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others. The databases referred to in various embodiments provided herein may include at least one of relational and non-relational databases. The non-relational database may include, but is not limited to, a block chain based distributed database, and the like. The processors referred to in the embodiments provided herein may be general purpose processors, central processing units, graphics processors, digital signal processors, programmable logic devices, quantum computing based data processing logic devices, etc., without limitation.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, and these are all within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.
Claims (10)
1. A method for determining a channel impulse response, the method comprising:
acquiring parameter information of a target wireless channel;
inputting the parameter information into a preset wireless channel model to obtain signal parameters of a plurality of paths;
determining a phase offset sequence of each path according to the signal parameter of each path; a plurality of said phase offset sequences representing phase distortions of signals of a plurality of said paths;
and determining the channel impulse response of the target wireless channel according to the phase offset sequence of each path and the signal parameter of each path.
2. The method of claim 1, wherein the signal parameter for each of the paths comprises at least one of an angle, a time delay, and a gain for each of the paths.
3. The method of claim 1, wherein determining the phase offset sequence for each of the paths based on the signal parameters for each of the paths comprises:
determining a phase offset amount of each path according to the angle of each path;
performing interpolation operation on each phase offset to obtain a target phase offset of each path;
and performing frequency domain conversion on the target phase offset of each path to obtain a phase offset sequence of each path.
4. The method of claim 1 or 3, wherein determining the channel impulse response of the target wireless channel based on the phase shift sequence of each of the paths and the signal parameters of each of the paths comprises:
synthesizing the signal parameters of each path and the phase shift sequence of each path to obtain a frequency domain shift sequence of each path;
accumulating and operating the frequency domain offset sequences of all paths to obtain a channel frequency domain offset sequence;
and sequentially carrying out cyclic shift, inverse Fourier transform and interception on the channel frequency domain offset sequence to obtain the channel impulse response of the target wireless channel.
5. The method of claim 4, wherein the synthesizing the signal parameter of each of the paths and the phase offset sequence of each of the paths to obtain a frequency domain offset sequence of each of the paths comprises:
converting the gain of each path into a frequency domain gain, and converting the time delay of each path into a frequency domain time delay;
and synthesizing the frequency domain gain of each path, the frequency domain time delay of each path and the phase offset sequence of each path into the frequency domain offset sequence of each path.
6. The method of claim 1, wherein the parameter information of the target wireless channel comprises: at least one of delay spread, Rice K factor, angle spread, shadow fading, cross-polarization ratio.
7. An apparatus for determining a channel impulse response, the apparatus comprising:
the acquisition module is used for acquiring parameter information of a target wireless channel;
the input module is used for inputting the parameter information into a preset wireless channel model to obtain signal parameters of a plurality of paths;
a phase offset sequence determination module, configured to determine a phase offset sequence of each path according to a signal parameter of each path; a plurality of said phase offset sequences representing phase distortions of signals of a plurality of said paths;
and the channel impulse response determining module is used for determining the channel impulse response of the target wireless channel according to the phase shift sequence of each path and the signal parameter of each path.
8. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor, when executing the computer program, implements the steps of the method of any of claims 1 to 6.
9. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 6.
10. A computer program product comprising a computer program, characterized in that the computer program realizes the steps of the method of any one of claims 1 to 6 when executed by a processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210264039.9A CN114615115B (en) | 2022-03-17 | 2022-03-17 | Method, apparatus, device, medium and program product for determining channel impulse response |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210264039.9A CN114615115B (en) | 2022-03-17 | 2022-03-17 | Method, apparatus, device, medium and program product for determining channel impulse response |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114615115A true CN114615115A (en) | 2022-06-10 |
| CN114615115B CN114615115B (en) | 2024-03-22 |
Family
ID=81864333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210264039.9A Active CN114615115B (en) | 2022-03-17 | 2022-03-17 | Method, apparatus, device, medium and program product for determining channel impulse response |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114615115B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024140593A1 (en) * | 2022-12-29 | 2024-07-04 | 网络通信与安全紫金山实验室 | Information processing method and apparatus, signal positioning method and apparatus, device and medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101076001A (en) * | 2006-05-15 | 2007-11-21 | 中兴通讯股份有限公司 | Method for estimating channel based on orthogonal frequency division multiplexing system |
| CN108988963A (en) * | 2018-04-12 | 2018-12-11 | 华为技术有限公司 | A kind of test method, transmitting equipment and test equipment and test macro |
| CN112039608A (en) * | 2020-08-24 | 2020-12-04 | ***通信集团终端有限公司 | Method, device and equipment for evaluating multi-antenna terminal and computer storage medium |
| US20210333386A1 (en) * | 2020-04-28 | 2021-10-28 | Infineon Technologies Ag | Mimo radar apparatuses and mimo radar methods |
-
2022
- 2022-03-17 CN CN202210264039.9A patent/CN114615115B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101076001A (en) * | 2006-05-15 | 2007-11-21 | 中兴通讯股份有限公司 | Method for estimating channel based on orthogonal frequency division multiplexing system |
| CN108988963A (en) * | 2018-04-12 | 2018-12-11 | 华为技术有限公司 | A kind of test method, transmitting equipment and test equipment and test macro |
| US20210333386A1 (en) * | 2020-04-28 | 2021-10-28 | Infineon Technologies Ag | Mimo radar apparatuses and mimo radar methods |
| CN112039608A (en) * | 2020-08-24 | 2020-12-04 | ***通信集团终端有限公司 | Method, device and equipment for evaluating multi-antenna terminal and computer storage medium |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024140593A1 (en) * | 2022-12-29 | 2024-07-04 | 网络通信与安全紫金山实验室 | Information processing method and apparatus, signal positioning method and apparatus, device and medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114615115B (en) | 2024-03-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102879781B (en) | Distributed synthetic aperture radiometer array imaging method and system | |
| KR102436859B1 (en) | Method and system for testing wireless performance of wireless terminals | |
| US9763216B2 (en) | Radiator localization | |
| US20190013849A1 (en) | Device and method for testing mimo scheme system | |
| CN104618041B (en) | A kind of channel data back method and device | |
| CN106160882B (en) | A kind of multiband wireless channel measurement calibration method and system | |
| CN113542162B (en) | Uplink and downlink communication perception integrated method based on block sparse Bayesian algorithm | |
| CN114615115B (en) | Method, apparatus, device, medium and program product for determining channel impulse response | |
| CN104348763A (en) | Channel measuring method for large-scale antennas, and user terminal | |
| CN104537171A (en) | MIMO channel spatial fading correlation calculation method and multi-antenna system | |
| Beardsley et al. | An efficient feedback calibration algorithm for direct imaging radio telescopes | |
| WO2024146387A1 (en) | Antenna phase error correction method and apparatus, base station, and storage medium | |
| CN111490950B (en) | Channel construction method and communication equipment | |
| JP2022517542A (en) | Test methods, devices and test instruments for wireless frequency performance of wireless devices | |
| CN112512074B (en) | Equipment performance testing method and device | |
| CN115834303B (en) | Adaptive frequency domain channel estimation method, device, communication equipment and storage medium | |
| CN106908760B (en) | Single-station passive positioning method based on array autocorrelation matrix | |
| CN115913408B (en) | Antenna phase error correction method, device, base station and storage medium | |
| CN1351456A (en) | Method for obtaining transmission gain function | |
| US11802898B2 (en) | Method, apparatus, and device of reconstructing non-kronecker structured channels | |
| Alimohammad et al. | A compact architecture for simulation of spatio-temporally correlated MIMO fading channels | |
| Li et al. | A novel method for DOA and time delay joint estimation in multipath OFDM environment | |
| CN117879626A (en) | Anti-interference filtering method, device, equipment, medium and product for analog phased array | |
| CN117538854B (en) | Ranging method, ranging apparatus, computer device, and computer-readable storage medium | |
| JP2003323292A (en) | Random number sequence generation device and random number sequence generation method, and propagation model simulation device and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |