CN115189705B - Method for determining wireless receiving parameter, dual-mode communication method and system thereof - Google Patents
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Abstract
The invention relates to the field of communication, and discloses a method for determining wireless receiving parameters, a dual-mode communication method and a system thereof. The determination method comprises the following steps: transmitting the leader sequence by the HPLC path in a specific frequency band; receiving a plurality of data groups by an HRF path in a zero intermediate frequency mode, and transforming the received data groups to obtain a plurality of frequency domain data groups, wherein in the zero intermediate frequency mode, a cut-off frequency of an adopted low-pass filter is a starting frequency of the specific frequency band, and the data groups comprise interference signals of a transmitting process of a preamble sequence to a receiving process of the data groups; and determining the optimal intermediate frequency point of the HRF under each bandwidth option in the receiving process in a low-intermediate frequency mode according to the cut-off frequency, the plurality of frequency domain data sets and the intermediate frequency bandwidth under each bandwidth option. The invention can effectively reduce the influence of the bandwidth and the out-of-band leakage of direct current and HPLC signals on the HRF, namely, the interference of a wired channel on a wireless channel is reduced to the maximum extent.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a method for determining a wireless reception parameter, a dual-mode communication method, and a system thereof.
Background
High speed power line carrier communication (HPLC) is a wired communication technology that utilizes power wiring to transmit and receive communication signals. Because the power line network is widely distributed, the power line is used as a communication medium, and the communication network is not required to be reconstructed by punching and wiring indoors, so that the power line network has the advantages of low cost, convenience in connection and the like, and is paid more and more attention to the aspects of smart power grids and broadband access. The performance of power line communication is mainly restricted by a power line communication channel, and due to the characteristics of various network structures, complex load conditions, complex equipment types and the like of a power distribution network, isolated nodes appear in the network. In addition, as the types of grid services increase and the use environment becomes complicated, reliable and stable communication also becomes critical. In order to solve the information islanding and ensure reliable and stable communication, attention is paid to a dual-mode communication mode (namely a wired and wireless dual-mode communication mode) of HPLC _ HRF (HRF: high-speed wireless communication).
The HPLC _ HRF dual-mode communication system may be a bursty ad hoc network communication system, wired communication and wireless communication coexist in a network, and each node cannot completely determine whether a wired HPLC or wireless HRF mode is used for sending data by other nodes, so that a wired path and a wireless path of each node must monitor a communication channel in real time, thereby ensuring signal reception, increase of networking speed, reliability of route maintenance and update, and the like. However, in the communication process, the same node may perform wired and wireless simultaneous reception. Since HPLC _ HRF is a bursty, non-synchronized system, some nodes may also receive wireless or wired data when transmitting wired or wirelessly. The HPLC-HRF system belongs to a single-network dual-channel system, namely, the upper layer adopts a set of protocol software to maintain the network and the application, and the bottom layer adopts a wired channel and a wireless channel which are independent. In chip design, in order to save chip cost and module cost, a single chip scheme is generally adopted, that is, wired and wireless functions and functions of upper layer protocol software are simultaneously completed on the same chip.
For HPLC, communication is performed using baseband signals, the bandwidths including 4 bandwidths/bands Band0, band1, band2, band3 as shown in table 1; for the HRF, 3 bandwidth options Option1, option2, option3 as shown in table 2 are employed. For wireless transmission, a bandwidth Option1, option2 or Option3 baseband signal is up-converted to a carrier frequency (within the range of 470MHz to 510MHz), and a receiving side adopts a zero intermediate frequency scheme to directly down-convert the signal to the baseband signal. In order to avoid interference of direct current components to useful signals in zero intermediate frequency reception, a low intermediate frequency scheme is adopted to carry out down-conversion on signals to intermediate frequency signals with a certain central frequency Fm and a certain intermediate frequency bandwidth Bm, and the intermediate frequency signals are subjected to digital down-conversion to baseband signals. When the node simultaneously performs wired transmission and wireless reception, a transmitted wired signal is coupled to the intermediate frequency of a wireless receiving channel through a power supply or other circuits inside the chip; similarly, when the node is performing wired reception simultaneously with wireless reception, the received wired signal may be coupled to the intermediate frequency of the wireless reception path via a power supply, or other circuitry. As shown in fig. 1, if the center frequency of the intermediate frequency is not properly selected, and harmonics generated by the leaked wired signal may cause interference to the wireless reception signal in-band. HRF wireless signals can reach-166 dBm/Hz after channel attenuation (the maximum transmission power of Option3 is about-36 dBm/Hz, and the maximum transmission power of Option2 is-40 dBm/Hz). The out-of-band power requirement of the cable signal is satisfied at-75 dBm/Hz. If the wired signal is leaked out of band and coupled into the bandwidth of the wireless signal, the reception sensitivity is drastically deteriorated. In addition, the existence of direct current also affects the receiving performance. The maximum bandwidth capable of isolating between wireless and wired depends on the band and the Option used in practice, which may be narrower, and high-pass and low-pass filters with lower stages are generally selected to reduce the complexity of filter design for simulation. After the wired signal is coupled through the circuit, multiple harmonics of the interference signal may occur, which may aggravate the influence on the wireless signal. Therefore, the design of the intermediate bandwidth becomes crucial for the center frequency of the intermediate frequency. As shown in fig. 1, the direct current interferes with the HRF signal of the out-of-band portion of the HPLC signal. The if center frequency and bandwidth are not properly designed, resulting in HPLC mixing with the if signal of HRF, as shown in fig. 2. If the center frequency of the intermediate frequency is designed to be relatively close to the direct current, the influence of the direct current becomes serious although the influence of HPLC on HRF becomes small, as shown in FIG. 3.
Table 1 HPLC baseband frequency range and effective bandwidth.
Table 2 HRF bandwidth.
For a general intermediate frequency receiver, if fixed intermediate frequency and intermediate frequency bandwidths are adopted, the frequency spectrum region corresponding to the intermediate frequency point and the intermediate frequency bandwidth cannot be ensured to be an optimal receiving region; the method adopts variable intermediate frequency and variable intermediate frequency bandwidth, only considers the influence of direct current, and does not consider the influence of the unreasonable intermediate frequency point, which causes the ending boundary of the wireless bandwidth to be closer to the real boundary of the wired bandwidth or directly overlap.
Disclosure of Invention
The invention aims to provide a method for determining wireless receiving parameters, a dual-mode communication method and a system thereof, which can configure the optimal intermediate frequency point in wireless communication according to the adopted wired and wireless bandwidths, thereby effectively reducing the influence of the bandwidths and the out-of-band leakage of direct current and HPLC signals on HRF (high resolution ratio), namely reducing the interference of a wired channel on a wireless channel to the maximum extent.
In order to achieve the above object, a first aspect of the present invention provides a method for determining a radio reception parameter, the method comprising: transmitting the leader sequence by the HPLC path in a specific frequency band; receiving a plurality of data groups by an HRF path in a zero intermediate frequency mode, and transforming the received data groups to obtain a plurality of frequency domain data groups, wherein in the zero intermediate frequency mode, a cut-off frequency of an adopted low-pass filter is a starting frequency of the specific frequency band, and the data groups comprise interference signals of a transmitting process of a preamble sequence to a receiving process of the data groups; and determining the optimal intermediate frequency point of the HRF under each bandwidth option in the process of receiving in a low-intermediate frequency mode according to the cut-off frequency of the low-pass filter, the plurality of frequency domain data sets and the intermediate frequency bandwidth under each bandwidth option.
Preferably, the determining an optimal intermediate frequency point of the HRF path under each bandwidth option in the process of receiving in a low intermediate frequency manner includes: determining the number of the intermediate frequency points under each bandwidth option according to the cut-off frequency of the low-pass filter and the intermediate frequency bandwidth under each bandwidth option; determining the average power of a segment which is divided into a plurality of data segments by each frequency domain data group and has the intermediate frequency point in each data segment as the center and the intermediate frequency band under each bandwidth option as the width under each bandwidth option in the plurality of frequency domain data groups according to the plurality of data segments which are divided by each frequency domain data group and the intermediate frequency bandwidth under each bandwidth option, wherein the number of the plurality of data segments is equal to the number of the intermediate frequency points under each bandwidth option; and determining the intermediate frequency point as the optimal intermediate frequency point under a bandwidth option under the condition that the average power of the segments which take an intermediate frequency point under the bandwidth option as the center and the intermediate frequency band under the bandwidth option as the width in the plurality of frequency domain data groups is the minimum value.
Preferably, the determining the average power of the segments, which are centered at the intermediate frequency point in each data segment and are wide at the intermediate frequency band in each bandwidth option, in the plurality of frequency domain data groups includes: determining intermediate frequency points in each data segment according to a plurality of data segments formed by dividing each frequency domain data group; and determining the average power of the segments under each bandwidth option, which take the intermediate frequency point in each data segment as the center and the intermediate frequency band under each bandwidth option as the width, according to the plurality of data segments in each frequency domain data group, the intermediate frequency bandwidth under each bandwidth option and the intermediate frequency point in each data segment in the plurality of data segments.
Preferably, the determining the average power of the segment under each bandwidth option, which is centered at the intermediate frequency point in each data segment and is wide at the intermediate frequency band under each bandwidth option, includes: according to the firstlWithin a frequency domain data setkA sample dataR(l，k)Number of the plurality of frequency domain data setsLThe intermediate frequency bandwidth Bm (at each bandwidth option)OptIdx) The first mentionedlDetermining the average power of the segments under each bandwidth option, which take the intermediate frequency point in each data segment as the center and the intermediate frequency band under each bandwidth option as the width, according to the intermediate frequency point fk (n) in the nth data segment in each frequency domain data group and the following formula,
wherein Bk = Bm: (OptIdx)/2。
Through the technical scheme, the invention creatively sends the leader sequence by the HPLC path in a specific frequency band; receiving a plurality of data sets by an HRF path in a zero intermediate frequency mode, and transforming the received plurality of data sets to obtain a plurality of frequency domain data sets; and determining the optimal intermediate frequency point of the HRF under each bandwidth option in the low-intermediate frequency receiving process according to the cut-off frequency of the low-pass filter, the plurality of frequency domain data sets and the intermediate frequency bandwidth under each bandwidth option, so that the optimal intermediate frequency point in wireless communication can be configured according to the adopted wired and wireless bandwidths, the influence of the bandwidth and the out-of-band leakage of direct current and HPLC signals on the HRF can be effectively reduced, and the interference of the wired channel on the wireless channel can be reduced to the maximum extent.
A second aspect of the present invention provides a dual mode communication method, including: determining a specific optimal intermediate frequency point and a specific intermediate frequency bandwidth to be adopted by an HRF (high performance liquid chromatography) channel from an optimal configuration table according to a specific frequency band to be adopted by the HPLC channel and a specific bandwidth option to be adopted by the HRF channel, wherein the optimal configuration table comprises: the frequency band adopted by the HPLC channel and the bandwidth option and the intermediate frequency bandwidth adopted by the HRF channel correspond to the optimal intermediate frequency point determined by the method for determining the wireless receiving parameters; and communicating by the HPLC pathway using the particular frequency band; and the HRF channel receives the signals in a low-intermediate frequency mode by adopting the specific optimal intermediate frequency point and the specific intermediate frequency bandwidth.
Through the technical scheme, the invention can creatively determine the optimal intermediate frequency point and the intermediate frequency bandwidth in wireless communication from the optimal configuration table according to the frequency band and the HRF bandwidth of HPLC, and in the process of adopting the frequency band communication by the HPLC channel, the HRF channel adopts the determined optimal intermediate frequency point and the intermediate frequency bandwidth to receive data in a low-intermediate frequency mode, so that the influence of the bandwidth and the out-of-band leakage of direct current and HPLC signals on the HRF can be effectively reduced, namely the interference of a wired channel on a wireless channel is reduced to the maximum extent.
A third aspect of the present invention provides a system for determining a radio reception parameter, the system comprising: transmitting means for transmitting the preamble sequence in a specific frequency band by the HPLC path; receiving means, configured to receive multiple data groups in a zero intermediate frequency manner through an HRF path, and transform the received multiple data groups to obtain multiple frequency-domain data groups, where in the zero intermediate frequency manner, a cutoff frequency of an adopted low-pass filter is a starting frequency of the specific frequency band, and the data groups include interference signals of a receiving process of the data groups in a transmitting process of a preamble sequence; and an intermediate frequency point determining device, configured to determine, according to the cutoff frequency of the low-pass filter, the multiple frequency domain data sets, and the intermediate frequency bandwidth in each bandwidth option, an optimal intermediate frequency point in the low-intermediate frequency receiving process of the HRF access in each bandwidth option.
Preferably, the intermediate frequency point determining device includes: the number determining module is used for determining the number of the intermediate frequency points under each bandwidth option according to the cut-off frequency of the low-pass filter and the intermediate frequency bandwidth under each bandwidth option; the power determining module is used for determining the average power of the segments which are divided into a plurality of data segments by each frequency domain data group and the intermediate frequency bandwidth under each bandwidth option and take the intermediate frequency point in each data segment as the center and the intermediate frequency bandwidth under each bandwidth option as the width under each bandwidth option in the plurality of frequency domain data groups, wherein the number of the plurality of data segments is equal to the number of the intermediate frequency points under each bandwidth option; and the intermediate frequency point determining module is used for determining the intermediate frequency point as the optimal intermediate frequency point under a bandwidth option under the condition that the average power of the segments which take the intermediate frequency point under the bandwidth option as the center and the intermediate frequency band under the bandwidth option as the width in the plurality of frequency domain data groups is the minimum value.
Preferably, the power determining module includes: the intermediate frequency point determining unit is used for determining the intermediate frequency point in each data segment according to a plurality of data segments formed by dividing each frequency domain data group; and a power determining unit, configured to determine, according to the multiple data segments in each frequency domain data group, the intermediate frequency bandwidth in each bandwidth option, and the intermediate frequency point in each data segment in the multiple data segments, an average power of a segment, which is centered on the intermediate frequency point in each data segment and is wide in the intermediate frequency band in each bandwidth option, in each bandwidth option.
For details and advantages of the system for determining wireless receiving parameters provided by the present invention, reference may be made to the above description of the method for determining wireless receiving parameters, which is not described herein again.
A fourth aspect of the present invention provides a dual mode communication system, including: a parameter determining device, configured to determine, according to a specific frequency band to be used by an HPLC channel and a specific bandwidth option to be used by an HRF channel, a specific optimal intermediate frequency point and a specific intermediate frequency bandwidth to be used by the HRF channel from an optimal configuration table, where the optimal configuration table includes: the frequency band adopted by the HPLC channel, the bandwidth option and the intermediate frequency bandwidth adopted by the HRF channel and the corresponding relation between the optimal intermediate frequency points determined according to the method for determining the wireless receiving parameters; and a first communication module for communicating by the HPLC path using the specific frequency band; and a second communication module, configured to receive, by the HRF path, the specific optimal intermediate frequency point and the specific intermediate frequency bandwidth in a low-intermediate frequency manner.
For specific details and benefits of the dual-mode communication system provided by the present invention, reference may be made to the above description for the dual-mode communication method, which is not described herein again.
A fifth aspect of the present invention provides a chip, configured to execute instructions, where the instructions, when executed by the chip, implement the method for determining a wireless receiving parameter and/or the method for dual-mode communication.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention without limiting the embodiments of the invention. In the drawings:
FIG. 1 is a schematic of the effect of HPLC out-of-band signal and DC on HRF signal;
FIG. 2 is a schematic illustration of the effect of HPLC signal mixing with HRF signal on HRF signal;
FIG. 3 is a schematic diagram of the effect of DC on HRF signals;
fig. 4A is a flowchart of a method for determining a wireless receiving parameter according to an embodiment of the present invention;
fig. 4B is a flowchart of determining an optimal if frequency point of the HRF path under each bandwidth option in a low if mode receiving process according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a dual-mode communication system according to an embodiment of the present invention;
FIG. 6 is a flowchart of an optimal configuration acquisition process provided by an embodiment of the present invention; and
fig. 7 is a flowchart of a dual-mode communication method according to an embodiment of the present invention.
Detailed Description
The following describes in detail embodiments of the present invention with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are given by way of illustration and explanation only, not limitation.
Fig. 4A is a flowchart of a method for determining a wireless receiving parameter according to an embodiment of the present invention. As shown in fig. 4A, the determination method may include the following steps S401 to S403.
In step S401, the leader sequence is transmitted in a specific frequency band by the HPLC path.
The HPLC path module 10 performs data transmission and reception processing of the wired path according to the system configuration (as shown in table 3) provided by the main control module 20, as shown in fig. 5. During the optimal configuration acquisition process (e.g., the acquisition process of the optimal configuration table), the HPLC path module 10 may continuously send the fixed preamble sequence to ensure that the HRF path receives the data interfered by the HPLC path.
Table 3 HPLC path module key configuration information.
The HPLC path module 10 performs transceiving operation through a Band (Band) and status indication configured by the main control module 20. When the status indicates an optimal configuration acquisition process, the HPLC path module 10 performs uninterrupted preamble transmission under the configuration Band; when the status indicates that the system is in a normal working process, the HPLC path module 10 performs normal data reception and transmission under the configuration Band.
Step S402, receiving a plurality of data sets by the HRF path in a zero intermediate frequency manner, and transforming the received plurality of data sets to obtain a plurality of frequency domain data sets.
In the zero intermediate frequency mode, the cut-off frequency of the adopted low-pass filter is the starting frequency of the specific frequency band, and the data group comprises an interference signal of a transmitting process of a preamble sequence to a receiving process of the data group.
Wherein the length of the data group is determined by the sampling rate and the sampling time of the HRF path. The sampling rate needs to be greater than or equal to the start frequency of the particular frequency band, and the sampling time needs to be greater than or equal to the time length of an OFDM symbol (of HRF). For example, the sampling frequency may be 6.25MHz, the sampling time is 122.88us of the time length of the OFDM symbol of the HRF, and the length of each data group is 6.25mhz × 122.88us =768.
The HRF path module 30 performs the data transmission and reception processing of the radio path according to the system configuration provided by the main control module 20 (as shown in table 4), as shown in fig. 5. When the status indicates an optimal configuration acquisition process, the HRF path module 30 performs zero-if reception with the starting frequency of Band of HPLC (for example, the starting frequency of Band3 in table 1 is 1.758MHz, and 1.7MHz is usually adopted) as the bandwidth configuration (i.e., cutoff frequency) of the low-pass filter, and converts the received data to the frequency domain. When the status indicates a normal operation process of the system, the HRF path module 30 performs the reception of the HRF signal in the optimal reception configuration corresponding to the bandwidth Option (Option).
Table 4 HRF path module key configuration information.
Specifically, in the optimal configuration acquisition process, a plurality of data groups are received by the HRF path in a zero intermediate frequency manner, where each data group includes an interference signal of a transmission process (wired transmission) of a preamble sequence to a reception process (wireless reception) of the data group, and then the received plurality of data groups are transformed to acquire a plurality of frequency domain data groups corresponding to the plurality of data groups.
Step S403, determining an optimal intermediate frequency point of the HRF channel under each bandwidth option in a low-intermediate frequency receiving process according to the cutoff frequency of the low-pass filter, the multiple frequency domain data sets, and the intermediate frequency bandwidth under each bandwidth option.
For the intermediate frequency point and the intermediate frequency bandwidth of the HRF, the method has the following limitations:
A. if the intermediate frequency point supported by the radio frequency front end of the HRF is too high, the digital front end of the HRF must support a higher digital sampling rate;
B. if the arrangement of the intermediate frequency point and the intermediate frequency bandwidth of the HRF causes the bandwidth overlapping with the bandwidth of Band adopted by HPLC, the interference of wired to wireless is caused;
C. if the intermediate bandwidth of the HRF is set too narrow, it inevitably leads to difficulties in front-end filter design.
Based on the above problems and a simple and convenient processing manner, the present embodiment recommends that the if frequency points of the HRF are set within 0MHz to 2mhz, and the if bandwidth supports 0.2MHz, 0.5MHz, and 1MHz, as shown in table 4.
And setting the intermediate frequency according to the frequency of 0MHz to 2MHz, and ensuring that the optimal detection range does not exceed the limit of a maximum intermediate frequency point and the intermediate frequency bandwidth under various options, namely the maximum detection frequency is Fm + Bm/2.
The medium frequency bandwidth is set according to the bandwidth interval, so that the requirements of the bandwidth on the design of the filter are reduced on one hand, and the out-of-band interference can be reduced by reserving the protection sideband on the other hand.
For step S403, the determining the optimal if frequency point of the HRF path under each bandwidth option in the low if mode receiving process may include the following steps S4031 to S4033, as shown in fig. 4B.
The optimal detection module 40 in fig. 5 only operates during the optimal configuration acquisition process, and the other states are closed. In the Band and zero-if receiving bandwidth option specified by the main control module 20, the intermediate frequency point is used as the center and the intermediate frequency bandwidth is used as the interval, the power of the segments is calculated, the intermediate frequency point corresponding to the segment with the minimum power is selected as the optimal configuration, and the optimal configuration is reported to the main control module 20. As defined in the design of the HRF path module 30, the intermediate frequency point of the HRF is set within 0MHz to 2mhz, and the intermediate frequency bandwidth is selected from 0.2MHz (Option 3), 0.5MHz (Option 2), and 1MHz (Option 1). The detected if frequency range is accurate to 0.1MHz as shown in table 5 for different Band and Option combinations. The key configuration information of the main control module 20 to the optimal detection module 40 is shown in table 6.
Table 5 HRF intermediate frequency range.
And 6, optimally detecting key configuration information.
Let OptIdx denote the index that needs to go through Option, and the values 1, 2, 3 denote Option1, option2, option3, respectively. The optimum detection module 40 of fig. 5 operates as follows.
Step S4031, determining the number of if frequency points in each bandwidth option according to the cutoff frequency of the low-pass filter and the if bandwidth in each bandwidth option.
The process of determining the number of the intermediate frequency points under each bandwidth option mainly comprises the following two conditions.
(1) For the RF with any intermediate frequency, according to the cut-off frequency Bw of the low-pass filter and the intermediate frequency bandwidth Bm (OptIdx) Determining the number of intermediate frequency points under each bandwidth optionMesh:
FmNum(OptIdx)=floor（Bw/Bm(OptIdx)) ，(1)
wherein Bw is determined by Band configured by HPLC, for example, it can be 0.7MHz, 1.7MHz,2MHz; bm (ii) (OptIdx) RepresentOptIdxSelecting the corresponding intermediate frequency bandwidth according to the table 5; floor (.) represents rounding down.
In one embodiment, the HPLC uses a specific Band3 (e.g., 1.758-2.930 MHz shown in table 1) to continuously transmit the preamble sequence, and the HRF uses Option2 (e.g., 0.5MHz shown in table 2) for data reception. Accordingly, the cutoff frequency of the low-pass filter adopted by the HRF in the zero-if mode can be determined to be 1.7MHz according to the specific frequency Band3; option2 (can then be determined according to equation (1) ()OptIdxThe number of the intermediate frequency points FmNum (2) in 2) is equal to 3.
(2) For RF whose IF frequency is not freely configurable, fmNum is equal to the number of RF supportable IF frequencies in the IF range of HRF, and the IF bandwidth is selected according to Option and Table 5.
As can be seen from table 5, if Option is Option1 and Band is Band2, only zero if reception can be used during normal reception. Since the zero intermediate frequency reception is not an improvement point of the present invention in the normal reception process, the present invention can be performed in the existing manner, which is not described herein. At this time, the optimal reception mode RecFlag (OptIdx) is set to zero intermediate frequency reception (during normal reception), i.e., recFlag (OptIdx) =0, as shown in table 4. Otherwise, recFlag (OptIdx) is set to low intermediate frequency reception (during normal reception), i.e., recFlag (OptIdx) =1, as shown in table 4.
Step S4032, determining, according to a plurality of data segments divided by each frequency domain data group and the intermediate frequency bandwidth under each bandwidth option, an average power of a segment under each bandwidth option, which is centered on the intermediate frequency point in each data segment and is wide in the intermediate frequency band under each bandwidth option, in the plurality of frequency domain data groups.
Wherein the number of the plurality of data segments is equal to the number of the intermediate frequency points under each bandwidth option.
In the above embodiment, the number FmNum (2) of the intermediate frequency points at option2 is 3, so each frequency domain data set can be divided into 3 data segments, for example, (0, 1/3 x 1.7MHz ], (1/3 x 1.7MHz, 2/3 x 1.7MHz ], (2/3 x 1.7MHz, 1.7MHz ].
For step S4032, the determining the average power of the segment under each bandwidth option and with the intermediate frequency point in each data segment as the center and the intermediate frequency band under each bandwidth option as the width in the plurality of frequency domain data sets may include: determining an intermediate frequency point in each data segment according to a plurality of data segments formed by dividing each frequency domain data group; and determining the average power of the segments under each bandwidth option, which take the intermediate frequency point in each data segment as the center and the intermediate frequency band under each bandwidth option as the width, according to the plurality of data segments in each frequency domain data group, the intermediate frequency bandwidth under each bandwidth option and the intermediate frequency point in each data segment in the plurality of data segments.
Wherein, the determining the average power of the segment, which takes the intermediate frequency point in each data segment as the center and the intermediate frequency band in each bandwidth option as the width, under each bandwidth option may include: according to the firstlWithin a respective frequency domain data setkA sample dataR(l，k)Number of the plurality of frequency domain data setsLThe intermediate frequency bandwidth Bm (at least one bandwidth option)OptIdx) The first mentionedlDetermining the average power of the segments under each bandwidth option, which take the intermediate frequency point in each data segment as the center and the intermediate frequency band under each bandwidth option as the width, according to the intermediate frequency point fk (n) in the nth data segment in each frequency domain data group and the following formula,
wherein Bk = Bm: (OptIdx) (ii)/2, which represents Bm: (OptIdx) And/2, the number of occupied carriers.
Taking the above embodiment as an example, HPLC continuously transmits the preamble sequence using a specific frequency Band3 (e.g., 1.758-2.930 MHz shown in table 1), and HRF performs data reception using Option2 (e.g., 0.5MHz shown in table 2).
Dividing the obtained 3 data segments (0, 1/3 x 1.7 MHz) according to each frequency domain data segment]、（1/3*1.7MHz, 2/3*1.7MHz]、（2/3*1.7MHz, 1.7MHz]The intermediate frequency points (i.e. centers) fk (1), fk (2), fk (3) in each data segment can be determined respectively. Then, the data segments centered on fk (1), fk (2) and fk (3) and having Bm (b:) (b: (b)) are extracted from the 3 data segments2) =0.5MHz is the corresponding segment of the width.
If L =5 data sets are received, the data sets corresponding to the second data set can be extracted according to the above-mentioned mannerl（l=0, 1, 2, 3, 4) 3 segments within 3 data segments in a data group. Then, based on the frequency domain data in the segment corresponding to the 1 st data segment in each data groupR(l，k)（kThe value range of (1) is [ fk (1) -0.25MHz, fk (1) +0.25MHz]) And equation (2) above, the average power P (in) within the segment in the 1 st data segment can be determined2,1). In a similar manner to that described above, the average power within a segment, P, (2) in the 2 nd data segment may be determined22), average power P within a segment in the 3 rd data segment (2，3)。
Step S4033, when the average power of the segment in the multiple frequency domain data sets, which takes an intermediate frequency point in a bandwidth option as the center and the intermediate frequency band in the bandwidth option as the width, is the minimum, determine the intermediate frequency point as the optimal intermediate frequency point in the bandwidth option.
Specifically, P (b) is obtainedOptIdxN) index of minimum
If the optimal intermediate frequency point in Option2 is the intermediate frequency point fk (n) in the nth data segment (i.e. Fm: (n))2)=FmList(
)). For example, if P: (2And 3) is minimum, the intermediate frequency point fk (3) in the 3 rd data segment is the optimal intermediate frequency point under the Option2 (namely Fm: (3)2)=FmList(
)）。
If the traversal completes all Options, all estimated RecFlags are added (OptIdx)，Fm(OptIdx)，Bm(OptIdx) And reports to the main control module 20. If not, updatingOptIdxThe process returns to step S4031 to detect the next Option.
As shown in fig. 5, the configuration storage module 50 is a memory unit, and stores the optimal configurations of the HRFs in various bands and options. In the optimal configuration acquiring process, the main control module 20 stores the optimal configuration evaluated by the optimal detection module 40 in the configuration storage module 50. When the dual-mode system enters the normal operation mode, the main control module 20 searches the optimal receiving configuration from the configuration storage module 50 according to the configurations of the wired Band and the wireless Option. The storage format of the configuration storage module 50 for a given Band is shown in table 7. Since Band0 and Band3 start frequencies are close and Band0 and Band3 adopt one set of optimal results, a total of 3 sets of optimal configurations as shown in table 7 (i.e. Band0 and Band1, band2 and Band 3) are required for HPLC Band. When performing the optimal configuration, the main control module 20 determines the adopted optimal configuration table according to the Band of the HPLC, and then selects the Option corresponding to the optimal configuration from the table.
And 7, configuring a storage module storage format.
The optimum configuration acquisition process is briefly described below from the perspective of the master control module 20, as shown in fig. 6.
The main control module 20 performs Band configuration of HPLC on the HPLC channel module 10, and the specific configuration information refers to the above description of the HPLC channel module (as shown in table 3). After obtaining the configuration information, the main control module 20 controls the HPLC path module 10 to continuously transmit the preamble sequence with the designated Band (as shown in step S601).
The main control module 20 performs zero-if reception configuration on the HRF path module 30 according to the Band of the HPLC, and the specific configuration information refers to the description of the HRF path module 30 (as shown in table 4). After obtaining the configuration information, the main control module controls the HRF path module 30 to receive with zero intermediate frequency (as shown in step S602).
Under the configured Band condition, the optimal detection module 40 detects the optimal intermediate frequency point and the intermediate frequency bandwidth under all options (as shown in step S603).
The main control module 20 obtains the optimal if frequency point and if frequency bandwidth corresponding to the designated Band and different options, and notifies the configuration storage module 50 to store (as shown in step S604).
The optimum detection module 40 determines whether all bands have been traversed (as shown in step S605). If yes, the main control module 20 performs the next Band configuration on the HPLC path module 10, and circulates the above processes until detection under all Band conditions. Otherwise, the flow ends
Therefore, the main control module 20 determines the optimal receiving configuration under each Band and Option combination, and stores the optimal receiving configuration in the configuration storage module 50. The specific configuration information is described in the configuration storage module 50 (shown in table 7).
In the above embodiment, the optimal if and if bandwidth that can be used by the node device are determined in advance according to the bandwidths of the HPLC and the HRF, and the result is stored in the storage unit. Compared with the traditional receiving method of the fixed intermediate frequency point and the intermediate frequency bandwidth, the method can obtain the optimal receiving parameter setting in advance for the HPLC _ HRF equipment.
In summary, the present invention creatively transmits the preamble sequence in a specific frequency band by the HPLC path; receiving a plurality of data groups by an HRF path in a zero intermediate frequency mode, and transforming the received plurality of data groups to obtain a plurality of frequency domain data groups; and determining the optimal intermediate frequency point of the HRF under each bandwidth option in the low-intermediate frequency receiving process according to the cut-off frequency of the low-pass filter, the plurality of frequency domain data sets and the intermediate frequency bandwidth under each bandwidth option, so that the optimal intermediate frequency point in wireless communication can be configured according to the adopted wired and wireless bandwidths, the influence of the bandwidth and the out-of-band leakage of direct current and HPLC signals on the HRF can be effectively reduced, and the interference of the wired channel on the wireless channel can be reduced to the maximum extent.
Fig. 7 is a flowchart of a dual-mode communication method according to an embodiment of the present invention. As shown in fig. 7, the dual mode communication method may include: step S701, determining a specific optimal intermediate frequency point and a specific intermediate frequency bandwidth to be used by the HRF access from an optimal configuration table according to the specific frequency band to be used by the HPLC access and the specific bandwidth option to be used by the HRF access, where the optimal configuration table includes: the frequency band adopted by the HPLC channel and the bandwidth option and the intermediate frequency bandwidth adopted by the HRF channel correspond to the optimal intermediate frequency point determined by the method for determining the wireless receiving parameters; and a step S702 of performing communication by the HPLC path using the specific frequency band; and step S703, the HRF channel receives the data in a low-intermediate frequency mode by adopting the specific optimal intermediate frequency point and the specific intermediate frequency bandwidth.
Specifically, in the normal receiving process of the system, the main control module 20 determines the optimal receiving configuration of the HRF according to the Band and Option configuration of the dual mode, and configures the optimal receiving configuration to the corresponding module, and the specific processing manner is as follows.
The main control module 20 performs Band configuration on the HPLC channel module 10, and the specific configuration information refers to the description of the HPLC channel module 10 (as shown in table 3). After obtaining the configuration information, the HPLC path module 10 performs normal data transceiving processing according to the Band indication.
The main control module 20 reads the optimal receiving configuration of the HRF from the configuration storage module 50 according to the Option and the Band, and sends configuration information to the HRF path module 30, where the specific configuration information refers to the description of the HRF path module (as shown in table 4). After obtaining the configuration information, the HRF access module 30 performs normal data transceiving processing according to the Option and the optimal configuration information (the optimal if point and the corresponding if bandwidth) in the Band.
In summary, the present invention can creatively determine the optimal if frequency point and if bandwidth in wireless communication from the optimal configuration table according to the frequency band and the HRF bandwidth of HPLC, and in the process of HPLC channel adopting the frequency band communication, the HRF channel adopts the determined optimal if frequency point and if bandwidth to receive data in low if mode, so as to effectively reduce the influence of bandwidth and out-of-band leakage of direct current and HPLC signals on HRF, i.e. to reduce the interference of wired channel on wireless channel to the maximum extent.
An embodiment of the present invention provides a system for determining a wireless reception parameter, including: transmitting means for transmitting the preamble sequence in a specific frequency band by the HPLC path; receiving means, configured to receive multiple data groups in a zero intermediate frequency manner through an HRF path, and transform the received multiple data groups to obtain multiple frequency domain data groups, where in the zero intermediate frequency manner, a cutoff frequency of an adopted low-pass filter is a start frequency of the specific frequency band, and the data groups include interference signals of a reception process of the data groups by a transmission process of a preamble sequence; and an intermediate frequency point determining device, configured to determine, according to the cut-off frequency of the low-pass filter, the multiple frequency domain data sets, and the intermediate frequency bandwidth under each bandwidth option, an optimal intermediate frequency point under each bandwidth option in a low-intermediate frequency receiving process of the HRF channel.
The sending device may be the HPLC path module 10 in fig. 5, the receiving device may be the HRF path module 30 in fig. 5, and the intermediate frequency point determining device may be the optimal detecting module 40 in fig. 5. The transmitting device, the receiving device and the intermediate frequency point determining device can be controlled by a main control module 20.
Preferably, the intermediate frequency point determining device includes: the number determining module is used for determining the number of the intermediate frequency points under each bandwidth option according to the cut-off frequency of the low-pass filter and the intermediate frequency bandwidth under each bandwidth option; the power determining module is used for determining the average power of the segments which are divided into a plurality of data segments by each frequency domain data group and the intermediate frequency bandwidth under each bandwidth option and take the intermediate frequency point in each data segment as the center and the intermediate frequency bandwidth under each bandwidth option as the width under each bandwidth option in the plurality of frequency domain data groups, wherein the number of the plurality of data segments is equal to the number of the intermediate frequency points under each bandwidth option; and the intermediate frequency point determining module is used for determining the intermediate frequency point as the optimal intermediate frequency point under a bandwidth option under the condition that the average power of the segments which take the intermediate frequency point under the bandwidth option as the center and the intermediate frequency band under the bandwidth option as the width in the plurality of frequency domain data groups is the minimum value.
Preferably, the power determining module comprises: the intermediate frequency point determining unit is used for determining the intermediate frequency point in each data segment according to a plurality of data segments formed by dividing each frequency domain data group; and a power determining unit, configured to determine, according to the multiple data segments in each frequency domain data group, the intermediate frequency bandwidth in each bandwidth option, and the intermediate frequency point in each data segment in the multiple data segments, an average power of a segment, which is centered on the intermediate frequency point in each data segment and is wide in the intermediate frequency band in each bandwidth option, in each bandwidth option.
For details and advantages of the system for determining wireless receiving parameters provided by the present invention, reference may be made to the above description of the method for determining wireless receiving parameters, which is not described herein again.
An embodiment of the present invention provides a dual mode communication system, including: a parameter determining device, configured to determine, according to a specific frequency band to be used by an HPLC channel and a specific bandwidth option to be used by an HRF channel, a specific optimal intermediate frequency point and a specific intermediate frequency bandwidth to be used by the HRF channel from an optimal configuration table, where the optimal configuration table includes: the frequency band adopted by the HPLC channel and the bandwidth option and the intermediate frequency bandwidth adopted by the HRF channel correspond to the optimal intermediate frequency point determined by the method for determining the wireless receiving parameters; and a first communication module for communicating by the HPLC path using the specific frequency band; and a second communication module, configured to receive, by the HRF path, the specific optimal intermediate frequency point and the specific intermediate frequency bandwidth in a low-intermediate frequency manner.
For specific details and benefits of the dual-mode communication system provided by the present invention, reference may be made to the above description for the dual-mode communication method, which is not described herein again.
An embodiment of the present invention provides a chip, configured to execute an instruction, where the instruction is executed by the chip to implement the method for determining a wireless receiving parameter and/or the method for dual-mode communication.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
Those skilled in the art can understand that all or part of the steps in the method according to the above embodiments may be implemented by a program, which is stored in a storage medium and includes several instructions to enable a single chip, a chip, or a processor (processor) to perform all or part of the steps in the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In addition, any combination of the various embodiments of the present invention can be made, and the same should be considered as the disclosure of the present invention as long as the idea of the present invention is not violated.
Claims (10)
1. A method for determining wireless reception parameters, the method comprising:
transmitting a preamble sequence in a specific frequency band by a high-speed power line carrier communication (HPLC) path;
receiving a plurality of data groups by a high-speed wireless communication HRF path in a zero intermediate frequency mode, and transforming the received data groups to obtain a plurality of frequency domain data groups, wherein in the zero intermediate frequency mode, a cut-off frequency of an adopted low-pass filter is a starting frequency of the specific frequency band, and the data groups comprise interference signals of a preamble sequence in a receiving process of the data groups; and
and determining the optimal intermediate frequency point of the HRF under each bandwidth option in the process of receiving in a low-intermediate frequency mode according to the cut-off frequency of the low-pass filter, the plurality of frequency domain data sets and the intermediate frequency bandwidth under each bandwidth option.
2. The method of claim 1, wherein the determining the optimal if frequency point of the HRF path at each bandwidth option during reception in low if mode comprises:
determining the number of the intermediate frequency points under each bandwidth option according to the cut-off frequency of the low-pass filter and the intermediate frequency bandwidth under each bandwidth option;
determining the average power of a segment which is divided into a plurality of data segments by each frequency domain data group and has the intermediate frequency point in each data segment as the center and the intermediate frequency band under each bandwidth option as the width under each bandwidth option in the plurality of frequency domain data groups according to the plurality of data segments which are divided by each frequency domain data group and the intermediate frequency bandwidth under each bandwidth option, wherein the number of the plurality of data segments is equal to the number of the intermediate frequency points under each bandwidth option; and
and under the condition that the average power of the segments which take an intermediate frequency point as the center and an intermediate frequency band under a bandwidth option as the width in the plurality of frequency domain data groups is the minimum value, determining the intermediate frequency point as the optimal intermediate frequency point under the bandwidth option.
3. The method of claim 2, wherein the determining the average power of the segments under each bandwidth option, which are centered around the if frequency point in each data segment and are wide in the if frequency band under each bandwidth option, in the plurality of frequency domain data sets comprises:
determining intermediate frequency points in each data segment according to a plurality of data segments formed by dividing each frequency domain data group; and
and determining the average power of the segments under each bandwidth option, which are centered at the intermediate frequency point in each data segment and are wide at the intermediate frequency band under each bandwidth option, according to the plurality of data segments in each frequency domain data group, the intermediate frequency bandwidth under each bandwidth option and the intermediate frequency point in each data segment in the plurality of data segments.
4. The method according to claim 3, wherein the determining the average power of the segment under each bandwidth option, which is centered on the intermediate frequency point in each data segment and is wide in the intermediate frequency band under each bandwidth option, comprises:
according to the firstlWithin a frequency domain data setkA sample dataR(l，k)Number of the plurality of frequency domain data setsLThe intermediate frequency bandwidth Bm (at each bandwidth option)OptIdx) The first mentionedlDetermining the average power of the segments under each bandwidth option, which take the intermediate frequency point in each data segment as the center and the intermediate frequency band under each bandwidth option as the width, according to the intermediate frequency point fk (n) in the nth data segment in each frequency domain data group and the following formula,
wherein Bk = Bm: (OptIdx)/2。
5. A dual-mode communication method, the dual-mode communication method comprising:
determining a specific optimal intermediate frequency point and a specific intermediate frequency bandwidth to be adopted by a high-speed wireless communication HRF (high speed radio frequency) channel from an optimal configuration table according to a specific frequency band to be adopted by the high-speed power line carrier communication HPLC channel and a specific bandwidth option to be adopted by the high-speed wireless communication HRF channel, wherein the optimal configuration table comprises: the frequency band adopted by the HPLC channel and the bandwidth options and the intermediate frequency bandwidth adopted by the HRF channel correspond to the optimal intermediate frequency points determined by the method for determining wireless reception parameters according to any one of claims 1 to 4; and
communicating by the HPLC pathway using the particular frequency band; and
and the HRF channel receives the signals in a low-intermediate frequency mode by adopting the specific optimal intermediate frequency point and the specific intermediate frequency bandwidth.
6. A system for determining wireless reception parameters, the system comprising:
transmitting means for transmitting the preamble sequence in a specific frequency band by a high-speed power line carrier communication (HPLC) path;
receiving means, configured to receive multiple data sets in a zero-intermediate-frequency manner through a high-speed wireless communication HRF path, and transform the received multiple data sets to obtain multiple frequency-domain data sets, where in the zero-intermediate-frequency manner, a cut-off frequency of an adopted low-pass filter is a start frequency of the specific frequency band, and the data sets include interference signals of a preamble sequence transmission process on the data sets; and
and the intermediate frequency point determining device is used for determining the optimal intermediate frequency point of the HRF channel under each bandwidth option in the receiving process in a low-intermediate frequency mode according to the cut-off frequency of the low-pass filter, the plurality of frequency domain data sets and the intermediate frequency bandwidth under each bandwidth option.
7. The system for determining wireless receiving parameters of claim 6, wherein the device for determining intermediate frequency points comprises:
the number determining module is used for determining the number of the intermediate frequency points under each bandwidth option according to the cut-off frequency of the low-pass filter and the intermediate frequency bandwidth under each bandwidth option;
the power determining module is used for determining the average power of the segments which are divided into a plurality of data segments by each frequency domain data group and the intermediate frequency bandwidth under each bandwidth option and take the intermediate frequency point in each data segment as the center and the intermediate frequency bandwidth under each bandwidth option as the width under each bandwidth option in the plurality of frequency domain data groups, wherein the number of the plurality of data segments is equal to the number of the intermediate frequency points under each bandwidth option; and
and the intermediate frequency point determining module is used for determining the intermediate frequency point as the optimal intermediate frequency point under a bandwidth option under the condition that the average power of the segments which take the intermediate frequency point under the bandwidth option as the center and the intermediate frequency band under the bandwidth option as the width in the plurality of frequency domain data groups is the minimum value.
8. The system of claim 7, wherein the power determination module comprises:
the intermediate frequency point determining unit is used for determining the intermediate frequency point in each data segment according to a plurality of data segments formed by dividing each frequency domain data group; and
and a power determining unit, configured to determine, according to the multiple data segments in each frequency domain data group, the intermediate frequency bandwidth in each bandwidth option, and the intermediate frequency point in each data segment in the multiple data segments, an average power of a segment in each bandwidth option, where the segment is centered at the intermediate frequency point in each data segment and the segment is wide at the intermediate frequency band in each bandwidth option.
9. A dual-mode communication system, the dual-mode communication system comprising:
the parameter determining device is used for determining a specific optimal intermediate frequency point and a specific intermediate frequency bandwidth to be adopted by a high-speed wireless communication HRF (high-performance radio frequency) channel from an optimal configuration table according to a specific frequency band to be adopted by the high-speed power line carrier communication HPLC (high performance liquid chromatography) channel and a specific bandwidth option to be adopted by the high-speed wireless communication HRF channel, wherein the optimal configuration table comprises: the frequency band adopted by the HPLC channel and the bandwidth options and the intermediate frequency bandwidth adopted by the HRF channel correspond to the optimal intermediate frequency points determined by the method for determining wireless reception parameters according to any one of claims 1 to 4; and
a first communication module for communicating by the HPLC path using the specific frequency band; and
and the second communication module is used for receiving the specific optimal intermediate frequency point and the specific intermediate frequency bandwidth in a low-intermediate frequency mode through the HRF.
10. A chip for executing instructions which, when executed by said chip, implement the method for determining radio reception parameters according to any of claims 1 to 4 and/or the dual-mode communication method according to claim 5.
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Address after: 100192 building 3, A District, Dongsheng science and Technology Park, Zhongguancun, 66 Haidian District West Road, Beijing. Patentee after: BEIJING SMARTCHIP MICROELECTRONICS TECHNOLOGY Co.,Ltd. Patentee after: Qingdao Zhixin Semiconductor Technology Co.,Ltd. Patentee after: STATE GRID ZHEJIANG ELECTRIC POWER Co.,Ltd. Patentee after: INFORMATION AND COMMUNICATION BRANCH, STATE GRID ZHEJIANG ELECTRIC POWER Co.,Ltd. Address before: 100192 building 3, A District, Dongsheng science and Technology Park, Zhongguancun, 66 Haidian District West Road, Beijing. Patentee before: BEIJING SMARTCHIP MICROELECTRONICS TECHNOLOGY Co.,Ltd. Patentee before: State Grid Sigi Ziguang (Qingdao) Microelectronics Technology Co.,Ltd. Patentee before: STATE GRID ZHEJIANG ELECTRIC POWER Co.,Ltd. Patentee before: INFORMATION AND COMMUNICATION BRANCH, STATE GRID ZHEJIANG ELECTRIC POWER Co.,Ltd. |
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