CN1941677A - Doppler carrier shift emulator for high-dynamic mobile telecommunication channel - Google Patents
Doppler carrier shift emulator for high-dynamic mobile telecommunication channel Download PDFInfo
- Publication number
- CN1941677A CN1941677A CNA2005101057703A CN200510105770A CN1941677A CN 1941677 A CN1941677 A CN 1941677A CN A2005101057703 A CNA2005101057703 A CN A2005101057703A CN 200510105770 A CN200510105770 A CN 200510105770A CN 1941677 A CN1941677 A CN 1941677A
- Authority
- CN
- China
- Prior art keywords
- frequency
- signal
- emulator
- mobile telecommunication
- doppler
- 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.)
- Pending
Links
Images
Landscapes
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
The invention is concerned with the achieving project of the high dynamic mobile communication channel Doppler frequency-shift simulator, the project solves the Doppler frequency-shift simulating problem of the signal transmission at the high dynamic environment by the signal processing technology such as the time frequency domain transform, the interpolation fitting, the sampling.
Description
Technical field
The present invention relates to simulation technical field, in particular, is mobile telecommunication channel Doppler carrier shift emulator under a kind of high dynamic environment.
Background technology
The Doppler frequency shift that the signal transmission causes under the high dynamic environment mainly shows both ways the influence of signal: centre frequency is moved with signal bandwidth and is changed.Move and to solve by mixing and DDS technology for centre frequency.Signal bandwidth changes current main utilization change signal code speed and comes approximate simulation, and there are two deficiencies in this method: the one, and only be adapted at the signal source end and realize, be difficult to the signal that has produced is arbitrarily handled; The 2nd, to the signal form of some complex modulation, the signal code rate variation can not reflect the influence of Doppler to signal bandwidth fully.
Summary of the invention
A kind of high-dynamic mobile telecommunication channel Doppler frequency shift modeling scheme that The present invention be directed to the shortcoming of existing Doppler frequency shift analogue technique existence and propose based on signal processing technologies such as time-frequency domain conversation, interpolation fitting and sampling, its analog capability is strong, realizes simple.
The present invention is achieved through the following technical solutions:
A kind of Doppler carrier shift emulator for high-dynamic mobile telecommunication channel comprises five parts: Signal Pretreatment unit, interpolation fitting unit, time-frequency conversion unit, sampling of data unit, time-frequency inverse transformation block.
Below the invention will be further described, be described below:
1. Signal Pretreatment unit
Work such as analog to digital conversion (A/D), string and conversion, level conversion are finished in the Signal Pretreatment unit, for the subsequent treatment unit provides suitable data.
2. interpolation fitting unit
The interpolation fitting unit increases or reduces the sampling rate of data and simulates the influence of Doppler frequency shift to signal by interpolation.The sampling rate of this unit dateout is:
3. time-frequency conversion unit
The time-frequency conversion unit transforms from the time domain to frequency domain by operations such as data padding, fast Fourier transform (FFT)s with data.
4. sampling of data unit
Sample to data at frequency domain in the sampling of data unit, it is consistent to make data length and interpolation fit unit input data length.
5. time-frequency inverse transformation block
The time-frequency inverse transformation block utilize invert fast fourier transformation (IFFT) with data from the frequency domain transform to the time domain, obtain the signal behind Doppler frequency shift.
The present invention has following remarkable advantage:
1. the Doppler frequency shift analog capability is strong, is applicable to the arbitrary signal form;
2. easy to use, can insert in the signal communication link, and need not signal source or receiver are done any change;
3. each unit all adopts existing mature technology, realizes simple and convenient.
Description of drawings
Fig. 1 is a Doppler carrier shift emulator for high-dynamic mobile telecommunication channel structure chart of the present invention;
Fig. 2 is signal spectrum figure behind the input signal of the specific embodiment of the invention and the Doppler frequency shift.
Specific embodiment
Below in conjunction with the drawings and specific embodiments the present invention is further introduced, but not as a limitation of the invention.
Suppose that input signal is a pulse-modulated signal, signal center frequency is 1MHz, and pulse duration is 0.0067ms.Utilize the present invention that this signal is carried out Doppler frequency shift, be-15kHz in the Doppler frequency shift value of center frequency points.
Referring to Fig. 1, sample to input signal in the Signal Pretreatment unit, and sampling rate is 3Msps, and sampling number is 1024.Utilize the interpolation fitting unit that sampled data is carried out cubic spline interpolation, obtain 1039 data, data sampling rate becomes 3.0467Msps.The time-frequency conversion unit is to the data zero padding, and does 2048 FFT computings, obtains frequency domain data.Utilize sampling unit that these data are carried out 1/2 sampling, obtain 1024 frequency domain datas.Carry out 1024 IFFT computings then, obtain through the signal behind the Doppler frequency shift.
Fig. 2 has provided signal spectrum figure behind the input signal of the specific embodiment of the invention and the Doppler frequency shift.Signal center frequency behind the Doppler frequency shift is 985kHz in theory, and the output signal centre frequency is 985.352kHz after the present invention handles; Signal three dB bandwidth is 167.373Hz behind the Doppler frequency shift in theory, and output signal three dB bandwidth is 166.992Hz after the present invention handles.
Specific embodiment of the present invention has been done detailed explanation to the content of invention.For one of ordinary skill in the art, any conspicuous change that it is done all constitutes to infringement of patent right of the present invention, with corresponding legal responsibilities without departing from the premise in the spirit of the present invention.
Claims (3)
1. a Doppler carrier shift emulator for high-dynamic mobile telecommunication channel comprises five parts: Signal Pretreatment unit, interpolation fitting unit, time-frequency conversion unit, sampling of data unit, time-frequency inverse transformation block.
2. a kind of Doppler carrier shift emulator for high-dynamic mobile telecommunication channel as claimed in claim 1 is characterized in that: utilize the time-frequency domain sample frequency to change and come the analog signal Doppler frequency shift.
3. a kind of Doppler carrier shift emulator for high-dynamic mobile telecommunication channel as claimed in claim 1 is characterized in that: utilize interpolation fitting and sampling techniques to change the data sampling frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005101057703A CN1941677A (en) | 2005-09-29 | 2005-09-29 | Doppler carrier shift emulator for high-dynamic mobile telecommunication channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005101057703A CN1941677A (en) | 2005-09-29 | 2005-09-29 | Doppler carrier shift emulator for high-dynamic mobile telecommunication channel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1941677A true CN1941677A (en) | 2007-04-04 |
Family
ID=37959499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2005101057703A Pending CN1941677A (en) | 2005-09-29 | 2005-09-29 | Doppler carrier shift emulator for high-dynamic mobile telecommunication channel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1941677A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102447518A (en) * | 2011-11-10 | 2012-05-09 | 北京临近空间飞行器***工程研究所 | Signal channel comprehensive processing method used under near space hypersonic velocity condition |
| CN107888281A (en) * | 2017-11-08 | 2018-04-06 | 西安电子科技大学 | A kind of high dynamic optic communication Simulation Doppler Frequency-Shift system |
| CN108322299A (en) * | 2018-01-10 | 2018-07-24 | 北京哨兵科技有限公司 | A kind of inclined analog signal generating method of code and device |
| CN110472303A (en) * | 2019-07-26 | 2019-11-19 | 中国科学院长春光学精密机械与物理研究所 | A kind of space optical camera imaging link simulation method and its system |
| CN112333757A (en) * | 2020-10-15 | 2021-02-05 | 成都市以太节点科技有限公司 | Wireless communication test method and system |
-
2005
- 2005-09-29 CN CNA2005101057703A patent/CN1941677A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102447518A (en) * | 2011-11-10 | 2012-05-09 | 北京临近空间飞行器***工程研究所 | Signal channel comprehensive processing method used under near space hypersonic velocity condition |
| CN107888281A (en) * | 2017-11-08 | 2018-04-06 | 西安电子科技大学 | A kind of high dynamic optic communication Simulation Doppler Frequency-Shift system |
| CN107888281B (en) * | 2017-11-08 | 2020-04-14 | 西安电子科技大学 | High-dynamic optical communication Doppler frequency shift simulation system |
| CN108322299A (en) * | 2018-01-10 | 2018-07-24 | 北京哨兵科技有限公司 | A kind of inclined analog signal generating method of code and device |
| CN110472303A (en) * | 2019-07-26 | 2019-11-19 | 中国科学院长春光学精密机械与物理研究所 | A kind of space optical camera imaging link simulation method and its system |
| CN112333757A (en) * | 2020-10-15 | 2021-02-05 | 成都市以太节点科技有限公司 | Wireless communication test method and system |
| CN112333757B (en) * | 2020-10-15 | 2022-11-08 | 成都市以太节点科技有限公司 | Wireless communication test method and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1941677A (en) | Doppler carrier shift emulator for high-dynamic mobile telecommunication channel | |
| CN100502378C (en) | Circuit and method of peak-to-average ratio suppression in OFDM system | |
| RU2011104198A (en) | METHODS AND SYSTEMS FOR REDUCING THE PAPR OFDM SIGNAL | |
| Sudha et al. | Low complexity PAPR reduction in SLM-OFDM system using time domain sequence separation | |
| CN1531293A (en) | Method for decreasing peak average power rate | |
| CN109061634A (en) | The Design of Signal method of OFDM radar-communication integration Mini-Unmanned Aerial Vehicles | |
| CN1152493C (en) | Method for inhibiting peak-to-average ratio in orthogonal frequency division complex communication system | |
| CN1575573A (en) | Data transmission method for multicarrier modulation | |
| CA2379617A1 (en) | Methods, systems and devices for generating pulse shapes | |
| CN107704656A (en) | The design and implementation methods for being parameterized into mode filter based on FPGA | |
| Oyekanlu et al. | Advanced Signal Processing for Communication Networks and Industrial IoT Machines Using Low-Cost Fixed-Point Digital Signal Processor | |
| CN1750014A (en) | Simulation realizing method for A/D converter | |
| Krongold et al. | A new method for PAR reduction in baseband DMT systems | |
| CN107451096B (en) | FPGA signal processing method of high throughput rate FFT/IFFT | |
| Tiwari et al. | FPGA implementation of FFT blocks for OFDM | |
| CN1152495C (en) | Digital shaping filter in WCDMA communication system | |
| CN1433169A (en) | Partial transmission sequence method based on minimal non-linear noise for orthogonal frequency-division multiplexing system | |
| CN104483546A (en) | Spectrum analysis method of FPGA (Field Programmable Gate Array) digital logic signal | |
| CN104734725A (en) | Self-adaptive sampling recovery method based on FRI | |
| Tellado et al. | Further results on peak-to-average ratio reduction | |
| CN110808935B (en) | Accurate and efficient implementation method and device for autocorrelation operation of linear frequency modulation signal | |
| Liu et al. | Signal to Noise Ratio Improvement Scheme for OFDM System Based on Wavelet Transform | |
| CN1996979A (en) | Restraint method based on the window function weight PAPR | |
| CN101064704A (en) | Multi-frequency point OFDM signal frequency converting method and apparatus | |
| CN105608052A (en) | Polyphase decomposition based variable point number fast Fourier transform method for GHz high-speed sampling signal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20070404 |