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A Doppler Diversity Receiving Method and Device Based on Matched Filtering

A matched filtering and diversity receiving technology, applied in frequency diversity, space transmit diversity, diversity/multi-antenna systems, etc., can solve the problems of performance limit and inability to fully and effectively use diversity resources, etc., to reduce performance loss and calculation times , the effect of multi-diversity gain

Active Publication Date: 2022-05-27
HANGZHOU DIANZI UNIV
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Problems solved by technology

However, in the traditional Doppler diversity reception structure, the system obtains diversity gain by shifting the frequency spectrum of the received signal, but this method cannot fully and effectively utilize the diversity resources brought about by frequency offset, and there are certain performance limit

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  • A Doppler Diversity Receiving Method and Device Based on Matched Filtering
  • A Doppler Diversity Receiving Method and Device Based on Matched Filtering
  • A Doppler Diversity Receiving Method and Device Based on Matched Filtering

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Embodiment Construction

[0062] The following preferred embodiments further illustrate the technical solutions provided by the present invention, but should not be construed as limiting the invention.

[0063] like Figure 1-2 As shown, a Doppler diversity receiving method based on matched filtering of the present invention specifically includes the following steps:

[0064] Step 1: The M base stations first perform precoding on the transmitted signal, and perform an oversampling operation with a sampling rate of α. Assuming that the synchronization position of the receiver is aligned with the signal received from the first base station, let the received signal in the mobile station be x(n).

[0065] Step 2: The received signal enters a simplified Doppler diversity receiving structure. The mobile station first performs The frequency shift operation of , the i-th signal after different frequency shifts can be expressed as

[0066]

[0067] Among them, 0≤n≤N-1, 0≤i≤N-1, is the estimated Dopple...

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Abstract

The invention discloses a method and device for receiving Doppler diversity based on matched filtering. The method of the invention includes: step 1: in a multi-antenna system, the base station precodes the transmitted signal and performs an oversampling operation; step 2: The received signal enters the simplified Doppler diversity receiving structure, and then the mobile station performs different frequency shift processing on the received signal to obtain the signal on the diversity branch; Processing, desampling the signal; Step 4: Use the maximum ratio combination method to perform weighted combination of different branches, perform FFT transformation after serial-to-parallel conversion, and obtain the output signal through parallel-to-serial conversion; Step 5: Simplified Doppler diversity After receiving the structure, the mobile station performs a decoding operation on the output signal through the estimated channel parameters, and performs a decision output. The invention reduces the performance loss caused by Doppler expansion and improves the system performance.

Description

technical field [0001] The invention belongs to the technical field of design of a receiving system in a high-speed mobile environment, and particularly relates to a Doppler diversity receiving method and device based on matched filtering. Background technique [0002] In the high-speed mobile communication system, the Doppler effect brought by the high mobility of the vehicle will greatly reduce the signal detection quality of the system, thus seriously affecting the transmission reliability of the communication system. Due to the influence of the Doppler frequency shift, the system performance is seriously degraded. Therefore, the receiving end needs to estimate and compensate the frequency offset of the signal before decoding. By estimating and compensating the Doppler frequency shift, it can resist multiple Puller effect. In general, the frequency offset in a communication system is mainly caused by the following factors: phase noise (Phase noise, PN), carrier frequency...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/08H04B7/12
CPCH04B7/08H04B7/12
Inventor 曾嵘邵智敏杭潇易志强
Owner HANGZHOU DIANZI UNIV
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