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Multi-path selecting method and receiver

A multi-path selection and receiver technology, applied in the field of communication, can solve the problems of weak energy, unable to detect multi-path, unable to accurately search for multi-path, etc., to avoid capacity loss, easy calculation method, and take into account the demodulation performance effect

Inactive Publication Date: 2007-11-14
ZTE CORP
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  • Claims
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AI Technical Summary

Problems solved by technology

Although this method can effectively shield sidelobe false paths, it will cause weaker energy multipaths to be undetectable
[0006] In short, the existing methods cannot ensure that weaker multipaths can be accurately searched while shielding sidelobe false paths, and need to be improved

Method used

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Embodiment Construction

[0023] The specific implementation manners of the present invention will be described in detail below with reference to the accompanying drawings.

[0024] Referring to FIG. 2, a rake receiver according to an embodiment of the present invention is illustrated. As shown in FIG. 2 , the rake receiver includes: a multipath searcher 202 , a path combiner 204 , and a demodulator 206 . The baseband signals are sent to the multipath searcher and M demodulators respectively. The multipath searcher uses the local scrambling code to carry out matching correlation integration of different time delays on the baseband signal, find out the time delay of each multipath, and provide them to each demodulator respectively. The demodulator demodulates the data according to the obtained time delay of each path, and sends the demodulated result to the path combiner for combination, and then outputs it.

[0025] As shown in FIG. 3 , the multipath searcher 202 according to the embodiment of the pr...

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Abstract

The invention relates to a multi-path selection method and receiver thereof. The receiver comprises multi-path searcher for conducting different delay matching relative integration adopting local interference code and providing respectively each multi-path delay to at least a demodulator, at least a demodulator for conducting data demodulating according to the multi-path delay from the multi-path searcher and sending the modulation result to the path combiner, a path combiner for combining paths and out-putting the result. The invention can effectively shield false path resulted by peak side lobe so as to avoid capacity loss resulted by false path participating demodulation system.

Description

technical field [0001] The present invention relates to the communication field, and more specifically relates to a multipath selection method and a receiver. Background technique [0002] In the direct spread spectrum code division multiple access system, the wireless receiving end uses the correlation of the chip sequence to restore the information symbol. At present, the pilot signal in the dedicated physical control channel is usually used to estimate the multipath delay. A correlation function is obtained by correlating the received baseband signal with known scrambling codes and pilot signals with different time delays. When the correlation delay is the same as the path delay, a peak will appear in the correlation function, and the correlation function will be symmetrical with respect to the peak. The time delay corresponding to finding the peak value in the correlation function waveform is the time delay of each path. [0003] As shown in Figure 1, the waveform of t...

Claims

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Application Information

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IPC IPC(8): H04B1/707H04B1/10H04J13/02H04B1/7113H04B1/7115
Inventor 徐海燕
Owner ZTE CORP
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