Vector rotary timed error detector and its method for obtaining timed error signals

Abstract

The invention provides a vector rotation type timing error detector, which includes a sequentially connected sampling point selection module, an analysis filter, a correlator and an accumulator, and also includes a sequentially connected first multiplier, a second accumulator, and a second multiplier The device and the real module also include a conjugate module, the input terminal of the first multiplier is connected with the output terminal of the correlator, and the input terminal of the second multiplier is connected with the accumulator through the conjugate module The detector is connected to the output terminal of the detector, and the detector uses the sampled value at the punctual moment to lead the sampled value of the lagging arm, and uses the sampled value to obtain a timing error signal. The invention provides a timing error detector with simple structure and hardware circuit and good performance. The method for obtaining a timing error signal by using the timing error detector has the advantages of less sampling times, less computation, and higher signal-to-noise ratio of the output timing error signal.

Description

technical field [0001] The invention relates to a vector rotation type timing error detector and a method for obtaining a timing error signal, in particular to a detector which uses a vector rotation module to replace the related equipment of the advanced forearm and the lagging arm in the traditional non-coherent detector, and utilizes The sampling value at the punctual moment indirectly constructs the sampling value of the leading arm and the lagging arm or the leading lagging arm, and uses the sampling value to obtain a timing error signal. Background technique [0002] In a multi-carrier code division multiple access (MC-CDMA) system, in order to correctly demodulate the quaternary phase-shift keying (QPSK) signal sent by the sending end, it is necessary to go through the acquisition stage first to make the local pseudo-random sequence (PN code) and The received pseudo-random sequence (PN code) is basically synchronized, and then the sampling time is adjusted through the...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a vector rotation type timing error detector and its method for obtaining timing error signals for the current traditional non-coherent detectors with complex hardware circuits and algorithms, low detection performance and insufficient resource utilization. method, the vector rotation type timing error detector uses a vector rotation module to replace the related equipment of the lead arm and the lag arm in the traditional non-coherent detector, and uses the sampling value at the punctual moment to indirectly construct the sample value of the lead arm and the lag arm or the lead lag arm , and further use the sampling value to obtain the timing error signal

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