Phase interleaved bpsk modulation method between modulation symbols

Abstract

The invention discloses a phase-staggered BPSK modulation method between modulation symbols and aims at providing a modulation method with a low demodulation threshold so that the 180-degree phase jump can be avoided and the peak-to-average ratio of the modulation signal can be reduced. The method is characterized in that a modulator generates a reference phase sequence being consistent with the length of the modulation data according to the length of to-be-modulated data in a communication system; according to the to-be-modulated data and the reference phase sequence, a carrier phase corresponding to current reach modulation symbol is calculated; BPSK signal modulation is performed according to the calculation results, wherein carrier phases of modulation data '1' and modulation data 0 degree are a reference phase corresponding to the current modulation symbol and a value of the reference phase plus / minus 180 degrees respectively in the current modulation symbol; after completion of one symbol, whether the data are modulated completely is determined; and if so, current data modulation is ended; and otherwise, a carrier phase corresponding to a next modulation symbol is calculatedagain until modulation completion.

Description

technical field [0001] The invention relates to the field of communication system signal processing, in particular to a BPSK modulation method for phase-staggered binary phase-shift keying between modulation symbols that reduces the peak-to-average ratio of modulation signals. Background technique [0002] In a wireless communication system, baseband signals need to be modulated into modulation symbols with amplitude and phase information, and then reach the receiving end through a wireless channel. In the field of mobile communication, with the continuous increase of the amount of communication information, the bandwidth required by the communication system is getting wider and wider, and the frequency resources are becoming increasingly tight. In order to solve the contradiction of limited bandwidth, on the one hand, the communication frequency band is continuously extended to higher frequencies, and on the other hand, continuous efforts are made to improve the utilization...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problem that there is a 180° phase jump in BPSK modulation in the prior art, which leads to large fluctuations in the signal envelope and a large peak-to-average ratio of the corresponding signal. °Phase hopping, a phase-interleaved BPSK modulation method between modulation symbols that can reduce the peak-to-average ratio of modulation signals

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