Construction method of multi-carrier Faster-Than-Nyquist system receiver

Abstract

According to a construction method of a multi-carrier Faster-Than-Nyquist receiver, the ill-conditioned problem of an MFTN system can be effectively solved, meanwhile, the color noise problem of the MFTN system is solved, the time domain and frequency domain joint channel estimation and equalization problem of the MFTN system under an unknown channel and time domain and frequency domain signal equalization of the MFTN system under a known channel are achieved, and the calculation complexity is low. According to two-dimensional coupling interference characteristics in the MFTN system, a receiving signal model with a cyclic equivalent channel matrix is constructed by inserting a proper amount of two-dimensional cyclic suffixes, and the ill-conditioned problem of the MFTN system is effectively improved; in a time domain receiver and a frequency domain receiver, a color noise processing method based on a weighted unit matrix and a two-dimensional FFT is adopted, so that the time domain and frequency domain joint channel estimation and equalization problem of the MFTN system under an unknown channel and the time domain and frequency domain signal equalization problem of the MFTN system under a known channel are effectively solved.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method for constructing a multi-carrier super-Nyquist system receiver. Background technique [0002] In recent years, in the application scenarios of limited spectrum resources, Faster-Than-Nyquist (FTN) signals with high channel capacity have attracted extensive attention in the field of wireless communication. FTN signal is an effective implementation of non-orthogonal waveforms, and it is easy to combine multiple-input multiple-output (MIMO). By reducing the Nyquist interval of time-domain shaped pulses, it can significantly Improve the frequency band efficiency of the communication system. On the basis of the research on single-carrier FTN signals, the concept of FTN is extended to multi-carrier systems, including one-dimensional frequency domain compressed high spectral efficiency frequency division multiplexing (Spectrally Efficient Frequency Division Mult...

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Problems solved by technology

[0011] In order to solve the above-mentioned existing problems, the present invention proposes a construction method of a multi-carrier super-Nyquist system receiver, which can effectively improve the ill-conditioned problems of the MFTN system At the same time, the color noise problem of the MFTN system is dealt with, and the time-frequency domain joint channel estimation and equalization problem of the MFTN system under the unknown channel and the time-frequency domain signal equalization of the MFTN system under the known channel are realized, and the computational complexity is low

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