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MFTN joint channel estimation and equalization method under time-varying frequency selective fading channel

A technology of joint channel estimation and fading channel, which is applied in the field of MFTN joint channel estimation and equalization under time-variant frequency selective fading channel, and can solve problems such as interference elimination.

Active Publication Date: 2021-09-10
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0008] In order to solve the above-mentioned existing problems, the present invention proposes a MFTN joint channel estimation and equalization method under a time-varying frequency selective fading channel, which can solve the complex channel estimation and strong coupling interference elimination problems of the MFTN system under a time-varying frequency selective fading channel

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  • MFTN joint channel estimation and equalization method under time-varying frequency selective fading channel
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  • MFTN joint channel estimation and equalization method under time-varying frequency selective fading channel

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[0131] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0132] The present invention proposes a MFTN joint channel estimation and equalization method for time-variable frequency-selective fading channels. First, a small amount of one-dimensional frequency-domain cyclic suffixes are introduced into the transmitter, and time-domain segment detection is performed on the signal in the receiver. By truncating the two-dimensional self-interference length, a segmented frequency-domain receiving signal model of the MFTN system under time-variable frequency-selective fading channels is constructed. The model has an equivalent channel matrix, which has a block cyclic structure and each cyclic block is The angle matrix can effectively reduce the condition number of the equivalent channel matrix, thereby reducing the impact of the ill-conditioned problem introduced by time-frequency two-dimensional compression on the receiv...

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Abstract

The invention provides an MFTN joint channel estimation and equalization method under a time-varying frequency selective fading channel. The problems of complex channel estimation and strong coupling interference elimination of an MFTN system under the time-varying frequency selective fading channel can be solved. A small number of one-dimensional frequency domain cyclic postfixes are inserted, time domain segmentation detection is carried out on signals in a receiver, the two-dimensional self-interference length is truncated, a segmentation frequency domain receiving signal model of an MFTN system under a time-varying frequency selective fading channel is constructed, and the model has an equivalent channel matrix. The equivalent channel matrix has a block cyclic structure and each cyclic block is a diagonal matrix, so that the condition number of the equivalent channel matrix can be effectively reduced, the influence of an ill-conditioned problem introduced by time-frequency two-dimensional compression in the MFTN system on receiving demodulation performance is reduced, the method can be expanded to the MFTN system with time-frequency two-dimensional coupling interference, the two-dimensional strong self-interference of the MFTN system can be effectively eliminated, and the complex channel interference introduced by the time-varying fading channel can be processed.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to an MFTN (Multicarrier Faster-Than-Nyquist, multi-carrier super-Nyquist signal) joint channel estimation and equalization method in a time-variable frequency-selective fading channel. Background technique [0002] Faster-Than-Nyquist (FTN) signals provide a new non-orthogonal waveform solution for high-speed wireless mobile communications. By sacrificing the orthogonality conditions of different modulation waveforms, FTN signals can significantly increase the transmission rate without adding additional bandwidth, thereby achieving higher channel capacity than traditional orthogonal signals. Based on the advantages of FTN signals in high-speed wireless communication systems, some scholars have extended them to two-dimensional multi-carrier transmission systems, that is, multi-carrier Faster-Than-Nyquist (MFTN) signals, so as to realize time , Frequency-domain two-di...

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Application Information

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IPC IPC(8): H04L25/02H04L25/03
CPCH04L25/0242H04L25/03159Y02D30/70
Inventor 马云思李彬武楠张怡坤杨吕骁
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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