Low-computational-complexity equalization method for an orthogonal time-frequency air conditioning system

A technology of computational complexity and equalization method, applied in equalizers, multi-frequency code systems, etc., can solve the problems of computational complexity channel model influence, reliability of feedback symbols not considered, etc.
CN109922020AActive Publication Date: 2019-06-21BEIJING UNIV OF POSTS & TELECOMM
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
BEIJING UNIV OF POSTS & TELECOMM
Publication Date
2019-06-21

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Abstract

The invention discloses an orthogonal time-frequency space OTFS modulation equalization method with low computational complexity, which is a method for equalizing interference between two-dimensionalcodes of an orthogonal time-frequency air conditioner under a time-frequency double-selection channel based on iterative parallel interference elimination of a linear minimum mean square error. The method can effectively utilize the covariance matrix of the reconstructed symbol to alleviate the influence of the interference between the residual two-dimensional codes on the OTFS system performance,so that the time-frequency two-dimensional gain can be better utilized, and the system reliability can be improved; time-frequency two-dimensional decomposition and octyl Fourier transform are adopted to carry out first-order Newman series approximation on the inverse matrix in LMMSE-PIC, so that the calculation complexity of the equalization method is reduced, and the equalization method only has a directrix relation with the total number of transmission symbols and is irrelevant to the channel sparsity, so that the system effectiveness is improved. The orthogonal time-frequency air conditioning system has the advantages that the time-frequency two-dimensional diversity gain of the orthogonal time-frequency air conditioning system can be remarkably improved under the time-frequency double-selection channel, the receiver performance of the non-ideal channel decoder during feedback is improved, and the popularization and application prospect is good.
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Description

technical field

[0001] The present invention relates to an equalization method of Orthogonal Time Frequency Space Modulation, to be precise, relates to a low complexity Orthogonal Time Frequency Space Modulation OTFS (Orthogonal Time Frequency Space Modulation) equalization method, which is used in time-frequency dual selection Under-channel delay-Doppler plane two-dimensional inter-code interference to equalize the influence of the orthogonal time-frequency space modulation system, so that the receiving end can obtain more time-frequency two-dimensional gain and realize reliable communication; it belongs to wireless The technical field of waveform modulation equalization method for communication. Background technique

[0002] Orthogonal Time Frequency Space Modulation OTFS (Orthogonal Time Frequency Space Modulation) is a new modulation system for the physical layer of the fifth generation mobile communication system 5G (the fifthGeneration Communication System) proposed by...

Claims

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