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Downlink scma codebook generation method based on multi-matrix recurrent layer space-time structure

A downlink and cyclic layer technology, applied in the field of downlink SCMA codebook generation, can solve problems such as non-orthogonal interference and signal distortion, and achieve the effect of reducing the bit error rate

Active Publication Date: 2022-01-21
HARBIN INST OF TECH
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Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of signal distortion and non-orthogonal interference in existing coding methods, and provides a downlink SCMA codebook generation method based on multi-matrix cyclic layer space-time structure

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  • Downlink scma codebook generation method based on multi-matrix recurrent layer space-time structure
  • Downlink scma codebook generation method based on multi-matrix recurrent layer space-time structure
  • Downlink scma codebook generation method based on multi-matrix recurrent layer space-time structure

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specific Embodiment approach 1

[0045] Specific implementation mode one: the following combination figure 1 and figure 2 Describe this embodiment, the downlink SCMA codebook generation method based on multi-matrix cyclic layer space-time structure described in this embodiment, the specific process of this method is:

[0046] S1. Obtain a precoding matrix by using an interference suppression precoding matrix selection algorithm;

[0047] S2. Obtain the precoded information to be sent by using the precoding matrix;

[0048] S3. The transmitter sends the information to be sent to the receiver through the fading channel, and the receiver uses the interference suppression MPA algorithm based on the precoding matrix to perform iterative decoding to obtain a codebook.

[0049] In this embodiment, MPA (Message Passing Algorithm, message passing algorithm) is an algorithm for performing multi-user detection in an uplink SCMA system.

[0050]Further, the specific method of obtaining the precoding matrix by using t...

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Abstract

A downlink SCMA codebook generation method based on a space-time structure of multi-matrix cyclic layers belongs to the technical field of communication signal detection. The invention aims to solve the problems of signal distortion and non-orthogonal interference in existing coding methods. The downlink SCMA codebook generation method based on multi-matrix cyclic layer space-time structure of the present invention, the specific process of the method is: using the interference suppression precoding matrix selection algorithm to obtain the precoding matrix; using the precoding matrix to obtain the precoding matrix The information to be sent; the transmitter sends the information to be sent to the receiver through the fading channel, and the receiver uses the interference suppression MPA algorithm based on the precoding matrix to perform iterative decoding to obtain the codebook. The present invention is used to code a communication system.

Description

technical field [0001] The invention relates to a method for generating a downlink SCMA codebook based on a multi-matrix cyclic layer space-time structure, and belongs to the technical field of communication signal detection. Background technique [0002] According to the development history of mobile communication, communication will be updated and upgraded almost every ten years. In the 1980s, 1G communication was mainly based on voice, and the modulation method was FDMA; in the 1990s, 2G communication developed short message transmission, and the modulation methods included CDMA, TDMA, etc.; 3G communication appeared around 2000, and the transmission rate was accelerated. , the modulation method is CDMA, TDMA; 4G communication after 2010 is also currently in use, the rate is faster, and it can transmit video, etc., the modulation method is OFDM. The 5G communication era is coming, and the main business of 5G is the mobile Internet and the Internet of Things. Mobile Inte...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0456H04L1/06H04L1/00
CPCH04B7/0456H04L1/0048H04L1/0618Y02D30/70
Inventor 于启月李焕英张翼鹏孟维晓
Owner HARBIN INST OF TECH
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