Superposition coding, decoding method, device, transmitter and receiver

A superposition coding and transmitter technology, applied in the field of communication, can solve the problem of low multi-user performance and achieve the effect of improving multi-user performance

Active Publication Date: 2019-12-17
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a superposition coding and decoding method, device, transmitter and receiver to at least solve the problem of low multi-user performance in the related art when multi-users are directly superimposed

Method used

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  • Superposition coding, decoding method, device, transmitter and receiver
  • Superposition coding, decoding method, device, transmitter and receiver
  • Superposition coding, decoding method, device, transmitter and receiver

Examples

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Embodiment 1

[0116] In order to emphasize the characteristics of the present invention, the following preferred typical embodiments are combined with simulation results to illustrate the obvious improvement in performance of the present invention.

[0117] A downlink NOMA superposition coding scheme. The base station adopts the first type of BPSK modulation method to obtain the modulation symbol S1 for the edge user information, and allocates a certain power to S1. The first type of BPSK modulation means that the bit "0" is modulated into 1, and the bit "1" is modulated as -1; the central user information is modulated by QPSK to obtain the modulation symbol S2, and a certain power is allocated to S2. The base station mirrors the symbol S2 horizontally, and the mirrored symbol S can be expressed as Sign(x1)·x2+y2·i. The symbol S mirrored by S2 is directly superimposed on the symbol S1 to obtain the superimposed symbol S3. The superimposed constellation of symbol S3 is Gray mapped.

[0118...

example 2

[0124] In order to emphasize the characteristics of the present invention, the following typical embodiment 2 is preferred and combined with the simulation results to illustrate the obvious improvement in performance of the present invention.

[0125] A downlink NOMA superposition coding scheme. The base station uses the second type of BPSK modulation method to obtain the modulation symbol S1 for the edge user information, and allocates a certain power to S1. The second type of BPSK modulation means that the bit "0" is modulated into Modulates a bit "1" to The central user information is modulated by QPSK to obtain the modulation symbol S2, and a certain power is allocated to S2. The base station performs horizontal mirroring and 45-degree phase rotation on the symbol S2, and the symbol S after mirroring and 45-degree phase rotation can be expressed as e iπ / 4 ·(Sign(x1)·x2+y2·i). The symbol S after mirroring and 45-degree phase rotation is superimposed on the symbol S1 to ...

example 3

[0131] In order to emphasize the characteristics of the present invention, the following typical embodiment 3 is preferred and combined with the simulation results to illustrate the obvious improvement in performance of the present invention.

[0132] A downlink NOMA superposition coding scheme. The base station uses the first type of BPSK modulation method to obtain the modulation symbol S1 for the edge user information, and allocates a certain power to S1. The first type of BPSK modulation means that the bit "0" is modulated into 1, and the bit " 1" is modulated as -1; the central user information is modulated by 4-point PAM (4PAM modulation) to obtain the modulation symbol S2, and a certain power is allocated to S2. The symbol S1 and the symbol S2 are directly superimposed to obtain the superimposed symbol S3. The superimposed constellation of symbol S3 is Gray mapped.

[0133] Comparing the traditional superposition coding mode 1 in the first embodiment, according to the ...

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Abstract

Disclosed are a superposition coding and decoding method and apparatus, a transmitter, and a receiver. The method comprises: modulating an information stream of a first type of user by using a binary phase shift keying (BPSK) modulation scheme to obtain a first modulated symbol, and modulating an information stream of a second type of user by using a second modulation scheme to obtain a second modulated symbol; allocating power to the first modulated symbol and the second modulated symbol; and superposing the first modulated symbol and the second modulated symbol after the power allocation, the constellation diagram of the superposed symbols being Gray mapped. The present invention resolves the problem in the related art that the performance of multiple users is not high when the multiple users are directly superposed, thereby achieving an effect of improving multi-user performance.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a superposition coding and decoding method, device, transmitter and receiver. Background technique [0002] The multi-user information transmission technology can be divided into Orthogonal Multiple Access (OMA for short) and Non-Orthogonal Multiple Access (NOMA for short) according to the access mode. In OMA technology, each user uses strictly mutually orthogonal "sub-channels" to communicate. In contrast, in NOMA technology, the information of each user is transmitted on the "whole channel". Relevant works show that NOMA method can achieve better than OMA method. Larger system capacity, figure 1 is a capacity comparison chart between the NOMA mode and the OMA mode in related technologies, such as figure 1 As shown, the NOMA method can give priority to improving the capacity of the cell edge users, while basically maintaining the high throughput of the center users. In orde...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L27/18
CPCH04L1/00H04L27/18
Inventor 袁志锋戴建强
Owner ZTE CORP
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