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Rateless transmission method for adaptive spinal cord coding Massive Multiple Input Multiple Output system based on block length

A technology of a multi-antenna system and a transmission method is applied in the field of non-rate transmission of a large-scale multi-antenna system of spinal cord coding, which can solve the problems of low transmission efficiency of long spinal cord codes, and achieve the effects of improving throughput, high transmission efficiency, and excellent transmission efficiency.

Active Publication Date: 2018-03-06
SUN YAT SEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of low transmission efficiency of fixed coding block length spinal cord codes, and provide a method for rateless transmission of large-scale multi-antenna systems with spinal cord coding based on block length self-adaptation

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  • Rateless transmission method for adaptive spinal cord coding Massive Multiple Input Multiple Output system based on block length
  • Rateless transmission method for adaptive spinal cord coding Massive Multiple Input Multiple Output system based on block length
  • Rateless transmission method for adaptive spinal cord coding Massive Multiple Input Multiple Output system based on block length

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Embodiment 1

[0044] This embodiment discloses a rateless transmission method for a large-scale multi-antenna system based on block-length adaptive spinal cord coding. The base station side dynamically adjusts the coding scheme of spinal cord coding according to the current channel transmission quality. The method for rateless transmission of a massive multi-antenna system includes the following steps:

[0045] S1. Initialize system parameters, determine the number of base station antennas M, the number of single-antenna users N, and the effective signal power P on a single receiving antenna, and specify the large-scale matrix of the downlink channel for the l-th signal transmission is a diagonal matrix, a small-scale matrix Then the actual transmission channel matrix Given the estimated channel matrix as Channel estimation error factor δ e .

[0046] S2. Calculate the precoding matrix and the power control factor

[0047] S3. Calculating the received signal-to-interference-noi...

Embodiment 2

[0068] This embodiment is attached in conjunction with the instructions Figure 4 to Figure 7 The high-efficiency transmission method proposed by the present invention will be described in detail by using a specific embodiment of a large-scale multi-antenna system rateless transmission based on block-length self-adaptive spinal cord coding.

[0069] Consider a spinal coded Massive MIMO system model based on block length adaptation such as Figure 4 shown. The number of antennas on the base station side is M=64, the number of single-antenna users is N=4, D. l =I 4 , the received signal power of each user is P, the noise power is 1, and the received signal-to-noise ratio SNR=P.

[0070] First, user raw data u n Coded by the spinal cord, where v 0 =0,c 0 = 32,c 1 =10, the static coding block length of the comparison system is 8 bits. Secondly, the coded symbols of the spinal cord are rotated and interleaved to obtain interleaved symbols, where α=2. Then, precoding is p...

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Abstract

The invention discloses a rateless transmission method for an adaptive spinal cord coding Massive Multiple Input Multiple Output system based on block length, and belongs to the technical field of wireless communications. In the case of unsatisfactory channel estimation, compared with a traditional fixed rate coding method, the spinal cord coding with rateless characteristics can guarantee that the Massive MIMO system works more reliably. A system base station side can dynamically adjust the length of a code block of the spinal cord coding by an achievable data rate of a current user transmission channel, so as to effectively reduce the number of retransmission required for the spinal cord decoding and improve the system transmission efficiency. At the same time, the base station side candynamically select a spinal cord coding puncturing scheme according to the transmission channel quality, so as to ensure the transmission efficiency and reliability of the system at the same time. Compared with the transmission scheme of the spinal cord coding Massive MIMO system with static coding block length, the scheme has better transmission efficiency, thus providing guidance for the deployment of spinal cord codes in an actual system.

Description

technical field [0001] The invention relates to the technical field of large-scale multi-antenna of wireless communication, in particular to a rateless transmission method of a large-scale multi-antenna system based on spinal cord coding based on block length self-adaptation. Background technique [0002] The gain of massive multiple antenna (Massive MIMO) technology depends on the accurate known transmission channel state information (CSI) at the transmitting end (base station side). However, the actual system is often limited by the capacity of the feedback channel and the real-time validity of the feedback information, making it difficult to truly obtain the ideal CSI. In the case of non-ideal CSI, using traditional fixed-rate coding, such as LDPC and Turbo, will obviously reduce the throughput of the system due to rate adaptation. [0003] At present, researchers have proposed a coding method that can approach the upper limit of system throughput under non-ideal CSI by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04B7/0456
CPCH04B7/0456H04L1/0002H04L1/0013H04L1/0061H04L1/0071
Inventor 王亮亮陈翔谭洪舟
Owner SUN YAT SEN UNIV