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Transmission and decoding method based on gold code applied to MIMO downlink system

A decoding method, a golden technology, applied in the transmission system, baseband system, digital transmission system, etc., can solve the problems of high decoding complexity and low system performance

Inactive Publication Date: 2018-06-19
HANGZHOU DIANZI UNIV
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Problems solved by technology

[0004] Aiming at the disadvantages of low performance and high decoding complexity of the existing golden code-based system, the present invention utilizes a new precoding design scheme, a precoding codeword selection method, a new transmission scheme and a corresponding low-complexity decoding method to realize For better system performance, a new transmission scheme based on golden code and corresponding low-complexity decoding method for MIMO downlink system is proposed

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  • Transmission and decoding method based on gold code applied to MIMO downlink system
  • Transmission and decoding method based on gold code applied to MIMO downlink system
  • Transmission and decoding method based on gold code applied to MIMO downlink system

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Embodiment 1

[0090] This embodiment is used in the transmission and decoding method based on golden code in the MIMO downlink system, and it is carried out according to the following steps:

[0091] Step 1: Design a precoded codebook

[0092] Assuming that the system is single-user, the base station is equipped with M t One transmit antenna and two receive antennas at the user end. The design size is L=2 b precoded codebook where U i is M t ×r-dimensional matrix, and satisfy Here r is called the rank of the codeword. Codeword U i defined as

[0093] u i =Θ i-1 f 0 ,i=1,2,...,L

[0094] where F 0 for M t ×r-dimensional matrix, defined as size M t The first r columns of the discrete Fourier transform matrix of

[0095] 1≤k≤M t And 1≤l≤M t

[0096] in The matrix Θ is defined as M t × M t Diagonal matrix of dimension, expressed as

[0097]

[0098] where the parameters on the Θ diagonal is an integer to be determined, and

[0099] Codebook Design Guidelines:...

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Abstract

The invention discloses a transmission and decoding method based on a gold code applied to an MIMO downlink system. The method comprises the following steps of 1, designing a pre-coding codebook; 2, selecting a pre-coding codebook; 3, sending a signal by a base station through using pre-coding; 4, receiving a signal matrix Y by a user side; and 5, decoding the signal matrix Y. The method providedby the invention has the beneficial effect as follows: the gold code generally adopts an ML decoding method, and the decoding complexity is relatively high. When r is equal to 1, the scheme provided by the invention has linear decoding complexity and can achieve a full rate, that is to say a signal symbol is sent at a time. When r is equal to 2, the decoding complexity of the joint decoding methodprovided by the invention can be adjusted via a threshold value A, the partial linear decoding can be achieved, and thus the decoding complexity is reduced, and the joint decoding method can achievethe performance similar to that of the ML decoding method. And meanwhile, the transmission scheme provided by the invention is low in decoding complexity and meanwhile also improved in system performance.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, in particular to the technical field of multi-antenna wireless communication, in particular to the application of a golden code-based transmission scheme and a decoding method in a MIMO downlink system. Background technique [0002] With people's demand for information communication anytime and anywhere, multiple input multiple output (MIMO) technology has become one of the important choices of modern wireless communication. In the MIMO downlink system, precoding technology is a key technology. It can effectively enhance the desired signal and suppress the co-channel interference between users, but it cannot resist the deep fading of the channel. Space-time coding technology can resist deep fading, but it cannot effectively suppress interference. Combining the two can obtain diversity gain and multiplexing gain at the same time, and can greatly improve system capacity and spectrum...

Claims

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Application Information

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IPC IPC(8): H04B7/0456H04B7/08H04L25/03
CPCH04B7/0456H04B7/0486H04B7/0854H04L25/0391H04L25/03917H04L25/03923
Inventor 王海泉郑思思李国彬戴谭明
Owner HANGZHOU DIANZI UNIV
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