Unlock instant, AI-driven research and patent intelligence for your innovation.

Codebook Design Method for Adaptive Differential Precoding for Space-Time Correlated Channels

An adaptive differential and design method technology, applied in electrical components, radio transmission systems, transmission systems, etc., can solve the problems of only considering time correlation, spatial correlation, codebook radius reduction, etc., to achieve convenient calculation. and the resulting effect

Active Publication Date: 2021-09-07
NANJING UNIV OF INFORMATION SCI & TECH
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the Polar-cap differential precoding codebook only considers the time correlation when designing the codebook radius, and does not take the spatial correlation into account.
As time goes by, the radius of the codebook in the adaptive scaling technology in the existing differential precoding codebook will continue to shrink, and the ability to track channel changes will become weaker

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Codebook Design Method for Adaptive Differential Precoding for Space-Time Correlated Channels
  • Codebook Design Method for Adaptive Differential Precoding for Space-Time Correlated Channels
  • Codebook Design Method for Adaptive Differential Precoding for Space-Time Correlated Channels

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0050] Transmitted signal x at time τ τ After passing through the MU-MISO system, the received signal of the i-th user: Among them, H represents the conjugate transpose; ρ is the signal-to-noise ratio; 1≤i≤K, K is the number of users at the user end; is the additive white Gaussian noise signal polluted by the i-th user at time τ; the transmitted signal v i is the precoding vector of the i-th user, s i is the i-th data symbol, satisfying E[|s i | 2 ] = 1; is the channel vector experienced by the i-th user at time τ, under the space-time correlation channel no T is the number of transmitting antennas, ε i is the time correlation coefficient of the i-th user; is an independent and identically distributed vector, R t,i is the spatial emission correlation matrix of the i-th user, which can be expressed as an exponential form

[0051]

[0052] In the formula, t i is the spatial emission correlation coefficient. The present invention assumes that the time correl...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention relates to the technical field of multi-input multi-output (MIMO) system precoding, in particular to a multi-user multi-input single-output (Multi-User Multi-Input Single-Output, MU ‑MISO) system adaptive differential precoding codebook design method. The present invention first introduces the steps of an adaptive differential precoding codebook based on the channel variation law; secondly, it improves the generation method of the Polar-cap differential precoding codebook, which does not require separate operations on each element of the base codeword, which is convenient for calculation and generation; finally, the codebook radius is redesigned by dividing the codebook radius into two parts, the average chord distance and the quantization error, taking time correlation and space correlation into account.

Description

technical field [0001] The present invention relates to the technical field of Multi-Input Multi-Output (MIMO) system precoding, in particular to a Multi-User Multi-Input Single-Output (MU-User Multi-Input Single-Output, MU- MISO) system adaptive differential precoding codebook design method. Background technique [0002] In a multiple-input multiple-output MIMO closed-loop system, the transmitting end uses the Channel State Information (CSI) fed back by the receiving end to perform precoding, which can eliminate the interference between data streams in advance and allocate the optimal power. However, in an actual wireless communication system, it is difficult for the transmitting end to obtain complete CSI, so the receiving end can obtain part of the CSI by feeding back the quantized CSI to the transmitting end through a low-speed feedback link. In this case, the transmitting end and the receiving end need to save the same codebook, and the codewords in the codebook can b...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0456H04B7/0452
CPCH04B7/0452H04B7/0456
Inventor 郭业才周腾威郑梦含顾弘毅
Owner NANJING UNIV OF INFORMATION SCI & TECH