Codebook design method based on Fourier disturbance matrixes

A design method, Fourier technology, applied in space transmit diversity, diversity/multi-antenna system, error prevention/detection through diversity reception, etc., can solve the problem of not considering the balance problem, unable to provide bit error rate performance, etc.

Inactive Publication Date: 2014-07-23
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The Kerdock codebook itself does not consider the balance of the signal-to-noise ratio of any two data streams in the spatial multiplexing stream, and cannot provide the best bit error rate performance.

Method used

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  • Codebook design method based on Fourier disturbance matrixes
  • Codebook design method based on Fourier disturbance matrixes
  • Codebook design method based on Fourier disturbance matrixes

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Embodiment Construction

[0028] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings, so that those skilled in the art can better understand the present invention. It should be noted that in the following description, when detailed descriptions of known functions and designs may dilute the main content of the present invention, these descriptions will be omitted here.

[0029] figure 1 It is a flowchart of the steps for realizing the present invention. Such as figure 1 As shown, the present invention includes three major steps of constructing the main codebook, constructing the auxiliary codebook and the codebook matrix W(i).

[0030] definition:

[0031] Mutually unbiased basis: Assume S={s 1 ,...,s M},U={u 1 ,...,u M} are two M×M orthonormal bases. If the column vectors in S and U satisfy It is said to satisfy mutual unbiasedness.

[0032] In this example, if figure 2 As shown, taking the transmitting antenna as N t =32 ant...

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Abstract

The invention discloses a codebook design method based on Fourier disturbance matrixes. A designed codebook is composed of a main codebook body and an auxiliary codebook body, the main codebook body is a Kerdock codebook, and the auxiliary codebook body is composed of a series of Fourier disturbance matrixes. According to the codebook design method based on the double codebook bodies, the size of the codebook is increased, the signal-noise ratio of any two paths of data flows in the spatial multiplexing flow is well balanced, the optimal error rate performance can be provided for a system, and channel capacity is improved. The codebook design method can be used on the occasions with the large signal-noise ratio between spatial multiplexing data flows, and the better channel capacity and error rate performance can be obtained with lower codebook expenses and lower search complexity.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and more specifically relates to a codebook design method based on a Fourier perturbation matrix. Background technique [0002] In a multiple-input multiple-output (MIMO) system, in order to improve system transmission performance by performing precoding operations at the sender, the sender needs to know channel state information (CSI), and CSI is usually fed back from the receiver to the sender. With the continuous increase of the number of transmit antennas in the MIMO system, in order to ensure the performance of precoding, it is necessary to increase the size of the codebook. At this time, the codebook search complexity and the CSI feedback overhead also increase accordingly. Therefore, it is very important to design a reasonable codebook to balance the precoding performance and feedback overhead to improve the overall system performance. [0003] Existing codebook constructi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04B7/04
Inventor 邝育军
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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