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Disturbance power estimation apparatus and method and disturbance power detecting system

A technology of interference power and average interference power, applied in the field of interference power estimation equipment, can solve problems such as inability to work, and achieve the effects of improving performance, improving accuracy, and good tracking performance

Inactive Publication Date: 2006-11-01
诺基亚西门子通信系统技术(北京)有限公司
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Problems solved by technology

[0005] The second is to estimate the noise power using unallocated midamble offsets, but this method does not work when the system load is very high, i.e. all midamble offsets are allocated

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  • Disturbance power estimation apparatus and method and disturbance power detecting system
  • Disturbance power estimation apparatus and method and disturbance power detecting system
  • Disturbance power estimation apparatus and method and disturbance power detecting system

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Embodiment Construction

[0030] Before the description, describe the mathematical symbols used in this article and their meaning: complex variables are underlined, vectors and matrices are marked in bold, C represents a set of complex numbers; C M×N Represents a complex matrix space, the elements in this space are complex matrices with M rows and N columns, when M=1, degenerate into N-dimensional row vectors, and when N=1, degenerate into M-dimensional column vectors; j stands for imaginary unit (·) H Represents the conjugate transpose; tr( ) represents the sum of the diagonal elements of the square matrix; rank( ) represents the rank of the matrix; ‖·‖ represents the norm of a vector or matrix. In this document, the norm of a vector is defined It is: first seek the sum of the squares of the modulus of each element in the vector, and then take the square root; E(·) represents the statistical average; [·] i，j Indicates the elements located in the i-th row and j-th column of the matrix; […,…,…] mea...

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Abstract

The present invention provides a method for accurately estimating interference power in a TD-(S)CDMA wireless communication system, using multi-user detection technology including joint detection and interference elimination, through received data blocks and intermediate training sequence blocks. Perform joint interference power estimation. In addition, the present invention also introduces an interference power estimation correction factor, and uses the post-processing result of the channel estimation output for the aforementioned estimation process. The present invention also correspondingly provides a multi-user detection interference power estimator based on received data and combined channel impulse response, and an interference power detection system in a TD-(S)CDMA system.

Description

technical field [0001] The present invention relates to an interference power estimation device and method in TD-(S) CDMA, in particular to a TD-(S) CDMA multi-user detection interference power estimation device and method, and an interference power detection system. Background technique [0002] So far, TD-(S)CDMA systems have adopted two methods to solve the problem of interference power estimation. One is to use only the middle training sequence block to estimate, although this method is relatively simple, it uses the Pythagorean theorem to estimate the interference power, that is‖ n ‖ 2 =‖ n +∑ i m i ‖ 2 -∑ i ‖ m i ‖ 2 , but it has a fatal shortcoming, it does not consider the cross-correlation characteristics of each intermediate training sequence offset, namely: [0003] E(< m i , m j >)≠0,_i,j. (1) [0004] In this way, the estimated noise is very inaccurate, especially when there are many users. where n is the interfer...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q7/20H04B1/10H04B17/00H04W24/00H04B17/373
Inventor 王双全白伦博阳建军许荣涛宋建霞
Owner 诺基亚西门子通信系统技术(北京)有限公司