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Interference noise estimation and interference inhibition method and corresponding system

A technology of interference noise and interference suppression, applied in the field of communication, can solve problems such as channel information estimation

Active Publication Date: 2012-07-11
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for estimating interference noise and a corresponding system to solve the problem of channel information estimation when there is co-channel interference in adjacent cells

Method used

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  • Interference noise estimation and interference inhibition method and corresponding system
  • Interference noise estimation and interference inhibition method and corresponding system
  • Interference noise estimation and interference inhibition method and corresponding system

Examples

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application example 1

[0180] In this example, Press the formula to get:

[0181] R ^ NI - D ′ ( j ) = R ^ NI - D ( j ) + γ tr ( R ^ NI - D ( j ) ) N Rx × I I

[0182] Among them, 0≤γ≤1, and γ is determined by I;...

application example 2

[0184] In this example, Press the formula to get:

[0185] R ^ NI - D ′ ( j ) = ( 1 - γ ) R ^ NI - D ( j ) + γ tr ( R ^ NI - D ( j ) ) N ...

application example 3

[0188] In this example, Press the formula to get:

[0189] R ^ NI - D ′ ( j ) = R ^ NI - D ( j ) + γ λ max ( R ^ NI - D ( j ) ) N Rx × I I

[0190] Among t...

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Abstract

The invention discloses an interference noise estimation and an interference inhibition method and a corresponding system. In an interference inhibition zone, when one borne dataflow is subjected to interference noise estimation with the method, the method comprises the following steps: for each pilot frequency subcarrier corresponding to the dataflow, calculating to obtain the interference noise covariance matrix of the position of the pilot frequency subcarrier according to a pilot frequency signal sent by a transmitting end on the pilot frequency subcarrier, a receiving signal on the pilot frequency subcarrier and a channel coefficient estimation value of the position of the pilot frequency subcarrier; for each data subcarrier corresponding to the dataflow, taking the weighted average of the interference noise covariance matrix of the position of each pilot frequency subcarrier corresponding to the dataflow as a first interference noise covariance matrix; and taking a result obtained by carrying out diagonal loading on the first interference noise covariance matrix as a second interference noise covariance matrix. When an adjacent cell has same-frequency interference, the interface noise can be accurately estimated with the interference noise estimation and interference inhibition method, and the interference inhibition result is improved.

Description

technical field [0001] The invention relates to the communication field, in particular to an interference noise estimation and interference suppression method and a corresponding system. Background technique [0002] Wireless communication systems are always subject to various interferences. For the 4th generation of communication systems based on OFDMA (Orthogonal Frequency Division Multiple Access) technology (4G, Wimax, LTE) , always suffer from severe OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) co-channel interference (Co-Channel Interference, CCI). In the cellular network, due to the relationship of spectrum reuse, this kind of interference appears as neighbor cell interference. Since the interference source usually interferes with multiple data carriers at the same time, it can be considered as a broadband interference. [0003] At present, the problem of adjacent cell interference control, suppression and elimination ...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04L25/02H04L25/03
CPCH04L27/2691H04L27/2666
Inventor 肖华华宁迪浩朱登魁鲁照华
Owner ZTE CORP
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