Method and corresponding system for broadband co-frequency interference noise estimation and interference suppression

A technology for co-frequency interference and noise estimation, which is applied in the field of communication and can solve problems such as inaccurate interference estimation.

Inactive Publication Date: 2012-05-30
ZTE CORP
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  • Summary
  • 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 broadband co-channel interference noise, which has solved the inaccurate defect of interference estimation in the prior art

Method used

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  • Method and corresponding system for broadband co-frequency interference noise estimation and interference suppression
  • Method and corresponding system for broadband co-frequency interference noise estimation and interference suppression
  • Method and corresponding system for broadband co-frequency interference noise estimation and interference suppression

Examples

Experimental program
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Effect test

application example 1

[0234] The receiving end completes the interference noise estimation and data detection of each data stream through the following steps:

[0235] (1) The receiving end takes the received signal y on the ith pilot subcarrier of the current data stream in the interference suppression area p (i) Multiply with the conjugate of the pilot signal p(i) sent by the sending end on the i-th pilot subcarrier to obtain the estimated channel coefficient of the pilot subcarrier position which is:

[0236] h ^ p ( i ) = y p ( i ) p * ( i )

[0237] For the definition of each parameter, see above;

[0238] (2) Carry out channel coefficient estimation:

[0239] The receiving end divides the interferenc...

application example 2

[0260] In this example, one data stream is carried in the interference suppression area, and a 16e uplink pilot structure is adopted, such as figure 2 shown.

[0261] The receiving end completes the interference noise estimation and data detection corresponding to the data stream through the following steps:

[0262] (1) The receiver receives the received signal y on the i-th pilot subcarrier corresponding to the data stream p (i) Multiply with the conjugate of the pilot signal p(i) sent by the sending end on the i-th pilot subcarrier to obtain the estimated channel coefficient of the pilot subcarrier position which is:

[0263] h ^ p ( i ) = y p ( i ) p * ( i )

[0264] For the defi...

application example 3

[0287] In this example, two data streams are carried in the interference suppression area, and a 16e uplink pilot structure is adopted, as in image 3 shown.

[0288] For each data stream, the receiving end completes the interference noise estimation and data detection corresponding to the data stream through the following steps:

[0289] (1) The receiving end takes the received signal y on the i-th pilot subcarrier of the data stream p (i) Multiply with the conjugate of the pilot signal p(i) sent by the sending end on the i-th pilot subcarrier to obtain the estimated channel coefficient of the pilot subcarrier position which is:

[0290] h ^ p ( i ) = y p ( i ) p * ( i )

[0291] For...

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Abstract

A method for broadband co-frequency interference noise estimation and interference suppression and a corresponding system are provided, which are applied to estimating interference noise for one data stream borne in an interference suppression area. The method comprises: calculating the interference noise covariance matrix estimation value for each pilot subcarrier corresponding to the data stream according to a signal sent by a transmitting terminal on the subcarrier, a received signal on the subcarrier and a channel coefficient estimation value at the position of the subcarrier; calculating the interference noise covariance matrix estimation value for each data subcarrier corresponding to the data stream according to an initial estimation value of the sent signal, the received signal on the subcarrier and the channel coefficient estimation value at the position of the subcarrier; calculating the weighted average of the interference noise covariance matrix estimation values at the positions of all subcarriers corresponding to the data stream as the interference noise covariance matrix at the position of the subcarrier corresponding to the data stream.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and a corresponding system for wideband co-channel interference noise estimation and interference suppression. Background technique [0002] Wireless communication systems are always subject to various interferences. For the fourth generation of communication systems based on OFDMA (Orthogonal Frequency Division Multiple Access) technology (such as 4G (fourth generation mobile communication and its Technology), Wimax (Worldwide Interoperability for Microwave Access, global microwave interconnection access), LTE (Long Term Evolution, long-term evolution)), always suffer from serious OFDM (Orthogonal Frequency Division Multiplexing, orthogonal frequency division multiplexing) co-channel interference ( Co-Channel Interference, referred to as CCI). In the cellular network, due to the relationship of spectrum reuse, this kind of interference appears as neighbor cell interfe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04L25/02H04L25/03
CPCH04L27/2647H04L25/0232H04L1/20H04L25/022
Inventor 肖华华宁迪浩朱登魁鲁照华
Owner ZTE CORP
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