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Self-adaptive method and device for eliminating interference of multiple antennae through diversity and mergence

An interference elimination and self-adaptive technology, applied in the field of mobile communications, can solve problems such as performance degradation, inability to reflect the spatial correlation characteristics of interference channels, and NI matrix calculation values ​​that cannot reflect interference, so as to reduce complexity and calculation amount, and suppress interference , the effect of robust performance

Inactive Publication Date: 2012-05-30
ZTE CORP
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual use, there are often large interference components in the received signal, but the NI matrix contains little or no interference components. At this time, using the IRC algorithm will actually deteriorate the performance.
This is because when the number of samples involved in the statistical calculation of the NI matrix is ​​insufficient (usually the number of pilots in a certain resource granularity), the calculated value of the NI matrix cannot reflect the characteristics of the interference. At this time, the main component of the estimated NI matrix is ​​noise. The spatial correlation characteristics of the interfering channel cannot be reflected. In this case, since the characteristics of the interfering signal cannot be obtained, the only option is to use the non-interference suppression combining algorithm (MRC)

Method used

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  • Self-adaptive method and device for eliminating interference of multiple antennae through diversity and mergence
  • Self-adaptive method and device for eliminating interference of multiple antennae through diversity and mergence
  • Self-adaptive method and device for eliminating interference of multiple antennae through diversity and mergence

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application example 1

[0074] In this application example, it is assumed that the receiving side of a communication system has m receiving antennas, and m received signal samples S are obtained during reception. 1 S 2 ... S m .

[0075] It is assumed that the system has n resource blocks to be detected, and each resource block has p data carriers to be detected and q pilot carriers.

[0076] First, the antenna noise floor is estimated using an empty carrier that does not send any data, and the measured noise floor power of m receiving antennas is σ 1 σ 2 …σ m .

[0077] Select a resource block to be detected, estimate the channel response on each receiving antenna, use the q pilot carriers on it for channel estimation, and obtain the channel response estimates of p data carriers Among them, i and j represent the i-th carrier in the j-th receiving antenna.

[0078] Select the above-mentioned resource blocks to be detected, and complete the NI matrix estimation value R of p data carriers i , ...

application example 2

[0087] Assume that the receiving side of a certain communication system has m receiving antennas, and m received signal samples S are obtained during reception. 1 S 2 ... S m .

[0088] It is assumed that the system has n resource blocks to be detected, and each resource block has p data carriers to be detected and q pilot carriers.

[0089] First, the antenna noise floor is estimated using an empty carrier that does not send any data, and the measured noise floor power of m receiving antennas is σ 1 σ 2 …σ m .

[0090] Select a resource block to be detected, estimate the channel response on each receiving antenna, use the q pilot carriers on it for channel estimation, and obtain the channel response estimates of p data carriers Among them, i and j represent the i-th carrier in the j-th receiving antenna.

[0091] Select the above-mentioned resource blocks to be detected, and complete the NI matrix estimation R of p data carriers i , where R i Indicates the i-th data...

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Abstract

The invention discloses a self-adaptive method and device for eliminating interference of multiple antennae through diversity and mergence. The method comprises the following steps of: measuring noise power of each receiving antenna; judging whether the ratio of the sum of diagonal elements of an NI (Noise Index) matrix of a data carrier to be detected to an average value of the noise power of all receiving antennae is larger than a preset threshold value; if so, carrying out interference suppression and mergence detection on the data carrier to be detected; and if not, carrying out noninterference suppression and mergence detection on the data carrier to be detected. Starting from an NI estimation matrix as the most fundamental factor influencing an IRC (Interference Rejection Combining) merging algorithm, whether the currently obtained NI matrix contains more interference components is judged through the specific numerical value characteristic of the NI matrix, and then, an IRC algorithm or MRC (Mixed Radix Conversion) algorithm is selected, so that the system obtains the optimal performance.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, and more specifically, to an adaptive multi-antenna diversity combining interference elimination method and device. Background technique [0002] Wireless communication systems are always subject to various interferences. For 4th generation communication (4G) systems based on OFDMA (Orthogonal Frequency Division Multiple Access) technology, such as Wimax (Worldwide Interoperability For Microwave Access, Global Microwave Interconnection Access), LTE (Long Term Evolution, long-term evolution), always suffers from relatively serious OFDM co-channel interference (Co-Channel Interference, CCI for short). 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, it can be considered as a broadband interference. [0003] At present...

Claims

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Application Information

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IPC IPC(8): H04B7/04H04L25/02H04L25/03
CPCH04J11/0036H04B17/0055H04B7/0857H04J11/0053H04B17/345
Inventor 宁迪浩朱登魁肖华华鲁照华
Owner ZTE CORP
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