Adaptive diversity combining method and apparatus

A self-adapting and path-dividing technology, applied in the field of communication systems, can solve the problems of increasing the computational complexity of the system, limiting the scope of use of the combining method, etc., so as to reduce the complexity and reduce the computational delay.

Active Publication Date: 2017-04-05
COMBA TELECOM SYST CHINA LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, this method makes multiple judgments in the time domain, and this method is only applicable to the combination of 2-way diversity signals
In this way, it not only limits the scope of use of the combination method, but also increases the complexity of the system calculation

Method used

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  • Adaptive diversity combining method and apparatus
  • Adaptive diversity combining method and apparatus
  • Adaptive diversity combining method and apparatus

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Embodiment Construction

[0028] For ease of understanding, the following will be described in conjunction with the accompanying drawings.

[0029] Please refer to figure 2 , the present invention proposes an adaptive diversity combining method, comprising steps:

[0030] S101. Receive multi-channel diversity signals;

[0031] The multi-path diversity signal can be composed of reference signal and non-reference signal, or only non-reference signal. Among them, the reference signal is a sequence known to both the receiving and transmitting ends and used to assist reception (channel estimation, noise interference matrix calculation), also known as the training sequence; the non-reference signal is sent by the sending end, and the receiving end needs to pass A data sequence that can only be obtained through processes such as equalization, demodulation, and decoding.

[0032] S102. Calculate the non-reference signal noise interference covariance matrix according to the multi-channel diversity signal; ...

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Abstract

The invention provides a self-adaption diversity combining method. The self-adaption diversity combining method comprises the following steps: receiving a plurality of paths of diversity signals; calculating a non-reference signal noise interference covariance matrix according to the paths of diversity signals; obtaining an average value of a main diagonal element of the non-reference signal noise interference covariance matrix and an average value of a non-diagonal element; judging whether a numerical value relation of the average value of the non-diagonal element and the average value of the main diagonal element meets a pre-set condition or not; if so, carrying out diversity combining according to an IRC (Interference Rejection Combining) principle; if not, carrying out the diversity combining according to an MRC (Maximum Ratio Combining) principle. The invention further provides a self-adaption diversity combining device which is simple and effective to realize; the complexity of system calculation is reduced and the application range of the diversity combining is enlarged.

Description

technical field [0001] The invention relates to the field of communication systems, in particular to an adaptive diversity combining method and device. Background technique [0002] At present, OFDM technology is widely used in the field of digital communication, especially in the field of wireless communication. A communication system using OFDM technology can provide higher throughput and better service quality. In the central area of ​​the communication cell, the main factor affecting the system throughput is noise, mainly white noise, and it is generally considered that the system at this time is noise-limited. Such as figure 1 As shown, user terminals UE1 and UE2 are located in cell edge areas of cell 1 and cell 2 respectively. For base station 1, it will receive signals from UE1 and UE2 at the same time. If UE1 and UE2 transmit signals in the same frequency band. Then, the main factor affecting base station 1 receiving the UE1 signal is the same-frequency signal f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/08
Inventor 秦伟刁穗东付杰尉刘旻
Owner COMBA TELECOM SYST CHINA LTD
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