Method and system for restraining interference and combining diversity

Abstract

The invention discloses an interference suppression diversity and combination method which comprises the steps of calculating the capacities of a level estimation value of a diversity signal and a channel parameter estimation value; calculating the noise variance and cross correlation coefficient of the diversity signal to construct a covariance matrix; constructing a weighted matrix according to the covariance matrix to conduct interference, suppression and combination; and conducting equal demodulation according to a result of the interference, suppression and combination. The invention also discloses an interference suppression diversity and combination system which comprises a calculation module, a covariance matrix construction module, an interference suppression module and an equal demodulation module. The method greatly reduces the complexity of a system, improves the receiving sensitivity of a receiver, and enlarges the coverage of a base station, thereby providing an interference suppression diversity and combination technical proposal which has the advantages of low complexity, high estimation accuracy and easy realized engineering.

Description

technical field [0001] The invention relates to the field of digital communication, in particular to a method and system for interference suppression diversity combination. Background technique [0002] In wireless communication systems, space diversity is an important technology to improve link performance, and this technology also provides the possibility for interference suppression combining, which can further improve the throughput of the system. [0003] In the mobile communication system, on the one hand, people's demand for high-speed data services and the demand of the entire communication market continue to grow; on the other hand, the signals introduced by spurious signals and frequency sharing technology seriously interfere with the correct transmission of voice and data signals , and lead to a reduction in system capacity; in order to overcome these shortcomings, this forces the receiver to be able to process the signal carrying interference, and extract useful ...

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Problems solved by technology

[0005] In addition, the traditional interference elimination technology pays too much attention to the adjacent channel interference suppression by using multiple filters to filter the signal. Correspondingly, a co-channel anti-interference technology is proposed, such as the joint demodulation technology, see the publication number WO9626578, A patent titled "Jointdemodulation using spatial maximum likelihood" published on August 29, 1996, which generally requires a joint channel estimation method to provide a joint determination of the expected co-channel interference signal channel impulse corresponding

However, joint demodulation not only relies on multi-antenna arrays in hardware, but also requires large processing power, resulting in constraints on the number of equalization parameters that can be effectively utilized, and the practical value of this technique is very limited in terms of implementation complexity

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