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Satellite navigation receivers empty , interference suppression algorithm

Author: YeWenJun
Tutor: YuJingDong
School: University of Electronic Science and Technology
Course: Communication and Information System
Keywords: Space-time adaptive processing Algorithm Interference suppression Array signal processing
CLC: TN967.1
Type: Master's thesis
Year: 2008
Downloads: 143
Quote: 1
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Abstract


Wide application in the fields of the national economy and military satellite navigation receiver, making its high reliability requirements, especially in a battlefield environment, electromagnetic interference may be rapidly changing, how to ensure that the navigation receiver in this case Next to maintaining the status quo, and be able to provide effective services, must carry out extensive and in-depth study of its interference suppression technology, to ensure its reliability This article is for one of the space-time interference suppression techniques were Algorithm. The proposed space-time interference suppression technique is traditional array signal processing can not effectively suppress wideband interference and multipath, the main reason is the need to suppress this interference signal degrees of freedom than to narrowband interference signal , especially a large number of broadband interference signal multipath exists, the traditional array signal processing can not be suppressed by these interfering signals and extract the desired signal. In order to achieve the optimal effect of the space-time processing, you must determine the optimal algorithm. Different algorithms for solving the optimal weight coefficients to meet the different needs. Interference suppression algorithm has the following four this paper simulation used empty, they are sampling matrix inversion algorithm (SMI), single Star constrained minimum output power algorithm (MinC), single-star minimum output power algorithm without constraints (MinU), multi-satellite minimum output power constraints algorithm (MinMC). This article is in the careful study of the above algorithm, application software MATLAB simulation platform, close to the interference signal by setting and the actual situation of the desired signal and the noise signal parameters, to simulate the sample matrix inversion algorithm, single star constraint minimum output power of the algorithm, a single star the unconstrained minimum output power algorithm in single-satellite signals in a single broadband interference signal, the presence of a single narrowband interference signal and the complex electromagnetic interference signal interference rejection performance obtained under conditions of strong interference The algorithm consists of superior to inferior order of sample matrix inversion algorithm, the minimum output power under the constraint of single star algorithm and a single star without the constraints of minimum output power algorithm, the the weak interference under the conditions of a single star unconstrained minimum output power algorithm failure other conclusions. Finally, the the more Star constraints of minimum output power algorithm multi-satellite signal in a single broadband interference and the single narrowband interference when the interference suppression performance, increasing the angle between the interference and the desired signal, the interference suppression performance in improving and the degree of improvement in different scenes and different. The output SINR (SJNR) and bit error rate (BER) of these two indicators to assess the performance analysis.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Radio navigation > Navigation systems of the various institutional > Satellite navigation system
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