gsm频带中wcdma干扰信号的抑制技术研究-通信与信息系统专业毕业论文.docx

摘要
重建抵消方法的性能,仿真结果表明:SMARTAGC方法对干扰抑制的性能略差于迭代干扰抵消算法,BER=10一时,。
本文对GSM频带中WCDMA干扰信号抑制的研究方法和研究成果可用于现有GSM系统与其他通信系统共存时互干扰的抑制,同时可用于同频传输的两个系统的互干扰抑制,具有重要的理论和经济价值。
关键词:GSM,WCDMA,同频传输,迭代干扰抵消,SMART AGC
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Abstract
Abstract
A major factor that will influence the future munications is the contradictions between the highel"transfer rate and the more limited spectrum resources. In order to save the spectrum resources and reduce the investment idea that different signals could be transmitted withinⅡle same frequency band has been
this idea,the representative of the third generation munication
systern-WCDMA call be transmitted in the same frequency band as the representative of the second generation of munications .
嘶ell we transmit GSM sinai and WCDMA signal in the same frequency band。the two different signals will interfere with each the interference is very seriOtis,it will cause a wore quality of are many methods about reducing the coexistence interference,such as establishing the base station at the same place,
increasing the isolation of antennas,and optimazing the design of there are few Papers researching about the specific interference suppression algorithm.
WCDMA signal will exist in the same frequency band as the GSM signal transmitted The Paper introduced all method based on the iterative signal rebuilt and cancellation to reduce the method based on Smart AGC has already been proposed to reduce the interference by this paper.
The GSM uplink receiVer model has been given to transmit the GSM and WCDMA signal in the same frequecey Can obtain the rebuilding signal using direct pilot symbol averaging,weighted multi-slot averaging,and other channel estimation methods for the proposed signal will be extracted from the signals
received.
We simulated the reconstruction of WCDMA signal based on the weighted