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分析了3G之间的干扰问题,主要是TD-SCDMA对WCDMA、CDMA2000的干扰。通过对终端和基站干扰的分析以及对干扰强度的计算,得出了减少干扰的措施。同时,提出对基站加装带通滤波器的办法,并设计了一种作为WCDMA发射和接收滤波器的波导带通滤波器,以满足一定的插损要求。由于在设计过程中采用了一定的近似,并通过Ansoft仿真软件对参数进行优化,得出了带通滤波器的参数。仿真结果表明,该设计的带通滤波器能很好地满足设计要求。
Analysis of the interference between 3G, mainly TD-SCDMA on WCDMA, CDMA2000 interference. Through the analysis of the terminal and base station interference and the calculation of the interference strength, the measures to reduce the interference are obtained. At the same time, a method of adding a band-pass filter to the base station is proposed, and a waveguide band-pass filter is designed as a WCDMA transmitting and receiving filter to meet certain insertion loss requirements. Due to the adoption of a certain approximation in the design process and the optimization of the parameters by Ansoft simulation software, the parameters of the band-pass filter are obtained. Simulation results show that the design of the band-pass filter can well meet the design requirements.