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在WCDMA和CDMA2000组成的共存系统中,邻频干扰是影响系统性能的重要因素,分别从上下行链路两个方面理论分析了由CDMA2000系统引起的邻频干扰对WCDMA系统产生的影响。仿真结果表明,基站与移动台之间的距离、干扰移动台数、两系统之间的保护带宽都将不同程度地影响WCDMA基站的最小允许接收功率和WCDMA移动台的SIR,从而导致系统容量的下降。
In co-existence system consisting of WCDMA and CDMA2000, adjacent frequency interference is an important factor affecting system performance. The influence of adjacent frequency interference caused by CDMA2000 system on WCDMA system is theoretically analyzed from two aspects of uplink and downlink respectively. The simulation results show that the distance between the base station and the mobile station, the number of interfering mobile stations and the protection bandwidth between the two systems will all affect the minimum allowable received power of the WCDMA base station and the SIR of the WCDMA mobile station to various degrees, resulting in a decrease of the system capacity .