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为了利用多用户检测和并行干扰对消克服WCDMA系统的多址干扰和远近效应,文中建立了WCDMA系统模型并由此推导了一种用于WCDMA上行系统的并行干扰对消算法,并在E-DPDCH信道验证了算法的性能。将干扰用户发射信噪比固定为14dB,当两个用户到达同一吞吐量时,采用PIC有1.5dB的信噪比增益。最后针对基于CCSS平台的仿真结果提出了几种优化方案。
In order to overcome the multiple-access interference and the near-far effect of WCDMA system by using multi-user detection and parallel interference cancellation, a WCDMA system model is established and a parallel interference cancellation algorithm for WCDMA uplink system is deduced. The DPDCH channel verifies the performance of the algorithm. The interfering user fixed the signal-to-noise ratio to 14dB, and when both users reached the same throughput, the PIC had a 1.5dB SNR gain. Finally, several optimization schemes are proposed for the simulation results based on the CCSS platform.