一种基于OFDM-IDMA的小区干扰抑制方法

An iterative soft detection receiver based inter-cell interference suppression method for high-order modulation signal in OFDM system

在下一代的无线通信正交频分复用(OFDM)系统中,提出一种基于交织迭代软解调接收机。发射机和接收机结合了交织分多址(IDMA),所提出的信号估计器(ESE)利用交织码消除邻小区干扰(ICI),结合软解调技术,通过迭代获得低误码率的高阶调制邻小区干扰抑制性能。蒙特卡洛仿真结果显示,所提出的接收机模型在16QAM的OFDM系统中,高斯以及瑞利信道条件下,均能获得较好的误码率性能。

This paper provides a new method of iterative soft detection receiver to suppress the Inter-Cell Interference（ICI） in the next generation communication Orthogonal Frequency Division Multiplexing（OFDM） system. With the combination of the Interleave-Division Multiple Access（IDMA） technology, the new Elementary Signal Estimator（ESE） in the receiver suppresses the interference from neighbor cell. Besides, the soft detection technology in the receiver can achieve the system with high-order modulation signal by using iterative detection scheme. Monte Carlo simulation results show the proposed receiver obtains the good BER performance in both AWGN and Rayleigh channel for 16QAM modulation scheme.