联合部分干扰抵消的TD集群多小区联合检测 *

针对TD集群下行智能天线无法使用,链路小区间干扰严重的问题,提出了将判决反馈与单小区联合检测通过部分干扰抵消进行级联的方案消除干扰.通过重新排列总系统矩阵,消除了多反馈级数带来的错误积累,提高了反馈精度,其单小区JD部分避免了扩展矩阵维数,从而减弱了算法对背景噪声的放大效应.比较了其与传统算法的抗小区间干扰能力以及算法复杂度,仿真结果验证了该方案的有效性及在各种信道下的鲁棒性.

On the combination of partial Interference cancellation and joint detection in TD Trunking downlink

Considering the fact that smart antenna can not be applied in TD trunking downlink and the capacity is limited due to the inter-cell interference (ICI), this paper proposes a combination of single-cell joint detection (JD) and decision feedback interference cancellation through partial successive interference cancellation to eliminate interference. By rearranging the total system matrix the accuracy of feedback is insured while the single-cell JD part avoids the expansion of the system matrix dimension, thus weakening the amplification of background noise. The scheme and conventional ICI suppression algorithms are analyzed and compared both in anti-interference ability and complexity. Simulation results verify the effectiveness and robustness of the scheme under a variety of multipath channels.