基于非标准约束的常数模检测器

摘要

本文讨论一种具有非标准约束的常数模准则，得出一种新的盲多用户检测器。首先论述该检测具有较强的多址干扰抑制能力，其性能不受解调信号的接收功率影响。然后证明具有非标准约束的常数模准则在适当条件下是严格凸的。由此，利用随机梯度方法，给出检测器的盲自适应算法，并且分析该算法的收敛性。仿真实例验证了本文的结论。%The paper considers a constant modulus cost function with non-canonical constraint,and presents a new blind multiuser detector. First,the capability of the detector to suppress multi-access interfrerence (MAI) is analyzed. The results show that the performance of the detector is not affected by the received power of the demodulated signal. Furthermore, we show that the constant modulus cost function with non-canonical constraint is strictly convex under some conditions. Using the stochastic method, a blind adaptive algorithm can be given, and its convergence is analyzed. The simulation examples demonstrate the results.