机构地区: 中山大学信息科学与技术学院电子与通信工程系
出 处: 《通信学报》 2005年第3期14-20,共7页
摘 要: 在 CDMA 系统中,所有上行用户信号的信道估计信息都可以在基站上获得。在 LMS 算法的基础上,结合一种新型的波束合成技术,充分利用多用户信道信息,提出了一种新型的快速自适应波束成形接收机。理论分析及仿真结果显示,新算法在比传统 LMS 算法稍微增加一点运算复杂性的情况下,大幅度地提高了自适应波束成形系统的收敛速度,其输出的信干噪比性能几乎达到最优理论值。 In a CDMA system, channel estimates of all received user signals were available at base stations. Using these information, we proposed a novel fast adaptive beamforming receiver that combined a LMS algorithm and a novel pattern synthesis technique. Theoretical analysis and simulation results show that although the new algorithm adds a little more complexity, it provides a much faster convergence rate as well as a superior performance.