西安交通大学电信学院信息工程研究所,陕西,西安,710049
纸质出版:2003
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冯爱刚, 殷勤业, 邓 科. 基于时空解析恒模算法的CDMA智能 天线系统盲信号分离[J]. 电子学报, 2003,31(3):328-331.
FENG Ai-gang, YIN Qin-ye, DENG Ke. Blind Source Separation with Space-Time Analytical CMA in CDMA Smart Antenna Systems[J]. Acta Electronica Sinica, 2003, 31(3): 328-331.
针对恒模算法只能由迭代算法实现和解析恒模算法分辨用户数受限等问题
本文在解析恒模算法基础上
提出空时解析恒模算法(ST-ACMA)
并将其应用于CDMA智能天线系统盲信号分离.通过将传统时域或空域的恒模算法扩展到空时域
将求解盲波束权矢量的问题等效成信号子空间盲信号恢复问题
通过多个矩阵的联合对角化处理
闭式得到所有用户信号.数值仿真结果表明
该方法有效地解决了解析恒模算法可分辨用户数受阵元数限制的问题
提高了盲信号分离的性能
有效地克服了多址干扰.
The constant modulus algorithm(CMA) is suffered from the complex iteration computation and the analytical CMA (ACMA)is limited with resolvable source number.After analyzing the ACMA
a space-time ACMA is proposed to achieve blind source separation in CDMA smart antenna systems.By extending the traditional CMA only in time domain or in space domain to the space-time domain
the analytical solution is obtained with several joint approximate diagonalization of eigen-matrices
and converts the problem of solving the blind beamforming weigh to signal subspace.Numerical simulations illustrate that the proposed approach can overcome the limitation to the number of sources
and efficiently reduce the multiple access interference (MAI).
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