Performance and configuration of M-CMA (Modified Constant Modulus Algorithm) adaptive array using polyphase filters

As a way to realize an adaptive array of small size, low cost, and low power consumption, there exists a configuration method combining analog signal processing and digital signal processing. M-CMA has been proposed as a control algorithm for such an approach. However, when this approach is applied to an actual communication system, there arises the problem that the narrow-band filter in the receiver prevents M-CMA from converging to the desired solution. In this paper, in order to effectively operate an M-CMA adaptive array in the presence of a narrow-band filter, a configuration is proposed in which polyphase filters are used as narrow-band filters. Its superior interference suppression capability is confirmed by a theoretical analysis and computer simulation. © 2002 Wiley Periodicals, Inc. Electron Comm Jpn Pt 1, 85(12): 53–64, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/ecja.10021

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