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In this paper, a Frequency Domain Adaptive Antenna Array (FD-AAA) algorithm is proposed for the uplink detection in the broadband single-carrier multiple access system. By employing AAA in the frequency domain, the detector is able to suppress both the Inter-Chip Interference (ICI) and the Multi-User Interference (MUI). Comparison between the proposed FDAAA algorithm and the Frequency Domain Receive Diversity Combining (FD-RDC) algorithm is made through simulation. It is shown that when there is no MUI, the Bit Error Rate (BER) performances of the two algorithms are close to each other, i.e., the proposed algorithm can achieve the same frequency diversity gain and receive diversity gain as the FD-RDC algorithm does.
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