Jihwan P. Choi

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—This paper examines the detection problem of the preamble sequence index in the WiMAX system. The mobile station receiver knows all the possible preamble sequences and should estimate which preamble sequence has been transmitted from the base station. Since the preamble in the orthogonal frequency division multiplexing (OFDM) transmission is usually the(More)
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. Abstract—In satellite communications, narrow spotbeams can provide high power(More)
— In this letter, we propose two simple OFDM mean delay estimation schemes, channel impulse response (CIR)-based and differential schemes, which are applicable for adaptive algorithms including improved channel estimation and fast handover. Instead of time-domain processing requiring additional inverse fast Fourier transform (IFFT), the mean delay can be(More)