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|Title:||Intercarrier interference suppression for OFDMA uplink in time and frequency selective Rayleigh fading channels|
|Citation:||Hou, S.,Ko, C.C. (2008). Intercarrier interference suppression for OFDMA uplink in time and frequency selective Rayleigh fading channels. IEEE Vehicular Technology Conference : 1438-1442. ScholarBank@NUS Repository. https://doi.org/10.1109/VETECS.2008.339|
|Abstract:||This paper investigates Inter-Carrier Interference (ICI) suppression for the uplink of an Orthogonal Frequency Division Multiple Access (OFDMA) system in a time and frequency selective Rayleigh fading channel. In such a doubly selective channel, channel variation within each OFDMA block disrupts the orthogonality among subcarriers, leading to ICI. We formulate the signal model for OFDMA uplink in a doubly selective Rayleigh fading channel, and then propose a MMSE and a MMSE Successive Detection (MMSE-SD) scheme to suppress ICI. It is shown that the MMSE scheme is the optimal linear scheme in terms of achievable data rate, while the MMSE-SD scheme is able to further remove ICI and exploit the Doppler diversity embedded in time-varying channels. Simulation results are presented to illustrate the performance improvements that can be obtained from using the proposed suppression schemes. © 2008 IEEE.|
|Source Title:||IEEE Vehicular Technology Conference|
|Appears in Collections:||Staff Publications|
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