A low-complexity KL expansion-based channel estimator for OFDM systems
EURASIP Journal on Wireless Communications and Networking - Special issue on advanced signal processing algorithms for wireless communications
EURASIP Journal on Applied Signal Processing
MAP channel-estimation-based PIC receiver for downlink MC-CDMA systems
EURASIP Journal on Wireless Communications and Networking - Multicarrier Systems
Finite Parameter Model for Doubly-Selective Channel Estimation in OFDM
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
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This paper derives a Karhunen-Loeve (K-L) expansion of the time-varying output of a multipath Rayleigh fading wide-sense-stationary uncorrelated-scattering (WSSUS) channel. It is shown that under the same mean-squared error condition, the number of terms required by the truncated K-L expansion is less than that of the series expansion obtained by using the discrete-path approximation of the channel so that simulation using the K-L expansion is more efficient. This computational advantage becomes more significant as higher simulation accuracy is required. The derived K-L expansion is applied to develop an efficient simulation technique for digital transmission over a multipath Rayleigh fading WSSUS channel using an optimum receiver. We show that the proposed technique requires shorter computation time than two other known simulation techniques