Title :
Windowing for multicarrier CDMA systems
Author :
Tseng, Shun-Te ; Lehnert, James S.
Author_Institution :
Realtek Semicond. Corp., Hsinchu, Taiwan
fDate :
10/1/2009 12:00:00 AM
Abstract :
The windows for achieving good multiple-access performance of multicarrier code-division multiple-access (MCCDMA) systems employing minimum mean-squared error receivers are studied. The mean-squared error (MSE) is used as the performance metric for the optimization. In a simplified two-user system, the rectangular window is found to be optimum while regarded as an inferior window in orthogonal frequency-division multiplexing systems because of its spectral inefficiency. Necessary conditions are given for improving the performances of spectrally efficient windows by exploiting the cyclic prefix and oversampling in the frequency domain.
Keywords :
code division multiple access; mean square error methods; optimisation; cyclic prefix; frequency domain; minimum mean-squared error receiver; multicarrier CDMA systems; multicarrier code-division multiple-access systems; multiple-access performance; necessary condition; optimization; orthogonal frequency-division multiplexing systems; performance metric; two-user system; Digital filters; Frequency domain analysis; Measurement; Military computing; Modulation coding; Multiaccess communication; Multicarrier code division multiple access; Multiple access interference; OFDM modulation; Wave functions; MC-CDMA; MMSE; multiple-access interference; windowing;
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOMM.2009.10.060625
