00000cab a22000003a 4500 UP-99796217609350957 Buklod 20231007234448.0 m |o d | ta 100623s xx d | ||r ||||| || DENGII eng Rainbolt, B.J. Multicarrier CDMA for cellular overlay systems. pp. 1807-1814 A code-division multiple access (CDMA) cellular overlay system is investigated, employing the idea of multicarrier CDMA, which has previously received significant attention as an alternative to traditional single-carrier CDMA. Overlay is pursued here as a means of long-term transition from narrowband cellular to CDMA cellular. A major result of this paper is the demonstration that the use of multicarrier CDMA in a fading channel is particularly beneficial to the narrowband system, as the CDMA users can reduce their transmitted powers as a result of diversity. Another significant conclusion is that the use of transmitter notching in the CDMA system in order to avoid active narrowband users outperforms a strategy in which a narrowband user is avoided by simply dropping the particular carrier which overlays it. Finally, results on the use of the minimum mean-squared error (MMSE) receiver in a fading channel are extended for use in the overlay scenario BER. CDMA cellular. MMSE receiver. Capacity limits. Cellular overlay systems. Code-division multiple access. Diversity. Fading channels. Minimum mean-squared error. Multiaccess interference. Multicarrier CDMA. Narrowband cellular. Narrowband interference. Narrowband system. Notch filtering. Transmitter notching. IEEE Journal on selected areas in communications 17, 10 (1999). FO UPD DENG-II Article