Title :
Comparison of attractive modulation schemes for the uplink in DS-CDMA systems
Author_Institution :
Ericsson Eurolab Deutschland GmbH, Nurnberg, Germany
Abstract :
Several modulation schemes combined with convolutional coding which are attractive for the uplink in DS-CDMA systems are compared based on the criterion of maximum power efficiency. It is shown for typical system assumptions that 2PSK either with pilot channel or with pilot symbols time-multiplexed with data symbols, and 64-ary orthogonal modulation combined with coherent demodulation lead to the highest power efficiency. If the receiver complexity is taken into account, the conclusion is that 2PSK is the most suitable modulation scheme for the uplink in typical DS-CDMA systems
Keywords :
code division multiple access; convolutional codes; demodulation; land mobile radio; modulation coding; phase shift keying; pseudonoise codes; radio links; radio receivers; spread spectrum communication; telecommunication channels; 2PSK; 64-ary orthogonal modulation; DS-CDMA systems; coherent demodulation; convolutional coding; data symbols; maximum power efficiency; mobile radio communications; modulation; performance; pilot channel; pilot symbols; receiver complexity; time-multiplexing; uplink; Channel estimation; Context; Convolutional codes; Demodulation; Downlink; Land mobile radio; Modulation coding; Multiaccess communication; Multiuser detection; Research and development;
Conference_Titel :
Vehicular Technology Conference, 1997, IEEE 47th
Conference_Location :
Phoenix, AZ
Print_ISBN :
0-7803-3659-3
DOI :
10.1109/VETEC.1997.600527
