Title :
Power allocation, decoding order and spectral efficiency of successive interference cancellation based multirate DS-CDMA systems
Author :
Li, Husheng ; Poor, H. Vincent
Author_Institution :
Dept. of Electr. Engineerin.o, Princeton Univ., NJ, USA
fDate :
29 Nov.-3 Dec. 2004
Abstract :
The paper considers the analysis of successive interference cancellation (SIC) based multirate DS-CDMA systems. Power allocation in the context of various detection and decoding schemes, including SIC-MMSE and group SIC (GSIC), is discussed. Optimal decoding order for these schemes is analyzed. Spectral efficiency in both non-fading and frequency flat fading channels is discussed by obtaining explicit expressions for minimum energy per bit and spectral slope, and the results are compared with a multi-code scheme.
Keywords :
code division multiple access; decoding; fading channels; interference suppression; least mean squares methods; multiuser detection; radiofrequency interference; spread spectrum communication; SIC-MMSE; decoding order; energy per bit; frequency flat fading channels; group SIC; multi-code scheme; multirate DS-CDMA; multiuser detection; nonfading channels; power allocation; spectral efficiency; spectral slope; successive interference cancellation; Computational efficiency; Fading; Frequency; Interference cancellation; Maximum likelihood decoding; Multiaccess communication; Multiple access interference; Multiuser detection; Performance loss; Silicon carbide;
Conference_Titel :
Global Telecommunications Conference, 2004. GLOBECOM '04. IEEE
Print_ISBN :
0-7803-8794-5
DOI :
10.1109/GLOCOM.2004.1378870
