Title :
Observations on jointly optimal detection for multi-rate DS/CDMA systems
Author_Institution :
Dept. of Electr. Eng., Ohio State Univ., Columbus, OH, USA
Abstract :
Multi-rate communication systems are considered for the transmission of direct-sequence code division multiple access wireless signals. Performance for jointly optimal detection is studied in the context of multi-code access where high data rate users multiplex their information streams onto multiple codes; and variable spreading length access where signature sequences of different lengths are assigned to users with different data rates. Preliminary results are obtained for various methods of jointly optimal detection for the variable spreading length system. In addition, asymptotic multi-user performance measures are calculated and bounded to compare performance of the two systems
Keywords :
code division multiple access; data communication; maximum likelihood detection; variable length codes; DS-CDMA systems; asymptotic multi-user performance measures; direct-sequence code division multiple access; high data rate users; information streams; jointly optimal detection; maximum likelihood detection; multi-code access; multi-rate communication systems; multiple codes; signature sequences; variable spreading length access; Bandwidth; Bit rate; Context; Data communication; Decorrelation; Degradation; Detectors; Interference cancellation; Multiaccess communication; Power control;
Conference_Titel :
Global Telecommunications Conference, 1996. GLOBECOM '96. 'Communications: The Key to Global Prosperity
Conference_Location :
London
Print_ISBN :
0-7803-3336-5
DOI :
10.1109/GLOCOM.1996.586788
