Observations on jointly optimal detection for multi-rate DS/CDMA systems

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.

[1]  Mahesh K. Varanasi,et al.  Group detection for synchronous Gaussian code-division multiple-access channels , 1995, IEEE Trans. Inf. Theory.

[2]  Roy D. Yates,et al.  Decorrelating Detectors for a Dual Rate Synchronous DS/CDMA System , 1999, Proceedings of Vehicular Technology Conference - VTC.

[3]  I Chih-Lin,et al.  Multi-code CDMA wireless personal communications networks , 1995, Proceedings IEEE International Conference on Communications ICC '95.

[4]  Sergio Verdú,et al.  Minimum probability of error for asynchronous Gaussian multiple-access channels , 1986, IEEE Trans. Inf. Theory.

[5]  Thomas Ketseoglou,et al.  Mobile access to an ATM network using a CDMA air interface , 1994, IEEE J. Sel. Areas Commun..

[6]  Weimin Zhang,et al.  Multiple Access Options for Multi-Media Wireless Systems , 1993 .

[7]  Arne Svensson,et al.  Successive interference cancellation in multiple data rate DS/CDMA systems , 1995, 1995 IEEE 45th Vehicular Technology Conference. Countdown to the Wireless Twenty-First Century.