Iterative (Turbo) Joint Rate and Data Detection in Coded CDMA Networks
A convolutionally coded CDMA data network wherein each user may transmit at one out of a set of possible data rates is considered in this chapter. The problem of joint detection of the data-rate of each user and of the corresponding information symbols is considered. In particular, it is shown here that the so-called turbo principle can be used also for joint rate and data detection, and indeed an iterative (turbo) procedure is derived wherein the single-user decoders, and the datarate detectors for each user exchange information in order to achieve lower and lower detection error probabilities. Numerical results show that the proposed approach is effective and achieves satisfactory performance.
KeywordsMinimum Mean Square Error Data Detection Information Symbol CDMA System Multiple Access Interference
Unable to display preview. Download preview PDF.
- 3.G. Yang and S. Kellel, “Optimal frame rate detection for CDMA mobile sta-tions with variable-rate data transmission,” Proc. of 1999 Fifth Asia-Pacific Conf. Commun. and Fourth Optoelectron. and Commun. Conf., Bejing, China, October 1999Google Scholar
- 4.I. Held and A. Chen, “Reduced complexity blind rate detection for second and third generation cellular CDMA systems,” Proc. 1999 IEEE Global Commun. Conf. (GLOBECOM ’99), Rio de Janeiro (Brasil), December 1999Google Scholar
- 7.S. Buzzi and S. Sardellitti, “Joint rate and data detection in variable-rate CDMA systems,” Proc. of IEEE Radio and Wireless Symp. (RWS ’06), San Diego (CA), USA, January 2006Google Scholar
- 8.S. Buzzi and S. Sardellitti, “Blind MMSE-based receivers for rate and data detection in variable-rate CDMA systems,” Proc. of the 14th European Signal Process. Conf., Florence, Italy, September 2006Google Scholar
- 10.N. Noels et al., “Turbo synchronization: an EM algorithm interpretation,” Proc. of 2003 IEEE Int. Conf. Commun. (ICC 2003), Vol. 4, pp. 2933-2937, May 2003Google Scholar