Title :
Structure of replica-symmetric solutions for randomly-spread CDMA
Author :
Tanaka, Toshiyuki
Author_Institution :
Fac. of Syst. Design, Tokyo Metropolitan Univ.
Abstract :
This paper investigates the structure of the replica-symmetric (RS) solutions for randomly-spread CDMA obtained with the replica method. The objective of this investigation is to resolve the apparent inconsistency observed between the RS solutions for the individually-optimum (IO) detection and those for the jointly-optimum (JO) detection: They appear to be inconsistent with each other in the limit of high signal-to-noise ratio. Our result reveals that the RS solutions have a complex structure at high-SNR regime, which has been mostly overlooked in the literature
Keywords :
Bayes methods; code division multiple access; information theory; random processes; symmetry; SNR; individually-optimum detection; jointly-optimum detection; randomly-spread CDMA; replica-symmetric solutions; Baseband; Communication channels; Equations; Gaussian noise; Information analysis; Multiaccess communication; Parity check codes; Performance analysis; Signal resolution; Signal to noise ratio;
Conference_Titel :
Information Theory, 2005. ISIT 2005. Proceedings. International Symposium on
Conference_Location :
Adelaide, SA
Print_ISBN :
0-7803-9151-9
DOI :
10.1109/ISIT.2005.1523321
