Title :
Convergence and stability analysis of a synchronous adaptive CDMA-based PCS receiver
Author :
Zhu, Bin ; Ansari, Nirwan ; Siveski, Zoran ; Bar-Ness, Yeheskel
Author_Institution :
Dept. of Electr. & Comput. Eng., New Jersey Inst. of Technol., Newark, NJ, USA
Abstract :
A thorough investigation on the convergence and stability of an adaptive synchronous CDMA receiver is presented. The receiver consists of a decorrelator at the first stage and an adaptive interference canceler at the second stage. By using a steepest descent algorithm to adaptively control the weights, the knowledge of the users´ received powers is no longer required. It is shown that the system has good “near-far” resistance, and can approach optimum performance when the interfering users SNRs are high. Sufficient conditions for the receiver to achieve convergence are derived, and their properties are analyzed
Keywords :
adaptive signal detection; code division multiple access; convergence; correlation methods; interference suppression; personal communication networks; radio receivers; radiofrequency interference; stability; adaptive interference canceler; convergence; decorrelator; interfering users; near-far resistance; optimum performance; received power; stability analysis; steepest descent algorithm; synchronous adaptive CDMA-based PCS receiver; Computational complexity; Convergence; Covariance matrix; Decorrelation; Detectors; Interference cancellation; Multiaccess communication; Performance analysis; Personal communication networks; Stability analysis;
Conference_Titel :
Military Communications Conference, 1994. MILCOM '94. Conference Record, 1994 IEEE
Conference_Location :
Fort Monmouth, NJ
Print_ISBN :
0-7803-1828-5
DOI :
10.1109/MILCOM.1994.473980
