Title :
CDMA packet recognition and signal acquisition using LMS-based adaptive receiver
Author :
Kume, T. ; Yamazato, T. ; Ban, K. ; Okada, H. ; Katayama, M.
Author_Institution :
Dept. of Inf. Electron., Nagoya Univ., Japan
Abstract :
In this paper, we propose a new packet recognition and signal acquisition scheme with an adaptive linear filter based on a least mean square (LMS) algorithm for code-division multiple access (CDMA) packet systems. In CDMA systems, conventional receivers with matched filtering suffer from the near-far problem due to multiple access interference (MAI). In general, closed-loop power control is used in order to reduce the influence of the near-far problem. However, closed-loop power control is unsuitable for packet systems. Hence, in order to eliminate the influence of the near-far problem, we focus on an adaptive receiver based on an LMS algorithm for packet recognition and signal acquisition in CDMA packet systems.
Keywords :
adaptive estimation; adaptive filters; adaptive signal detection; code division multiple access; interference suppression; least mean squares methods; mobile radio; packet radio networks; radio receivers; CDMA; LMS; MAI; adaptive linear filter; adaptive receiver; code-division multiple access; least mean square algorithm; multiple access interference; near-far problem; packet recognition; signal acquisition; AWGN; Adaptive filters; Filtering; Least squares approximation; Matched filters; Multiaccess communication; Multiple access interference; Nonlinear filters; Power control; Timing;
Conference_Titel :
Wireless Communications and Networking Conference, 2002. WCNC2002. 2002 IEEE
Print_ISBN :
0-7803-7376-6
DOI :
10.1109/WCNC.2002.993525
