Title :
Loosely synchronised spreading codes in full-time early-late tracking loops
Author :
Conti, Peter G. ; Gunawardana, Upul ; Liyana-Pathirana, Ranjith
Author_Institution :
Sch. of Eng. & Ind. Design, Western Sydney Univ., NSW, Australia
Abstract :
Loosely synchronous (LS) spreading codes are part of the proposed multi-code LAS-CDMA (large area synchronous-code division multiple access) systems for the 3rd and 4th generation of CDMA. LS codes contain a zero-correlation zone (ZCZ) in the correlation properties. In this paper an analysis of spreading sequences performance in a first order full-time early-late delay lock tracking loops (ELDLL) is presented. It is shown that compared to m-sequences, LS codes show no advantage in terms of code tracking in an additive white Gaussian noise (AWGN) or a multipath environment.
Keywords :
3G mobile communication; 4G mobile communication; AWGN channels; code division multiple access; m-sequences; multipath channels; 3rd generation CDMA; 4th generation CDMA; AWGN; additive white Gaussian noise; full-time early-late tracking loops; large area synchronous-code division multiple access; loosely synchronised spreading codes; m-sequences; multipath environment; zero-correlation zone; Additive white noise; Delay; Design engineering; Multiaccess communication; Performance analysis; Phase locked loops; Propulsion; Radio transmitters; Spread spectrum communication; Tracking loops;
Conference_Titel :
Radio and Wireless Symposium, 2006 IEEE
Print_ISBN :
0-7803-9412-7
DOI :
10.1109/RWS.2006.1615113
