Title :
Superresolution algorithms for detecting overlapped paths in DS-CDMA systems with long codes
Author :
Lohan, Elena-Simona ; Hamila, Ridha ; Renfors, Markku
Author_Institution :
Inst. of Commun. Eng., Tampere Univ. of Technol., Finland
Abstract :
The problem of closely-spaced paths in DS-CDMA systems is a challenging task at the baseband receiver for applications such as mobile location and RAKE receivers. Previously, we introduced a method based on Teager-Kaiser (1990) operator for resolving paths spaced at less than one chip distance. We compare the performance of TK operator with that of the subspace based MUSIC (multiple signal classification) algorithm. In order to make a fair comparison, an extension of MUSIC algorithm to the systems with long codes is derived and the performance of both algorithms is assessed via simulations.
Keywords :
code division multiple access; codes; land mobile radio; multipath channels; multiuser channels; radio receivers; signal classification; signal resolution; spread spectrum communication; DS-CDMA systems; Teager-Kaiser operator; baseband receiver; chip distance; closely-spaced paths; direct sequence spread spectrum; mobile location; multipath propagation; multiple signal classification; overlapped paths detection; rake receivers; simulations; subspace based MUSIC algorithm; superresolution algorithms; Additive white noise; Classification algorithms; Delay; Gaussian noise; Multiaccess communication; Multiple signal classification; Pulse shaping methods; Shape; Signal resolution; Spread spectrum communication;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2002. The 13th IEEE International Symposium on
Print_ISBN :
0-7803-7589-0
DOI :
10.1109/PIMRC.2002.1045512
