Title :
Semi-blind signal separation for collision resolution in wireless ad-hoc networks
Author :
Zhao, Qing ; Tong, Lang
Author_Institution :
Sch. of Electr. Eng., Cornell Univ., Ithaca, NY, USA
fDate :
6/21/1905 12:00:00 AM
Abstract :
Two new signal processing based collision resolution techniques for wireless ad-hoc networks are proposed. Without assuming the knowledge of the propagation channel and signal waveform, the proposed algorithms are capable of separating collided packets by exploiting channel diversities and partially known symbols in data packets. The algorithms can be applied to various narrow band and spread spectrum systems
Keywords :
code division multiple access; fading channels; intersymbol interference; least squares approximations; multipath channels; packet radio networks; prediction theory; signal processing; smoothing methods; spread spectrum communication; CDMA; ISI; channel diversities; collided packets separation; collision resolution; data packets; multi-access interference; multipath fading; narrow band systems; semi-blind forward-backward prediction; semi-blind least squares smoothing; semi-blind signal separation; signal processing; spread spectrum systems; wireless ad-hoc networks; Ad hoc networks; Fading; Intelligent networks; Intersymbol interference; Least squares methods; Multiaccess communication; Signal processing algorithms; Signal resolution; Smoothing methods; Source separation;
Conference_Titel :
Military Communications Conference Proceedings, 1999. MILCOM 1999. IEEE
Conference_Location :
Atlantic City, NJ
Print_ISBN :
0-7803-5538-5
DOI :
10.1109/MILCOM.1999.822688
