Title :
Multiuser detectors with decision feedback for asynchronous spread-spectrum multiple access in multipath fading channels
Author :
Skelton, Benjamin C. ; Taylor, Desmond P.
Author_Institution :
Dept. of Electr. & Electron. Eng., Canterbury Univ., Christchurch, New Zealand
fDate :
4/1/2001 12:00:00 AM
Abstract :
This paper extends earlier work of the authors to the multipath fading channel. For a normalized Doppler spread of fDT=0.005 we show that a reduced state sequence estimation reduced-complexity receiver with Ks=2 users per state and a processing gain of N s=127 performs only 0.5 dB worse than the single-user receiver for a bit-error rate of 10-4
Keywords :
fading channels; feedback; multi-access systems; multipath channels; multiuser channels; radio receivers; signal detection; spread spectrum communication; BER; asynchronous spread-spectrum multiple access; bit-error rate; decision feedback; multipath fading channels; multiuser detectors; normalized Doppler spread; processing gain; reduced state sequence estimation receiver; reduced-complexity receiver; Bit error rate; Detectors; Fading; Feedback; Multiaccess communication; Multiuser detection; Performance gain; RAKE receivers; Spread spectrum communication; State estimation;
Journal_Title :
Communications, IEEE Transactions on
