Title :
Comparative analysis of conventional and multiuser detectors in multisensor receivers
Author :
Juntti, Markku J. ; Lilleberg, Jorma O.
Author_Institution :
Oulu Univ., Finland
Abstract :
Multiuser detection has been proposed to improve the performance of direct-sequence spread-spectrum code-division multiple-access (DS-CDMA) systems. Use of multiple sensors (antenna elements or base stations) can be used to improve the signal-to-noise ratio and counter the effects of fading in any communication system. In this paper, multisensor multiuser detection is analyzed. It is shown by analysis and numerical examples that the use of multiple sensors averages the multiple-access interference (MAI) out towards zero even without multiuser detection. The performance of linear multisensor receivers with and without multiuser detection is analyzed and compared. The examples show that relatively good performance can be obtained without multiuser detection with moderate number of users and under a reasonable near-far problem
Keywords :
array signal processing; cellular radio; code division multiple access; radio receivers; radiofrequency interference; signal detection; spread spectrum communication; DS-CDMA; antenna elements; base stations; direct-sequence spread-spectrum code-division multiple-access; fading; linear multisensor receivers; multiple sensors; multiple-access interference; multisensor multiuser detection; multisensor receivers; multiuser detection; multiuser detectors; near-far problem; performance; signal-to-noise ratio; Base stations; Counting circuits; Detectors; Fading; Multiaccess communication; Multiple access interference; Multiuser detection; Sensor systems; Signal to noise ratio; Spread spectrum communication;
Conference_Titel :
MILCOM 97 Proceedings
Conference_Location :
Monterey, CA
Print_ISBN :
0-7803-4249-6
DOI :
10.1109/MILCOM.1997.648725
