Title :
Linear-Complex LAS Detectors Can Achieve Bit Error Rate of the NP-Hard Optimum Detector in Non-trivial Large Random Spreading CDMA
Author_Institution :
Dept. of Electr. Eng., City Univ. of New York, NY
Abstract :
In this paper, we demonstrate via simulation that the linear-complex LAS detectors can amazingly achieve the bit error rate of the NP-hard optimum global maximum likelihood (GML) multiuser detector in large random spreading CDMA systems where the number of users is over a thousand and the number of users per degree is less than 0.9. Moreover, the LAS detectors suggestively attain the optimum asymptotic multiuser efficiency, which only the NP-hard GML detector has been known to attain
Keywords :
code division multiple access; computational complexity; error statistics; maximum likelihood detection; multiuser detection; NP-hard optimum detector; bit error rate; global maximum likelihood multiuser detector; linear-complex LAS detectors; random spreading CDMA; Bit error rate; Cities and towns; Collaborative work; Detectors; Digital images; Error probability; Image restoration; Maximum likelihood detection; Multiaccess communication; Sun; Ad hoc networks; Sensor networks;
Conference_Titel :
ITS Telecommunications Proceedings, 2006 6th International Conference on
Conference_Location :
Chengdu
Print_ISBN :
0-7803-9587-5
Electronic_ISBN :
0-7803-9587-5
DOI :
10.1109/ITST.2006.288998
