Title :
System concept comparisons for multirate CDMA with multiuser detection
Author :
Juntti, Markku J.
Author_Institution :
Telecommun. Lab., Oulu Univ., Finland
Abstract :
The decorrelating multiuser detector for asynchronous multirate multiuser code-division multiple-access (CDMA) systems is analyzed. A multirate CDMA system model able to fit several system concepts in the same framework is presented. The performance of the multi-code (MC) system with one processing gain and a multiple processing gain (MPG) system is compared. Lower bounds for the expected value of the asymptotic multiuser efficiency of a synchronous multirate CDMA system with three effective users are derived for a system with one and two processing gains. The numerical results show that the performance of the decorrelating detector for MC and MPG systems do not differ significantly
Keywords :
cellular radio; code division multiple access; correlators; land mobile radio; pseudonoise codes; signal detection; spread spectrum communication; synchronisation; asymptotic multiuser efficiency; asynchronous CDMA systems; cellular mobile communication systems; decorrelating detector; decorrelating multiuser detector; lower bounds; multi-code system; multiple processing gain; multirate CDMA; multiuser detection; one processing gain; performance; system concept comparisons; two processing gains; Bit error rate; Decorrelation; Detectors; Land mobile radio cellular systems; Mobile communication; Multiaccess communication; Multiuser detection; Performance gain; Telecommunications; Time division multiplexing;
Conference_Titel :
Vehicular Technology Conference, 1998. VTC 98. 48th IEEE
Print_ISBN :
0-7803-4320-4
DOI :
10.1109/VETEC.1998.686468
