Title :
Parallel interference cancellation with reduced complexity for multi-carrier spread-spectrum FCDMA
Author :
Nahler, Achim ; Irmer, Ralf ; Fettweis, Gerhard P.
Author_Institution :
Tech. Univ. Dresden, Germany
Abstract :
The performance of code division multiple access (CDMA) systems is limited by multiple access interference (MAI) which can be overcome by multi-user detection schemes. Interference cancellation seems to be a good compromise in terms of performance and computational complexity compared to optimum multi-user detection or linear transformations e.g. based on the MMSE criterion. In this paper, the performance and complexity of parallel interference cancellation (PIC) are investigated for a multi-carrier spread-spectrum frequency code division multiple access (MC-SS FCDMA) system. Evaluating the structure of MAI, the PIC is modified to reduce its complexity to the order of the single-user detector while keeping the bit error rate in the range of the conventional PIC value
Keywords :
code division multiple access; computational complexity; error statistics; frequency division multiple access; interference suppression; least mean squares methods; multiuser channels; radiofrequency interference; signal detection; spread spectrum communication; BER; MAI; MMSE criterion; RAKE receiver; bit error rate; code division multiple access; frequency code division multiple access; linear transformations; multi-carrier spread-spectrum; multi-carrier spread-spectrum FCDMA; multi-user detection; multiple access interference; optimum multi-user detection; parallel interference cancellation; performance; reduced computational complexity; single-user detector; transmission model; Bit error rate; Computational complexity; Detectors; Interference cancellation; Mobile communication; Multiaccess communication; Multiple access interference; Multiuser detection; Signal processing algorithms; Spread spectrum communication;
Conference_Titel :
Spread Spectrum Techniques and Applications, 2000 IEEE Sixth International Symposium on
Conference_Location :
Parsippany, NJ
Print_ISBN :
0-7803-6560-7
DOI :
10.1109/ISSSTA.2000.876455
