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Evaluation of coded CDMA with interference cancellation

Pål Frenger (Institutionen för signaler och system, Kommunikationssystem) ; Pål Orten (Institutionen för signaler och system, Kommunikationssystem) ; Tony Ottosson (Institutionen för signaler och system, Kommunikationssystem)
Proceedings IEEE Vehicular Technology Conference, Houston, Texas p. 642-647. (1999)
[Konferensbidrag, refereegranskat]

The performance of an asynchronous CDMA system (up-link) employing very low-rate maximum free distance codes for combined coding and spreading is analyzed when successive or parallel interference cancellation is applied. An analytical approach to the evaluation of the bit error rate is presented and shown to give results close to simulations. Our results show that the code-spread system outperforms the conventionally coded and spread system. Without interference cancellation the single-user bound is never reached (except for one user). With two stages of parallel interference cancellation, a code-spread system with a load only slightly less than 1 bit/chip can obtain a bit error rate very close to that of a single-user system.

Nyckelord: CDMA; low-rate convolutional codes; orthogonal codes; successive interference cancellation; parallel interference cancellation; rate-compatible; maximum free distance

Denna post skapades 2006-09-12. Senast ändrad 2013-06-17.
CPL Pubid: 15991


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Institutioner (Chalmers)

Institutionen för signaler och system, Kommunikationssystem


Information Technology

Chalmers infrastruktur