Abstract
In this paper, the performance of the downlink multicode CDMA systems with bit interleaved coded multi-level quadrature amplitude modulation (BIC-MQAM) is studied with the consideration of interference cancellation. Generally, multicode transmission and adaptive multi-level modulation are used for flexible data rate transmissions in CDMA systems. In order to improve the system performance, multistage parallel interference cancellation and soft decision Viterbi decoding techniques are employed at the receiver. An analytical closed form of bit error rate (BER) is derived in presence of pilot channel estimation error due to multipath interference. Numerical results show that by using interference cancellation, the multipath interference can be effectively reduced, which leads to significant performance improvement even in presence of both channel estimation error and multipath interference. Also, system throughput can be increased by using high-order modulation without extra bandwidth expansion.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
