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dc.contributor.advisor Cavallaro, Joseph R.
dc.creatorXu, Gang
dc.date.accessioned 2009-06-04T08:13:02Z
dc.date.available 2009-06-04T08:13:02Z
dc.date.issued 1999
dc.identifier.urihttps://hdl.handle.net/1911/17315
dc.description.abstract Multistage detectors have been accepted in designs for next generation CDMA base stations because they are less complex than some other multiuser detectors. In this thesis, we propose a differencing method to further reduce complexity. It achieves both high performance in the interference cancellation and computational efficiency. When interference cancellation converges, the difference of the detection vectors between two consecutive stages is mostly zero. We recode the estimation bits, mapping from $\pm1$ to 0 and $\pm2$. Bypassing all the zero terms saves computations. Multiplication by $\pm2$ can be easily implemented in hardware as arithmetic shifts. The system delay of a five-stage detector will be reduced by 75% with a satisfactory bit error rate. We also investigated fixed-point implementation issues and implemented this algorithm in a real-time system using both TI's TMS320C62 DSP and ASICs.
dc.format.extent 58 p.
dc.format.mimetype application/pdf
dc.language.iso eng
dc.subjectElectronics
Electrical engineering
dc.title Implementation issues of multiuser detection in CDMA communication systems
dc.type.genre Thesis
dc.type.material Text
thesis.degree.department Electrical and Computer Engineering
thesis.degree.discipline Engineering
thesis.degree.grantor Rice University
thesis.degree.level Masters
thesis.degree.name Master of Science
dc.identifier.citation Xu, Gang. "Implementation issues of multiuser detection in CDMA communication systems." (1999) Master’s Thesis, Rice University. https://hdl.handle.net/1911/17315.


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