Implementation issues of multiuser detection in CDMA communication systems

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dc.contributor.advisorCavallaro, Joseph R.
dc.creatorXu, Gang
dc.date.accessioned2009-06-04T08:13:02Z
dc.date.available2009-06-04T08:13:02Z
dc.date.issued1999
dc.description.abstractMultistage 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.extent58 p.en_US
dc.format.mimetypeapplication/pdf
dc.identifier.callnoTHESIS E.E. 1999 XU
dc.identifier.citationXu, Gang. "Implementation issues of multiuser detection in CDMA communication systems." (1999) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/17315">https://hdl.handle.net/1911/17315</a>.
dc.identifier.urihttps://hdl.handle.net/1911/17315
dc.language.isoeng
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.
dc.subjectElectronics
dc.subjectElectrical engineering
dc.titleImplementation issues of multiuser detection in CDMA communication systems
dc.typeThesis
dc.type.materialText
thesis.degree.departmentElectrical Engineering
thesis.degree.disciplineEngineering
thesis.degree.grantorRice University
thesis.degree.levelMasters
thesis.degree.nameMaster of Science
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