A New Multiuser Detector with Low Decision Delay for Variable Processing Gain DS/CDMA Mobile Radio Systems

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In this paper, an efficient multiuser detection scheme with low decision delay is proposed for asynchronous variable processing gain (VPG) DS/CDMA systems in mobile radio channels without any restrictions on processing gains. An equivalent synchronous single bit rate DS/CDMA system is first formulated to break up the detection problem into the blocks of finite length called processing windows. A low delay multipath-combining decisionfeedback multiuser detector (LDMCDF) is then proposed based on the equivalent system model. Since the LDMCDF makes the decisions for data bits every processing window, the decision delay is less than the interval of one processing window. The effect of the processing window length on the performance of the LDMCDF is evaluated, and the simulation results show that the LDMCDF provides good performance with the negligible decision delay.
Publisher
IEEE
Issue Date
1999-09
Keywords

multiuser detector; Low Decision Delay; DS/CDMA Mobile Radio Systems

Citation

50th Vehicular Technology Conference (VTC 1999), Vol.5, pp.3004-3008

ISBN
0-7803-5435-4
DOI
10.1109/VETECF.1999.800338
URI
http://hdl.handle.net/10203/13010
Appears in Collection
EE-Conference Papers(학술회의논문)
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