Journal Article10.1109/isssta.2006.311748
Multirate Multiuser DS/CDMAwithGenetic Algorithm Detection inMultipath Channels
F. Ciriaco,E. Politécnica +1 more
TL;DR: Multirate multiuser DS/CDMA with GA-MC-MuD detection in multipath channels provides a viable option for user detection based on genetic algorithm and multicarrier direct sequence codedivision multiple access. The algorithm complexity is comparable with the optimum multiuser detection and exhibits promising performance results under hostile channel conditions and severe system operation.
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Abstract: Thisworkanalyses a heuristic algorithm basedthesameuserareorthogonal; thespreading stage offers some onthegenetic evolution theory applied tomultirate multicode multiple access interference (MAI)rejection andprovides the (MC)direct sequence codedivision multiple access (DS/CDMA)identification ofeachDS/CDMA user.Assuming that thek-th multiuser detection (GA-MC-MuD) inmultipath fading channels. . . () Monte-Carlo simulation results, intwomultirate conditions, useradopts BPSKmodulaton forallofitsm(g waveforms, showed thatthedetection basedonGA isaviable option when eachtransmitted signal canbeexpressed as(7): compared withtheoptimumMuD (OMuD). Evenunderhostile m(g) channel conditions andsevere system operation (loading and (g)(t) b - 9)(g)s(t iT) (2) errors inthechannel coefficients andamplitudes estimates) the GA-MC-MuDperformance results arepromising. TheGA-MC- MuD algorithm complexity isdetermined andcompared withwhuere is heino ed cnt theOMuD basedontherequired numberofcomputational k-thuserisdefined by: operations, showing anexpressive improvement intermsof t 1 F(g)1 (g) (g) l complexity-performance trade-off whencompared withtheRake SCk() IsCk1(t), SC 2 SCk() (tg) (3) ~~~~~channel chrips vectorII1) iSattributed fromaunique setof offbetween convergence speed andcomplexity. Inspite of Walsh-Hadamard (WH)sequences withlength NC > M(G) existence ofseveral worksusing approximative procedures for t f ( c thesub-optimum MuD,mostofinvestigations arerestricted to rateri(bi RhAforst me MC user
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