A Newly High-Speed MCMA Algorithm for QAM System

Author

Jiang, Zhixiang ; Zhang, Meng ; Li, Zichuang ; Lu, Shengli

Author_Institution

Nat. ASIC Syst. Eng. Res. Center, Southeast Univ., Nanjing

fYear

2008

fDate

12-14 Oct. 2008

Firstpage

1

Lastpage

4

Abstract

A newly modified CMA algorithm: Stop-and-Go-DD- LMS CMA (SGD-CMA) for quadrature amplitude modulation (QAM) signals is presented. It integrates conventional constant modulus algorithm (CMA) and decision-direct least-mean-square (DD-LMS) under Stop-and-Go principle. The SGD-CMA equalizer performs six times faster, rudimental MSE 3~5 dB better than CMA, corrects a final phase ambiguity and decreases 82% of operation complexity while compared to the CMA+DD- LMS equalizer increasing little hardware consumption. It is especially fit for Decision Feedback Equalization (DFE) structure. Simulations support SGD-CMA on all performance and characteristics, validating its feasibility and advantages.

Keywords

automatic repeat request; decision feedback equalisers; least mean squares methods; quadrature amplitude modulation; signal processing; QAM system; SGD-CMA equalizer; constant modulus algorithm; decision feedback equalization; decision-direct least-mean-square; high-speed MCMA algorithm; quadrature amplitude modulation signals; stop-and-go-DD-LMS CMA; Application specific integrated circuits; Blind equalizers; Convergence; Cost function; Decision feedback equalizers; Field-flow fractionation; Hardware; IIR filters; Quadrature amplitude modulation; Systems engineering and theory;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications, Networking and Mobile Computing, 2008. WiCOM '08. 4th International Conference on

Conference_Location

Dalian

Print_ISBN

978-1-4244-2107-7

Electronic_ISBN

978-1-4244-2108-4

Type

conf

DOI

10.1109/WiCom.2008.443

Filename

4678352