Title :
Modified LMMSE turbo equalization
Author :
Jiang, Sen ; Ping, Li ; Sun, Hong ; Leung, Chi Sing
Author_Institution :
Sch. of Electron. Inf., Wuhan Univ., China
fDate :
3/1/2004 12:00:00 AM
Abstract :
This letter presents a modified linear minimum mean square error (LMMSE) turbo equalization scheme that uses an augmented real matrix representation for quadrature modulation systems. In the proposed scheme, the estimates of the two quadrature components of the transmitted symbol have both their individual variances and their covariance considered. Hence, the new scheme is able to achieve a significant performance improvement while retaining a complexity similar to that of the existing LMMSE turbo equalization scheme.
Keywords :
equalisers; intersymbol interference; iterative methods; least mean squares methods; modulation; turbo codes; ISI; LMMSE; augmented real matrix representation; covariance; intersymbol interference; iterative methods; modified linear minimum mean square error turbo equalization scheme; quadrature modulation systems; transmitted symbol; variances; Covariance matrix; Degradation; Digital communication; Equalizers; Intersymbol interference; Iterative decoding; Iterative methods; Mean square error methods; Sun; Turbo codes;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2004.823434
