DocumentCode :
1856847
Title :
Design and multiplier-less realization of matched filters with variable fractional delay for software radio receivers
Author :
Chan, S.C. ; Tsui, K.M.
Author_Institution :
Dept. of Electr. & Electron. Eng., Hong Kong Univ., China
Volume :
2
fYear :
2004
fDate :
25-28 July 2004
Abstract :
This paper studies the design and multiplier-less realization of variable fractional delay matched filters (VFD-MFs), which provide matching filtering and variable fractional delay of the filter output. It offers greater flexibility and lower delay in symbol-timing adjustment than directly cascading a match filter with a fractional delayer. The design of VFD-MFs, which can be viewed as a variable digital filter (VDF) design problem subject to the matched filtering condition, is formulated as a second order cone programming (SOCP) problem with least square design criteria. The proposed VFD-MFs can be efficiently implemented using the Farrow structure. By employing sum-of-power-of-two (SOPOT) coefficients and the multiplier block (MB) technique, very efficient multiplier-less realization of the VFD-MF with low hardware complexity is obtained. A design example is given to demonstrate the effectiveness of the proposed approach.
Keywords :
delays; digital filters; least squares approximations; matched filters; radio receivers; Farrow structure; filter output; fractional delayer; hardware complexity; least square design criteria; matched filters; matching filtering; multiplier block technique; multiplier-less realization; second order cone programming; software radio receivers; sum-of-power-of-two coefficients; symbol-timing adjustment; variable digital filter; variable fractional delay; Delay systems; Digital filters; Filtering; Hardware; Least squares approximation; Least squares methods; Matched filters; Receivers; Software radio; Timing;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Circuits and Systems, 2004. MWSCAS '04. The 2004 47th Midwest Symposium on
Print_ISBN :
0-7803-8346-X
Type :
conf
DOI :
10.1109/MWSCAS.2004.1354167
Filename :
1354167
Link To Document :
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