DocumentCode :
2895495
Title :
An Efficient Finite Precision Realization of the Adaptive Decision Feedback Equalizer
Author :
Shaik, Rafiahamed ; Chakraborty, Mrityunjoy
Author_Institution :
Dept. of Electr. & Electron. Comput. Eng., Indian Inst. of Technol., Kharagpur
fYear :
2007
fDate :
27-30 May 2007
Firstpage :
1341
Lastpage :
1344
Abstract :
A scheme for efficient finite precision realization of the adaptive decision feedback equalizer using block floating point (BFP) arithmetic is presented. The scheme adopts separate BFP formats for the feed forward and the feedback filter weights and works out separate update relations for their respective mantissas and exponents. Care is taken to prevent overflow in all computations by using a dynamic scaling of the data and a carefully chosen upper bound for the step size mu. Since no block processing of the feedback input is possible, an efficient scheme is presented for block formatting the data stored in the feedback filter memory, at each time index. The proposed scheme mostly employs simple fixed point operations and achieves considerable speed up over its floating point counterpart.
Keywords :
adaptive equalisers; digital filters; feedback; floating point arithmetic; adaptive decision feedback equalizer; block floating point arithmetic; block formatting; data dynamic scaling; feedback filter memory; feedback filter weights; finite precision realization; Adaptive filters; Decision feedback equalizers; Dynamic range; Electronics packaging; Feeds; Field-flow fractionation; Floating-point arithmetic; Least squares approximation; Signal processing algorithms; Upper bound;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Circuits and Systems, 2007. ISCAS 2007. IEEE International Symposium on
Conference_Location :
New Orleans, LA
Print_ISBN :
1-4244-0920-9
Electronic_ISBN :
1-4244-0921-7
Type :
conf
DOI :
10.1109/ISCAS.2007.378420
Filename :
4252895
Link To Document :
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