Paper Info
Title
Impulse response shortening for discrete multitone transceivers
Abstract
In discrete multitone (DMT) transceivers an intelligent guard time sequence, called a cyclic prefix (CP), is inserted between symbols to ensure that samples from one symbol do not interfere with the samples of another symbol. The length of the CP is determined by the length of the impulse response of the effective physical channel. Using a long CP reduces the throughput of the transceiver. To avoid using a long CP, a short time-domain finite impulse response (FIR) filter is used to shorten the Effective channels impulse response.This paper explores various methods of determining the coefficients for this time-domain filter. An optimal shortening and a least-squares (LS) approach are developed for shortening the channel's impulse response, To provide a computationally efficient algorithm a variation of the LS approach is explored. In full-duplex transceivers the length of the effective echo path impacts the computational requirements of the transceiver, A new paradigm of joint shortening is introduced and three methods are developed to jointly shorten the channel and the echo impulse responses in order to reduce the length of the CP and reduce computational requirements for the echo canceller.
Year
DOI
Venue
1996
10.1109/26.545896
IEEE Transactions on Communications
Keywords
DocType
Volume
FIR filters,echo suppression,least squares approximations,transceivers,FIR filter,computationally efficient algorithm,cyclic prefix,discrete multitone transceivers,echo canceller,effective echo path,effective physical channel,full-duplex transceivers,impulse response shortening,intelligent guard time sequence,least-squares approach,short time-domain finite impulse response filter,throughput
Journal
44
Issue
ISSN
Citations 
12
0090-6778
151
PageRank 
References 
Authors
13.38
5
3
Search Limit
100151
Name
Order
Citations
PageRank
P. J. W. Melsa115316.04
R. C. Younce215316.04
C. E. Rohrs315717.69