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Some results in the theory of crosstalk-free transmultiplexers

Koilpillai, R. David and Nguyen, Truong Q. and Vaidyanathan, P. P. (1991) Some results in the theory of crosstalk-free transmultiplexers. IEEE Transactions on Signal Processing, 39 (10). pp. 2174-2183. ISSN 1053-587X. http://resolver.caltech.edu/CaltechAUTHORS:KOIieeetsp91

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Abstract

The crosstalk-free transmultiplexer (CF-TMUX) focuses on crosstalk cancellation (CC) rather than on suppressing it. The authors present an analysis of the CF-TMUX based on the polyphase component matrices of the filter banks used in TDM→FDM and FDM→TDM conversions, respectively. Thus a necessary and sufficient condition for complete CC is obtained. It is shown that the filters for a CF-TMUX are the same as the filters for a 1-skewed alias free QMF bank. In addition, if the QMF bank satisfies the perfect reconstruction (PR) property, then the TMUX also satisfies PR. The relation between CF-TMUX filters and alias-free QMF banks is used to obtain a direct design procedure for CF-TMUX filters (both FIR and IIR). It is also shown that approximately crosstalk-free TMUX filters can be obtained from any approximately alias-free QMC bank. Design examples and comparison tables are included.


Item Type:Article
Additional Information:© Copyright 1991 IEEE. Reprinted with permission. Manuscript received December 27, 1989; revised September 27, 1990. This work was supported in part by the National Science Foundation under Grants DCI 85 52579 and MIP 86 04456, and matching funds from Hughes Aircraft Co. and Tektronic, Inc.
Record Number:CaltechAUTHORS:KOIieeetsp91
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:KOIieeetsp91
Alternative URL:http://dx.doi.org/10.1109/78.91174
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:6849
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:27 Dec 2006
Last Modified:26 Dec 2012 09:25

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