Design of nonuniform filter bank transceivers for frequency selective channels
EURASIP Journal on Applied Signal Processing
Robustness of transmultiplexed images
VLSI Design
Robustness of transmultiplexed images
VLSI Design
2-norm-based iterative design of filterbank transceivers: a control perspective
Journal of Control Science and Engineering
Journal of Signal Processing Systems
Analog Integrated Circuits and Signal Processing
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The paper considers design of multichannel, nonuniform-band transmultiplexers. It is well known that using traditional building blocks-up and downsamplers and linear time-invariant (LTI), causal filters-nonuniform transmultiplexers typically do not achieve perfect reconstruction. To alleviate this, we propose to build nonuniform transmultiplexers using general dual-rate structures that provide more design freedom, and hence, perfect reconstruction can be achieved. Such general transmultiplexers have a new source of error called aliasing distortion in addition to the traditional cross-talk, magnitude, and phase distortions. We propose a composite error criterion that captures all four distortions in one. Using this error criterion as reconstruction performance measure. We develop an optimal design procedure and apply it to a three-channel nonuniform example, yielding an FIR transmultiplexer that has good frequency-limiting properties in the synthesis end and is very close to perfect reconstruction