A DFE Structure Using Quadrature Components of 8-VSB Signals

In this paper, we present a decision feedback equalizer (DFE) that uses the quadrature components of 8-VSB signals in ATSC systems to mitigate multipath distortion efficiently. Unlike the conventional DFE structure for 8-VSB signals in which a real-valued feedback filter is used with real-valued dec...

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Bibliographic Details
Published in:IEEE transactions on broadcasting 2008-09, Vol.54 (3), p.394-400
Main Author: CHUNG, Wonzoo
Format: Article
Language:English
Subjects:
8-VSB
Algorithm design and analysis
Algorithms
Applied sciences
Broadcasting. Videocommunications. Audiovisual
Channels
Computer simulation
Decision feedback equalizer
Decision feedback equalizers
Detection, estimation, filtering, equalization, prediction
Distortion
Equalizers
Exact sciences and technology
Feedback
feedback sample generator
Hilbert transformation filter
IIR filters
Information, signal and communications theory
Multipath channels
Noise cancellation
Output feedback
Performance analysis
Quadratures
Recursive
Signal and communications theory
Signal generators
Signal processing
Signal, noise
Telecommunications
Telecommunications and information theory
Television
vestigial sideband
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Summary:In this paper, we present a decision feedback equalizer (DFE) that uses the quadrature components of 8-VSB signals in ATSC systems to mitigate multipath distortion efficiently. Unlike the conventional DFE structure for 8-VSB signals in which a real-valued feedback filter is used with real-valued decisions, the proposed DFE uses a complex-valued feedback filter with a complex-valued feedback sample generator. Due to the difficulty in analyzing a recursive system, we present a limited performance analysis on the proposed algorithm that a well-modeled feedback filter successfully cancels multipath channels with quadrature leakages in the absence of noise. For the performance comparison with conventional DFEs in realistic environments, we uses simulation methods.
ISSN:0018-9316
1557-9611
DOI:10.1109/TBC.2008.2001149