Minimum BER Block-Based Precoder Design for Zero-Forcing Equalization: An Oblique Projection Framework

This work devises a minimum bit error rate (BER) block-based precoder used in block transmission systems with the proposed cascaded zero-forcing (ZF) equalizer. The study framework is developed as follows. For a block-based precoder, a received signal model is formulated for the two redundancy schem...

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Vydané v:IEEE transactions on signal processing Ročník 55; číslo 12; s. 5630 - 5642
Hlavní autori: WU, Chun-Hsien, CHERN, Shiunn-Jang
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: New York, NY IEEE 01.12.2007
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Predmet:
Applied sciences
Bit error rate
Block transmission systems
Blocking
cascaded equalizer
Channel state information
Derivation
Design engineering
Detection, estimation, filtering, equalization, prediction
Equalization
Equalizers
Exact sciences and technology
Filter bank
Finite impulse response filter
Information, signal and communications theory
inter-block interference (IBI)
inter-symbol interference (ISI)
Interference
Interference elimination
Intersymbol interference
oblique projection
OFDM modulation
precoder
Projection
Redundancy
Signal and communications theory
Signal, noise
Telecommunications and information theory
Transceivers
zero-forcing (ZF)
inter-block interference (IBI)
cascaded equalizer
zero-forcing (ZF)
oblique projection
channel state information
precoder
Block transmission systems
inter-symbol interference (ISI)
Performance evaluation
Parameter estimation
Redundancy
Bit error rate
Transmitter
Equalizer
Equalization
Implementation
Optimization
Block design
Simulation
Intersymbol interference
Channel estimation
Cascade connection
ISSN:1053-587X, 1941-0476
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Shrnutí:This work devises a minimum bit error rate (BER) block-based precoder used in block transmission systems with the proposed cascaded zero-forcing (ZF) equalizer. The study framework is developed as follows. For a block-based precoder, a received signal model is formulated for the two redundancy schemes, viz., trailing-zeros (TZ) and cyclic-prefix (CP). By exploiting the property of oblique projection, a cascaded equalizer for block transmission systems is proposed and implemented with a scheme, in which the inter-block interference (IBI) is completely eliminated by the oblique projection and followed by a matrix degree-of-freedom for inter-symbol interference (ISI) equalization. With the available channel state information at the transmitter side, the matrix for ISI equalization of the cascaded equalizer is utilized to design an optimum block-based precoder, such that the BER is minimized, subject to the ISI-free and the transmission power constraints. Accordingly, the cascaded equalizer with the ISI-free constraint yields a cascaded ZF equalizer. Theoretical derivations and simulation results confirm that the proposed framework not only retains identical BER performance to previous works for cases with sufficient redundancy, but also allows their results to be extended to the cases of insufficient redundancy.
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ISSN:1053-587X
1941-0476
DOI:10.1109/TSP.2007.900159