Iterative Turbo Channel Estimation for OFDM System over Rapid Dispersive Fading Channel
Date
2008
Authors
Zhao, Ming
Shi, Zhenning
Reed, Mark
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Volume Title
Publisher
Institute of Electrical and Electronics Engineers (IEEE Inc)
Abstract
Coherent OFDM detection requires accurate channel state information (CSI). Mobile radio channels are both time and frequency dispersive, especially at high vehicular speeds, which makes channel estimation a challenging problem in system design. Conventional preamble-based and pilot-aided channel estimation require numerous reference signals, which significantly compromises the system throughput. This paper proposes a novel low complexity iterative turbo channel estimation technique which makes use of preamble, pilots and soft decoded data information in an iterative fashion to improve the system performance over the time and frequency selective fading channel while maintaining the system throughput. The numerical and analytical results show that the proposed technique can approach the performance of systems with perfect CSI with much fewer preamble and pilots symbols compared to existing channel estimation methods.
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Keywords
Keywords: Analytical results; Challenging problem; Channel estimation methods; Data informations; Estimation techniques; Frequency-selective fading channels; Iterative fashion; Low-complexity; Mobile radio channels; OFDM; OFDM systems; Performance of systems; Pilot Channel estimation; OFDM; Rapid dispersive fading channel; Turbo iterative
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Source
IEEE Transactions on Wireless Communications
Type
Journal article
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2037-12-31
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