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Pilot Assisted Channel Estimation in Differential Space Time OFDM


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  • Product Description

Orthogonal frequency division multiplexing (OFDM) is a multi-carrier transmission technique in which data from a single high data rate stream is transmitted over multiple sub-carriers at low data rate. Space-time block coding, applied to OFDM results in performance improvement to frequency selective fading. In time-varying environment, OFDM experiences inter-carrier interference (ICI) due to the Doppler spread of the channel. In this work, we propose a technique where pilot-assisted channel estimation is combined with differential ST-OFDM for reducing the performance degradation caused by ICI. A Rayleigh fading channel is considered, and channel estimation is performed using the method of modified local splines. The system is simulated and the performance has been observed for various Doppler conditions. The results show that the proposed system has improved performance over the differential ST-OFDM at high Doppler but has a 3dB decrease in performance compared to the coherent ST-OFDM.

Product Specifications
SKU :COC32130
AuthorMansour Tahernezhadi and Veena Bhyrapuram
Number of Pages92
Publishing Year9/14/2010
Edition1 st
Book TypeElectronics & communications engineering
Country of ManufactureIndia
Product BrandLAP LAMBERT Academic Publishing
Product Packaging InfoBox
In The Box1 Piece
Product First Available On ClickOnCare.com2015-07-29 00:00:00
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