Pilot Assisted Channel Estimation in Differential Space Time OFDM

Name: Pilot Assisted Channel Estimation in Differential Space Time OFDM
Brand: LAP Lambert Academic Publishing
SKU: 9783838329000
Price: 235.66 RON
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Problem Formulation and Performance Evaluation

Autor: Mansour Tahernezhadi

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Editura: LAP Lambert Academic Publishing

Disponibilitate: În depozitul extern

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Orthogonal frequency division multiplexing (OFDM) is a multi-carrier transmission technique in which...

Informații despre carte

Autor

Mansour Tahernezhadi

Limbă

engleză

Legare

Carte - Carte broșată

Publicat

2009

Pagini

EAN

9783838329000

Enbook ID

07115887

Editura

LAP Lambert Academic Publishing

Greutate

153

Dimensiuni

150 x 220 x 5

Descriere completă

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.

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Pilot Assisted Channel Estimation in Differential Space Time OFDM

Problem Formulation and Performance Evaluation

Informații despre carte

Descriere completă

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