Könyv Pilot Assisted Channel Estimation in Differential Space Time OFDM Mansour Tahernezhadi

Pilot Assisted Channel Estimation in Differential Space Time OFDM

Problem Formulation and Performance Evaluation

Nyelv: Angol
Kötés: Puha kötésű
Elérhetőség: Beszállítói készleten
Küldés 5-8 napon belül
16 393 Ft
Orthogonal frequency division multiplexing (OFDM) is a multi-carrier transmission technique in which...

Információk a könyvről

Nyelv
Angol
Kötés
Könyv - Puha kötésű
Kiadva
2009
oldal
92
EAN
9783838329000
Enbook ID
07115887
Súly
153
Méretek
150 x 220 x 5

Teljes leírás

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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