Title :
Transmitting UWB-OFDM Using 16-QAM over Hybrid Flat Fading Channels
Author :
Chaudhry, S.R. ; Al-Raweshidy, H.S. ; Rahman, Abdul
Author_Institution :
Electron. & Comput. Eng. Div., Brunel Univ., London, UK
Abstract :
This paper derives a simulation based comparison for UWB-OFDM with different multipath channel models. Several multipath channel models such as (AWGN, Rayleigh and Rician) has been simulated and compared with a proposed hybrid combination of Rayleigh, Rician and AWGN to observe a realistic multipath faded environment. These cases are based on no fading and flat Rayleigh- fading, multiple-diversity reception Rayleigh-fading, and flat Ricean-fading. These simulations are used to determine both signal to noise ratio and bit error rate for multi-amplitude constellations. The combination of Rayleigh and AWGN channels give BER and SNR of 0.5025 and 15.25dB respectively in flat fading mode, whereas combination of Rician and AWGN produces BER and SNR upto 0.4999 and 16.63dB. The proposed Hybrid combination of Rayleigh, Rician and AWGN produces a decay in BER and SNR approximately 2% and 3.5% respectively.
Keywords :
AWGN channels; OFDM modulation; Rayleigh channels; Rician channels; diversity reception; error statistics; multipath channels; quadrature amplitude modulation; ultra wideband communication; 16-QAM; AWGN channel; BER; SNR; UWB-OFDM transmission; bit error rate; flat Rayleigh-fading channel; flat Ricean-fading channel; hybrid flat fading channels; multiamplitude constellations; multipath channel models; multiple-diversity reception Rayleigh-fading channel; signal to noise ratio; AWGN; AWGN channels; Multipath channels; OFDM; Rayleigh channels; Rician channels;
Conference_Titel :
Vehicular Technology Conference (VTC Spring), 2011 IEEE 73rd
Conference_Location :
Yokohama
Print_ISBN :
978-1-4244-8332-7
DOI :
10.1109/VETECS.2011.5956771
