Title :
A study of different decoders for the new rotation spreading matrix for block spread OFDM in UWB channels
Author :
Raad, Ibrahim S. ; Huang, Xiaojing ; Lowe, Darryn
Author_Institution :
Univ. of Wollongong, Wollongong
Abstract :
This paper presents a study into different decoders for the new Rotation Spreading Matrix proposed for Block Spread OFDM (BSOFDM). It presents simulation results for the Maximum Likelihood (ML), Minimum Mean Square Error (MMSE), Zero Forcing (ZF), Maximal Ratio Combining (MRC) and Equal Gain Combining (EGC) decoders across the four IEEE defined Ultra-Wideband (UWB) channels CM1 to CM4. While it is well known that the ML decoder should theoretically outperform all the other decoders, practically due to its complexity it is not a viable option. It can be shown that MMSE, for BSOFDM with the proposed new Rotation Spreading Matrix, has a good performance at low SNR and has been proven to be a practical solution in wireless communications systems due to its simplicity and performance.
Keywords :
OFDM modulation; least mean squares methods; matrix algebra; maximum likelihood decoding; ultra wideband communication; wireless channels; UWB channel; block spread OFDM; equal gain combining decoder; maximal ratio combining decoder; maximum likelihood decoder; minimum mean square error; new rotation spreading matrix; orthogonal frequency division multiplexing; ultra-wideband channel; zero forcing decoder; Australia; Computational modeling; Diversity reception; Error correction; Error correction codes; Maximum likelihood decoding; Mean square error methods; OFDM modulation; Telecommunication computing; Ultra wideband technology; BSOFDM; Block Spread-OFDM; ML; MMSE; UWB; ZF;
Conference_Titel :
Telecommunications and Malaysia International Conference on Communications, 2007. ICT-MICC 2007. IEEE International Conference on
Conference_Location :
Penang
Print_ISBN :
978-1-4244-1094-1
Electronic_ISBN :
978-1-4244-1094-1
DOI :
10.1109/ICTMICC.2007.4448664
