Title :
Exploiting Time Diversity to Improve Block Spread OFDM in a Multipath Environment
Author :
Raad, Ibrahim S. ; Huang, Xiaojing
Author_Institution :
Sch. of Electr., Comput. & Telecommun. Eng., Wollongong Univ., NSW
Abstract :
This paper presents a new method to improve on block spread OFDM by exploiting time diversity to ensure that the blocks are independent and uncorrelated in a multipath environment. While BSOFDM utilizes frequency diversity to significantly improve on OFDM in frequency selective channel, this did not improve during flat fading channel which does occur during transmission. Our work has also shown that this improvement is also true in multipath transmission. By exploiting time and frequency diversity, BSOFDM is improved significantly over conventional BSOFDM and conventional OFDM
Keywords :
OFDM modulation; diversity reception; fading channels; multipath channels; block spread OFDM; flat fading channel; frequency diversity; frequency selective channel; multipath environment; multipath transmission; spreading matrices; time diversity; Australia; Delay; Fading; Frequency diversity; Frequency modulation; Interleaved codes; OFDM modulation; Rayleigh channels; Telecommunication computing; Transmitters; Block Spread-OFDM; OFDM; Spreading Matrices; Time Diversity;
Conference_Titel :
Information and Communication Technologies, 2006. ICTTA '06. 2nd
Conference_Location :
Damascus
Print_ISBN :
0-7803-9521-2
DOI :
10.1109/ICTTA.2006.1684790
