Title :
Improved Chow Algorithm Used in Adaptive OFDM System
Author :
Yu Qing ; Wang Yi
Author_Institution :
Sch. of Inf. Sci. & Eng., Southeast Univ., Nanjing, China
Abstract :
In adaptive OFDM system, Chow algorithm is the most widely-used method to improve system performance. However, Chow algorithm which based on channel capacity is not the optimal method. In this paper, the optimal bit allocation method of multi-tone system: Campello allocation method is introduced. After simplify Classic Chow algorithm, we combined Chow algorithm and Campello method, then produced improved Chow algorithm, which is proved effective by simulation. Then we used improved Chow algorithm in both SISO OFDM system and MIMO OFDM system.
Keywords :
MIMO communication; OFDM modulation; adaptive modulation; channel capacity; Campello allocation method; Chow algorithm; MIMO OFDM system; SISO OFDM system; adaptive OFDM system; channel capacity; multi-tone system; optimal bit allocation method; Adaptive systems; Bit rate; Channel capacity; Constellation diagram; Frequency division multiplexing; MIMO; Mobile communication; Mobile computing; OFDM modulation; Transmitters; Campello SISO MIMO; Chow Algorithm; OFDM Adaptive;
Conference_Titel :
Communications and Mobile Computing (CMC), 2010 International Conference on
Conference_Location :
Shenzhen
Print_ISBN :
978-1-4244-6327-5
Electronic_ISBN :
978-1-4244-6328-2
DOI :
10.1109/CMC.2010.212
