Title :
A power and bit allocation algorithm of changeable BER for MIMO OFDM system
Author :
Kong, Jie ; Lu, Zhensu ; Li, Haiyan
Author_Institution :
Inf. Sci. & Eng., Lanzhou Univ., China
Abstract :
A novel power and bit allocation algorithm for MIMO OFDM system with changeable BER is proposed. This algorithm is based on the waterfilling theorem and calculates the approximate upper bound of the BER in each subchannel, and then the bit and power can be allocated according to the variable BER. This approach maximizes the frequency efficiency under the average power constraint. The theoretic analysis and simulation results show that the frequency efficiency is greater than the algorithm with the fixed BER.
Keywords :
MIMO systems; OFDM modulation; error statistics; telecommunication channels; MIMO OFDM system; bit allocation algorithm; changeable BER; power allocation algorithm; waterfilling theorem; Bit error rate; Bit rate; Delay effects; MIMO; Matrix decomposition; OFDM modulation; Receiving antennas; Transmitters; Transmitting antennas; Upper bound; Adaptive modulation; BER; MIMO OFDM; the Average power constraint; waterfilling algorithm;
Conference_Titel :
Intelligent Signal Processing and Communication Systems, 2005. ISPACS 2005. Proceedings of 2005 International Symposium on
Print_ISBN :
0-7803-9266-3
DOI :
10.1109/ISPACS.2005.1595360
