Title :
Performance of Adaptive MQAM with Space-Time Coding over Nakagami Fading Channel
Author :
Yu, Xiangbin ; Zhou, TingTing ; Li, YanFeng
Author_Institution :
Coll. of Inf. Sci. & Technol., Nanjing Univ. of Aeronaut. & Astronaut., Nanjing, China
Abstract :
The performance analysis of multiple antenna systems with adaptive MQAM and space-time coding over flat Nakagami-m fading channels is presented in this paper. The fading gain value is partitioned into a number of regions by which the modulation is adapted according to the region the fading gain falls in. The fading gain region boundaries for attaining maximum spectrum efficiency subject to the target bit error rate (BER) and fixed power constraint are derived. The probability density function of fading gain is given. Based on these results and mathematical calculation, an exact closed-form expression for the SE is obtained. Meanwhile, exact BER and tightly approximate closed-form BER expressions are derived for integer and non-integer m, respectively. Simulation results for SE and BER are in good agreement with the theoretical analysis.
Keywords :
Nakagami channels; antenna arrays; error statistics; probability; quadrature amplitude modulation; space-time codes; BER; Nakagami-m fading channels; adaptive MQAM; attaining maximum spectrum efficiency; bit error rate; fading gain region boundaries; fading gain value; fixed power constraint; multiple antenna systems; probability density function; space-time coding; Bit error rate; Encoding; Fading; Modulation; Receiving antennas; Simulation; Transmitting antennas; Adaptive MQAM; Nakagami fading channel; bit error rate; constant power; space-time coding;
Conference_Titel :
Communications and Intelligence Information Security (ICCIIS), 2010 International Conference on
Conference_Location :
Nanning
Print_ISBN :
978-1-4244-8649-6
Electronic_ISBN :
978-0-7695-4260-7
DOI :
10.1109/ICCIIS.2010.40
