Title :
The performance of high order modulation QAM-OFDM in the presence mutipath fading channels
Author :
Riche, Larry, II ; Sujaee, Khalil ; George, Roy
Author_Institution :
Dept. of Comput. & Inf. Sci., Clark Atlanta Univ., Atlanta, GA, USA
Abstract :
The limited amount frequency spectrum available to wireless communication systems makes it difficult to satisfy the rapidly growing demand for wireless service. Spectral efficiency can be increased by using higher order modulation schemes. However this come at the cost of increased probability of error. In this paper we investigate through MATLAB simulation, the implementation of orders of Quadrature Amplitude Modulation (QAM) more commonly used in wired networks. The BER performance of 256, 512, 1024, 2048, and 4096 QAM-Orthogonal Frequency Division Multiplexing(OFDM) signals in the presence of Rayleigh and Rician multipath channels with additive white Gaussian noise are simulated.
Keywords :
AWGN channels; OFDM modulation; Rayleigh channels; Rician channels; error statistics; multipath channels; quadrature amplitude modulation; radiocommunication; 1024 QAM; 2048 QAM; 256 QAM; 4096 QAM; 512 QAM; AWGN; BER performance; MATLAB simulation; Rayleigh channels; Rician channels; additive white Gaussian noise; frequency spectrum; high order modulation QAM-OFDM; multipath fading channels; orthogonal frequency division multiplexing signals; probability of error; quadrature amplitude modulation; spectral efficiency; wired networks; wireless communication systems; wireless service; Bit error rate; OFDM; Quadrature amplitude modulation; Rician channels; Throughput; Wireless communication;
Conference_Titel :
Southeastcon, 2012 Proceedings of IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
978-1-4673-1374-2
DOI :
10.1109/SECon.2012.6196936
