Title :
Variable-rate variable-power hybrid M-FSK M-QAM for fading channels
Author :
Digham, Fadel F. ; Alouini, Mohamed-Slim
Author_Institution :
Dept. of Electr. & Comput. Eng., Minnesota Univ., Minneapolis, MN, USA
Abstract :
This paper investigates a variable-rate variable-power hybrid non-coherent M-FSK M-QAM system. The goal is to combine the spectral efficiency merit of M-QAM with the power efficiency advantage of M-FSK and as such extend the region of availability even at very low channel gain values. A basic system is first designed to maximize the average spectral efficiency while meeting average power and target bit error rate constraints. In addition, a peak power constraint is imposed in a more general system. The optimization procedure leads to optimum rate and power loading functions which are compared for the different modes of operation.
Keywords :
error statistics; fading channels; frequency shift keying; optimisation; quadrature amplitude modulation; telecommunication network reliability; BER; M-ary frequency shift keying; M-ary quadrature amplitude modulation; availability region; bit error rate constraint; fading channels; optimization procedure; peak power constraint; power loading functions; variable-rate variable-power hybrid noncoherent M-FSK M-QAM system; Availability; Bit error rate; Fading; Frequency shift keying; Intelligent transportation systems; Power measurement; Power system modeling; Power transmission; Quadrature amplitude modulation; Transmitters;
Conference_Titel :
Vehicular Technology Conference, 2003. VTC 2003-Fall. 2003 IEEE 58th
Print_ISBN :
0-7803-7954-3
DOI :
10.1109/VETECF.2003.1285277
