Title :
Performance of Hybrid MQAM-LFSK (HQFM) OFDM Transceiver in Rayleigh Fading Channels
Author :
Latif, Asma ; Gohar, Nasir D.
Author_Institution :
Fac. of Electron. Eng., GIK Inst. of Eng. Sci. & Technol., Swabi
Abstract :
In this contribution we propose a hybrid MQAM/LFSK modulation (HQFM) scheme and showed its performance over Rayleigh fading channels using different modulation formats and Doppler spread. The simulation invokes a PN sequence training based decision feedback equalizer. The performance of the proposed scheme was compared with conventional 256QAM-OFDM when communicating over channels exhibiting multi-path components. It was shown that the scheme advocated outperforms conventional system.
Keywords :
OFDM modulation; Rayleigh channels; decision feedback equalisers; multipath channels; transceivers; HQFM scheme; PN sequence training; Rayleigh fading channels; decision feedback equalizer; hybrid MQAM-LFSK OFDM transceiver; hybrid MQAM/LFSK modulation; intercarrier interference; intersymbol interference; Degradation; Fading; Frequency shift keying; Intersymbol interference; OFDM modulation; Peak to average power ratio; Quadrature amplitude modulation; RF signals; Transceivers; Wireless LAN; CP: Cyclic Prefix; Division Multiplexing; HQFM: Hybrid; ICI: Intercarrier Interference; ISI: Intersymbol Interference; MQAM/LFSK Modulator; OFDM: Orthogonal Frequency;
Conference_Titel :
Multitopic Conference, 2006. INMIC '06. IEEE
Conference_Location :
Islamabad
Print_ISBN :
1-4244-0795-8
Electronic_ISBN :
1-4244-0795-8
DOI :
10.1109/INMIC.2006.358135
