Title :
A novel adaptive modulation scheme in FDD communications
Author_Institution :
Southeast Univ., Nanjing, China
Abstract :
In this paper structure and timing of adaptive modulation in FDD communications are analyzed over fading channels and a novel adaptive modulation scheme is proposed to get the tradeoff of system efficiency and complexity. Further, influence of multiplication of Doppler frequency and packet duration is analyzed on spectral efficiency. Simulation results show that this scheme can get maximum spectral efficiency for different multiplication value.
Keywords :
adaptive modulation; fading channels; frequency division multiplexing; time-varying channels; Doppler frequency; FDD communications; adaptive modulation scheme; fading channel; frequency division duplex; spectral efficiency; Downlink; Fading; Feedback; Laboratories; Mobile communication; OFDM modulation; Radio transmitters; Spectral analysis; Timing; Wireless communication;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2003. PIMRC 2003. 14th IEEE Proceedings on
Print_ISBN :
0-7803-7822-9
DOI :
10.1109/PIMRC.2003.1259096
