Title :
Adaptive trellis coded MQAM and power optimization for OFDM transmission
Author :
Lai, Sai Kit ; Cheng, Roger S. ; Letaief, Khaled ; Murch, Ross D.
Author_Institution :
Center for Wireless Inf. Technol., Hong Kong Univ. of Sci. & Technol., Kowloon, Hong Kong
Abstract :
We propose an adaptive trellis coded modulation orthogonal frequency division multiplexing (ATCM-OFDM) scheme to provide high rate transmission with high spectral efficiency for an indoor environment. Our objective is to minimize the overall transmit power in each OFDM transmission by optimizing the power distribution, the code rate and modulation scheme in each OFDM subchannel so as to maintain a constant data transmission rate and a fixed bit error rate (BER). In the simulation, the ATCM-OFDM scheme can achieve more than 7 dB power reduction compared with the OFDM scheme using fixed TCM
Keywords :
OFDM modulation; adaptive codes; adaptive modulation; data communication; indoor radio; optimisation; quadrature amplitude modulation; trellis coded modulation; ATCM-OFDM scheme; BER; M-QAM; OFDM transmission; adaptive trellis coded modulation; constant data transmission rate; fixed bit error rate; high spectral efficiency; indoor environment; orthogonal frequency division multiplexing; overall transmit power minimisation; power optimization; Bit error rate; Data communication; Delay; Fading; Frequency conversion; Intersymbol interference; Mobile communication; Modulation coding; OFDM modulation; Power distribution;
Conference_Titel :
Vehicular Technology Conference, 1999 IEEE 49th
Conference_Location :
Houston, TX
Print_ISBN :
0-7803-5565-2
DOI :
10.1109/VETEC.1999.778063
