Title :
A sensitivity matched multicarrier modulation
Author_Institution :
Motorola Labs., Boynton Beach, FL, USA
Abstract :
We develop a multicarrier modulation scheme for transmission of compressed data. The energy allocation among subcarriers is optimized by minimizing a modified symbol error function in either AWGN or Rayleigh fading channels. It is observed that our sensitivity matched multicarrier modulation significantly outperforms the conventional multi carrier modulation. The performance gain in Rayleigh fading channels varies from 0.58 to 3.26 dB depending upon the relative sensitivity of bit groups associated with subchannels.
Keywords :
AWGN channels; Rayleigh channels; adaptive modulation; data communication; data compression; AWGN channels; MCQAM; QAM; Rayleigh fading channels; bit groups; compressed data transmission; modified symbol error function; multicarrier quadrature amplitude modulation; optimum transmission energy allocation; performance gain; sensitivity matched multicarrier modulation; static channels; subcarriers; subchannels; AWGN channels; Bit error rate; Delay; Error analysis; Fading; Modulation coding; OFDM modulation; Performance gain; Protection; Quadrature amplitude modulation;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/4234.975481
