Abstract
The influence of residual carrier frequency offset on demodulation for multi-tone parallel signals is theoretically deduced and simulated, and two compensation algorithms for residual carrier frequency offset are proposed. Taking 16 tones for example, the simulation results in AWGN channel show that the influence of the residual carrier frequency offset is in agreement with the theoretical derivation, and the loss of error code performance is less than 0.1db when the frequency offset is less than 0.4% of the sub-carrier symbol rate. The thresholds of the SNR lossing less than 0.1db are obtained: Eb/N0=5db for short burst signals and Eb/N0=4db for continuous signals. The theoretical analysises and simulation results show that the proposed algorithms are applicable to multi-tone parallel signals.
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