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A novel robust bit loading algorithm with uniform power constraint under desired rate for OFDM is proposed. In this algorithm, only strong subchannels are used to transmit data .The number of active subchannels is determined by a criterion named capacity criterion, then power is allocated among active subchannels. The most significant novelties of this algorithm are that two modulation schemes are...
Based on the concept of optimal signal subspace, signal spectrum transformation is carried out according to channel state information before transmission, and system performance can be improved considerably. In this paper, we propose an adaptive modulation algorithm that guarantees a desired bit error rate with uniform power allocation, and the algorithm has low complexity and high spectrum efficiency...
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