Carrier tracking techniques in communications systems are disclosed. The method involves allocating a first number of bits per symbol to a carrier tracking subcarrier of a plurality of subcarriers of an orthogonal frequency division multiplexing (OFDM) signal based on a first target performance margin, and allocating numbers of bits per symbol to other subcarriers of the plurality of subcarriers based on a second target performance margin. The apparatus comprises a select module configured to select a carrier tracking subcarrier from a plurality of subcarriers of an orthogonal frequency division multiplexing (OFDM) signal based on performance estimates for the plurality of subcarriers, and a bit allocation module configured to allocate a number of bits per symbol to the carrier tracking subcarrier frequency based on a first target performance margin and configured to allocate numbers of bits per symbol to other subcarriers of the plurality of subcarriers based on a second target performance margin.
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