Bit and power allocation scheme for full-duplex transmission with echo cancellation in multicarrier-based modems
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United States of America Patent
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Mar 31, 2009
Grant Date -
Oct 28, 2004
app pub date -
Apr 23, 2003
filing date -
Apr 23, 2003
priority date (Note) -
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Abstract
The present invention provides a method, data modulator, modem, computer readable medium and system for allocating bits to sub-carriers of data channel frequencies for spectrally efficient full-duplex transmission. Bits are allocated successively to a plurality of sub-carriers for a data channel based on minimal power consumption, a power mask for each sub-carrier, a bit capacity of each sub-carrier, and a predetermined data rate. Allocation of bits is ceased when at least one of: a predetermined total power budget has been substantially exhausted, power masks for the plurality of sub-carriers have been substantially exhausted, bit capacities for the plurality of sub-carriers have been substantially exhausted, and the predetermined data rate has been reached.
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