Patent ID: 8908799

Claim:
A transmitter comprising: a parameter adaptor that selects a UASK or UQAM constellation to be used by the transmitter by selecting one of a plurality of different UASK or UQAM constellations by taking into account a target BER performance for different bit positions of input bits; and a UASK (amplitude shift keying with uneven distance) modulator or UQAM (quadrature amplitude modulation with uneven distance) modulator that generates a sequence of UASK or UQAM symbols from the input bits by mapping a respective subset of the input bits to the selected UASK constellation or UQAM constellation without using superposition to produce a respective UASK or UQAM symbol; wherein the transmitter is configured to transmit a signal containing the sequence of UASK or UQAM symbols during non-overlapping time intervals.