Patent ID: 8842759

Claim:
A method for use in a receiver comprising: receiving orthogonal frequency division multiplexing (OFDM) symbols, each OFDM symbol having N time domain samples, where N is an integer, one time domain sample of which is a complex value time domain sample comprising two time domain samples, one of which is a real component of the complex value time domain sample and one of which is an imaginary component of the complex value time domain sample; and for each OFDM symbol: separating the real and imaginary components of the complex value time domain sample into two real time domain samples such that the OFDM symbol now has a total of N+1 time domain samples; expanding the N+1 time domain samples into 2N time domain samples based on applying conjugate symmetry to N−1 of the N+1 time domain samples; performing a 2N-point Fast Fourier Transform (FFT) on the 2N time domain samples to yield a sequence a m (k), k=0, 1, 2, . . . , 2N−1, resulting in 2N M-ary amplitude-shift keying (M-ASK) symbols per OFDM symbol; and de-mapping each M-ASK symbol of the 2N M-ASK symbols into a sequence of N b =(2N) log 2 M bits, where M is the number of signals in an M-ASK signal set.