Patent ID: 7206350

Claim:
A receiver for receiving a combined OFDM signal that includes a plurality of sub-channel OFDM signals, the receiver including: a buffer and FFT for receiving the combined OFDM signal and performing an FFT thereon to output a frequency domain signal, each of the sub-channel OFDM signals occupying assigned frequency ranges within the frequency domain signal; a plurality of processing chains each associated with a sub-channel and each including: (i) a fast convolution filter and digital downconverter for extracting from the FFT of the combined OFDM signal the sub-channel OFDM signal occupying the assigned frequency range of the associated sub-channel and performing an IFFT on the extracted sub-channel OFDM signal; (ii) an OFDM demodulator for demodulating the sub-channel OFDM signal output from the fast convolution and digital downconvertor.