Multi-band DMT receiver
AssigneeBroadcom Corporation
InventorMiguel Philipe Paul Peeters
Life of this patent
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Abstract
There is disclosed a receiver for receiving a multi-band DMT signal. The receiver includes a plurality of demodulators, each demodulator having a discrete Fourier transform and being provided to demodulate a respective one of a plurality of bands in the multi-band signal, the multi-band signal being modulated in an inverse discrete Fourier transform. A method of demodulating a multi-band signal is also provided.
Claims20
A receiver for demodulating a multi-tone, multi-band signal modulated using an inverse discrete Fourier transform to generate a signal having a plurality of tones spaced in frequency in a plurality of frequency bands, comprising:
- a plurality of demodulators, wherein:
- each of the plurality of demodulators is configured to demodulate a data signal having a different one of the plurality of frequency bands of the multi-tone, multi-band signal, and is configured to utilize a different sampling rate,
- each demodulator includes a discrete Fourier transform module and at least two of the plurality of demodulators have different discrete Fourier transform sizes,
- each demodulator includes a time equalizer coupled to the input of the discrete Fourier transform module,
- at least one of the plurality of demodulators receives a downsampled data signal, and
- the plurality of demodulators are configured to perform demodulation in parallel.
A method of demodulating a multi-tone, multi-band signal modulated using an inverse discrete Fourier transform, comprising the steps of:
- dividing the multi-tone, multi-band signal into a plurality of data signals, each data signal having a plurality of tones in one of the plurality of frequency bands;
- and
- equalizing each of the plurality of data signals in the time domain;
- and
- demodulating, in parallel each of the plurality of equalized data signals in a separate demodulator using a discrete Fourier transform, wherein each demodulator utilizes a different sampling rate and wherein at least two demodulators use different size discrete Fourier transforms.
A receiver for demodulating a multi-tone, multi-band signal modulated using an inverse discrete Fourier transform to generate a signal having a plurality of tones spaced in frequency in a plurality of frequency bands, comprising:
- a plurality of demodulators, wherein:
- each of the plurality of demodulators is configured to demodulate a data signal having a different one of the plurality of frequency bands of the multi-tone, multi-band signal, and is configured to utilize a different sampling rate,
- each demodulator includes a discrete Fourier transform module and at least two of the plurality of demodulators have different discrete Fourier transform sizes,
- each demodulator includes a time equalizer coupled to the input of the discrete Fourier transform module,
- at least one of the plurality of demodulators receives a downsampled data signal, and
- the plurality of demodulators are configured to perform demodulation in parallel;
- and
- a splitter that divides the received multi-tone, multi-band signal into a plurality of data signals, each data signal having a plurality of tones in one of the plurality of frequency bands,
- wherein the splitter communicates each of the plurality of data signals to one of the plurality of demodulators that demodulates the frequency band of the data signal;
- and
- wherein the splitter further includes a plurality of filters, each filter coupled to one of the plurality of demodulators.
Dependencies are inferred from the claim text.