Multicarrier receiver

A method of equalizing a multicarrier symbol in a multicamer receiver comprising:

• a) windowing the multicarrier symbol to decrease spectral side lobes of the multicarrier symbol;
• b) performing a single fast Fourier transform for all carriers of the windowed multicarrier symbol;
• and
• c) equalizing all frequencies using a sliding fast Fourier transform.

A computer program product compnsing a computer readable storage medium having a computer program encoded theron, the computer program comprising:

• a) program instructions for windowing the multicarrier symbol to decrease spectral side lobes of the multicarrier symbol;
• b) program instructions for performing a single fast Fourier transform for all carriers of the windowed multicarrier symbol;
• and
• c) program instructions for eciualizing all freciuencies using a sliding fast Fourier transform.

A multicarrier receiver which receives a cyclically extended multicarrier symbol which is in a serial format, said multicarrier receiver comprising:

• a serial to parallel converter which converts the multicarrier symbol into a parallel format and outputs the converted multicarrier symbol in parallel format;
• a window which is coupled to the serial to parallel converter and decreases spectral side lobes of the multicarrier symbol and outputs a windowed multicarrier symbol;
• a difference term generating unit which is coupled to the serial to parallel converter and generates difference terms from the multicarrier symbol in parallel format;
• a first Fourier transformer which is coupled to the window and fast Fourier transforms a single carrier of the windowed multicarrier symbol for all carriers of the windowed multicarrier symbol and outputs a first Fourier transformed carrier;
• a second Fourier transformer which is coupled to the difference term generating unit and fast Fourier transforms difference terms generated from the difference term generating unit;
• a per-carrier frequency domain equalizer which is coupled to the first and second Fourier transformers and comprises a tapped delay line for each carrier in the multicarrier symbol, wherein the per-carrier frequency domain equalizer equalizes all frequencies by deriving necessary fast Fourier transforms utilizing linear combinations of the first fast Fourier transformed carrier, one or more non-windowed fast Fourier transformed carriers from the second Fourier transformer and the difference terms;
• a demapper which decodes an exact amount of bits from the tapped delay line for each carrier in the per-carrier frequency domain equalizer;
• a parallel to serial converter which converts the multicarrier symbol in parallel format output from the demapper into a serial format, and outputs the converted multicarrier symbol in serial format.

A method of equalizing a multicarrier symbol in a multicarrier receiver comprising:

• converting the multicarrier symbol in a serial format to parallel format;
• windowing the converted multicarrier symbol to decrease spectral side lobes of the multicarrier symbol and output windowed carriers;
• generating difference terms from the converted multicarrier symbol;
• first fast Fourier transforming a single carrier of the windowed carriers;
• second fast Fourier transforming the difference terms;
• equalizing all frequencies by deriving necessary fast Fourier transforms utilizing linear combinations of the first fast Fourier transforming a single carrier of the windowed carriers, the second fast Fourier transforming the difference terms and difference terms;
• demapping to decode an exact amount of bits from equalizing all frequencies;
• converting the multicarrier symbol in a parallel format to serial format.