Method and apparatus for decoding baseband orthogonal frequency division multiplex signals

An apparatus for decoding baseband orthogonal frequency division multiplex (OFDM) signal, the apparatus comprises:

• processing module;
• and
• memory operably coupled to the processing module, wherein the memory includes operational instructions that cause the processing module to:
• slice each sub-carrier signal of the OFDM signal into a plurality of error terms, wherein a number of the plurality of error terms corresponds to a constellation size of the sub-carrier signal;
• group individual error terms of the plurality of error terms for the each sub-carrier signal to produce a plurality of error term groups;
• deinterleave each of the plurality of error term groups to produce a corresponding plurality of deinterleaved error term groups;
• and
• interpret the plurality of deinterleaved error term groups to produce a plurality of data values, wherein each of the plurality of data values relates to information contained in a corresponding one of a plurality of deinterleaved sub-carrier signals of the OFDM signal.

A radio receiver comprises:

• low noise amplifier operably coupled to amplify a orthogonal frequency division multiplex (OFDM) signal to produce an amplified OFDM signal;
• mixing module operably coupled to mix the amplified OFDM signal with a local oscillation to produce a baseband signal;
• analog to digital conversion module operably coupled to convert the baseband signal into a digital baseband signal;
• fast Fourier transform module operably coupled to convert the digital baseband signal into a plurality of bins of I components and Q components;
• frequency equalizing module operably coupled to equal frequency response of the plurality of bins of I components and Q components to produce a plurality of bins of equalized I components and equalized Q components;
• plurality of soft slicing modules operably coupled to produce a plurality of error term groups from the plurality of bins of equalized I components and equalized Q components, wherein each of the plurality of error term groups is produced from a corresponding one of the plurality of bins of the equalized I components and equalized Q components;
• deinterleaving module operably coupled to deinterleave the plurality of error term groups to produce a plurality of deinterleaved error term groups;
• and
• decoding module operably coupled to decode the plurality of deinterleaved error term groups to produce a plurality of data values.