System and method for non-crystal-based communications

An apparatus for conducting communications over an electronic medium, the apparatus comprising:

• a processor;
• a non-crystal-based reference oscillator coupled to the processor;
• an electronic communication interface coupled to the processor;
• and
• a computer readable storage medium, coupled to the processor, the computer readable storage medium storing a predetermined pattern, the computer readable storage medium further comprising executable code that when executed by the processor implements a method for communicating over the electronic medium, wherein the method comprises
• determining an initial sub-band frequency width,
• dividing, based on an output of the non-crystal-based reference oscillator, a first frequency band of the electronic medium into a plurality of sub-bands, wherein each sub-band has a corresponding central frequency separated from a neighboring sub-band by the initial sub-band frequency width,
• performing a Fourier transform function on the plurality of sub-bands,
• analyzing an output of the Fourier transform to determine communication activity on one or more of the plurality of sub-bands,
• receiving a data packet, transmitted by a transmitter, the data packet including a training sequence at one of the plurality of sub-bands,
• determining a correlation between i) the received training sequence contained in the data packet and ii) the predetermined pattern stored in the computer readable storage medium,
• estimating a residual frequency error in response to the correlation, and
• calculating a total frequency error comprising i) the initial sub-band frequency width and ii) the residual frequency error.

A method for communicating over an electronic medium using a non-crystal-based reference oscillator, the method comprising:

• storing a predetermined pattern to a computer readable storage medium;
• determining an initial sub-band distance;
• dividing, based on an output of the non-crystal-based reference oscillator, a first frequency band of the electronic medium into a plurality of sub-bands, each sub-band having a corresponding central frequency separated from a neighboring sub-band by the initial sub-band distance;
• receiving a data packet, transmitted by a transmitter, the data packet including a training sequence at one of the plurality of sub-bands;
• determining a correlation between i) the training sequence and ii) the predetermined pattern stored in the computer readable storage medium;
• estimating a residual frequency error in response to the correlation;
• and
• calculating a total frequency error comprising i) the initial sub-band distance and ii) the residual frequency error.