Method of determining an end of a transmitted frame in a frame-based communications network

A method of determining an end of a transmitted frame at a receiver on a frame-based communications network comprising:

• providing an end of frame format for the transmitted frame having an and of frame plurality of symbols;
• linear matched filtering a received transmitted frame using filter coefficients matched to the end of frame plurality of symbols to provide a correlation sequence, the filter coefficients being a time-reversed complex-conjugated end of frame symbol sequence including complex symbols drawn from a Quadrature Phase Shift Keying or 4-Quadrature Amplitude Modulation constellation;
• computing a squared magnitude of the correlation sequence;
• low-pass filtering the squared magnitude of the correlation sequence to provide a low-pass filtered correlation signal;
• delaying the low-pass filtered correlation signal to provide a delayed low-pass filtered correlation signal;
• multiplying the delayed low-pass filtered correlation signal by a fixed predetermined threshold by first computing 10*log10(.), or an approximation of 10*log10(.), of each low-pass filtered correlation signal operand to provide a plurality of low-pass filtered correlation signal log operands and then adding each of the plurality of low-pass filtered correlation signal log operands to provide a multiplied correlation signal;
• and
• comparing the multiplied correlation signal with the low-pass filtered correlation signal to provide a match/no match comparison indicative of the possible end of a transmitted frame and performing a comparison a predetermined number of times before an end of a transmitted frame is determined.