Methods and apparatus for frame detection

摘要

One embodiment relates to a frame detection circuit for detecting a frame boundary. The circuit includes at least two frame buffers and a staged-parallel structure of syndrome computation circuits that computes a number of syndromes in one cycle. The two frame buffers are each one word in width. The number of syndromes computed in one cycle by the cascaded series is a fraction of a number of bits in one word. Another embodiment relates to a method for detecting a frame boundary. Another embodiment relates to a method for computing a current syndrome. Other embodiments, aspects, and features are also disclosed.

主权项

1. A frame detection circuit for detecting a frame boundary in a sequence of bits, the circuit comprising:
a first buffer for storing a first received frame of bits, wherein a width of the first buffer is a number of bits in one word in the sequence of bits; a second buffer for storing a second received frame of bits, wherein a width of the second buffer is the number of bits in the one word; and a staged-parallel structure of syndrome computation circuits that computes a number of syndromes in one cycle, wherein the number of the syndromes computed in one cycle is a fraction of the number of bits in the one word, and wherein each syndrome computation circuit in the staged-parallel structure has inputs consisting of a preceding syndrome, a head bit from the first received frame and a tail bit from the second received frame.