Method and apparatus for modifying a decision-directed clock recovery system

Abstract From the Canadian patent

The present disclosure includes a discussion of a decision-directed clock recovery system which includes circuitry to prevent false-locking and accelerate acquisition on a known symbol patterns. The clock recovery system has at least two control circuits. Each control circuit has an effective bandwidth and also generates a clock signal. The clock recovery system samples the received data signal using at least two clock signals (573, 575), forming a corresponding first and second sampled signal. The sampled signals are used to generate corresponding symbol decisions (581 583). The symbol decision signals are processed to detect a known symbol pattern in the received data signal (513). Upon …