Circuit for reproducing bit timing and method of reproducing...

Details Circuit for reproducing bit timing and method of reproducing... Circuit for reproducing bit timing and method of reproducing...

H - Electricity

04

L

H04L 7/027 (2006.01) H04L 7/02 (2006.01) H04L 27/22 (2006.01) H04L 27/233 (2006.01) H04L 7/04 (2006.01)

Patent

CA 2256169

There is provided a circuit for reproducing bit timing, including (a) a first analog-digital converter for converting a real part signal of a complex modulation signal into a real part digital signal, the complex modulation signalhaving a base band frequency band and obtained from a received modulation signal modulated into a digital phase, (b) a second analog-digital converter forconverting an imaginary part signal of the complex modulation signal into an imaginary part digital signal, (c) a first detector for receiving the real part digital signal and the imaginary part digital signal, detecting a phase angle of the complex modulation signal on a complex plane, and transmitting a first signal indicative of the phase angle, (d) a delay circuit for delaying the first signal by a symbol interval, (e) a second detector for detecting a difference in phase on the complex plane between the complex modulation signals in the symbol interval, (f)a third detector for detecting a timing gap between a sampling clock and an optimum sampling point, based on the difference in phase, detected by the seconddetector, and transmitting a second signal indicative of the timing gap, and (g) a signal converter for converting each of the real part digital signal and the imaginary part digital signal into a signal associated with the optimum samplingpoint, based on the second signal. The circuit is hardly influenced by noises and non-linear strains, and is capable of reducing power consumption and accomplishing maintenance free.

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