Demodulator circuit and demodulating method employing bit error

Details Demodulator circuit and demodulating method employing bit error Demodulator circuit and demodulating method employing bit error

1994-01-12

1995-10-03

Pascal, Robert J.

Demodulators

Frequency modulation demodulator

Input signal combined with local oscillator or carrier...

329302, 329307, 329319, 329360, 371 51, 371 54, 371 471, 375344, H04L 2706, H04L 2722

Patent

active

054555361

ABSTRACT:
A demodulator circuit and a demodulating method are disclosed. A demodulator including a phase-locked loop for a receive carrier recovery or a phase lock recovery demodulates an input received signal and a band of a loop filter of the phase-locked loop is controlled by a control signal. A bit error rate monitor detects a bit error rate of a demodulated outputs the control signal on the basis of the bit error rate result of the demodulator, and a loop filter band controller output from the bit error rate monitor. Hence, the bit error rate of the demodulated signal is detected and the loop filter band of the phase-locked loop of the demodulator is controlled based on the detected bit error rate. As a result, an exact control of the loop filter band of the demodulator can be performed on the basis of the received signal state without using any received signal power detector, any C/N detector or the like.

REFERENCES:
patent: 4332029 (1982-05-01), Campbell et al.
patent: 4387461 (1983-06-01), Evans
patent: 4563651 (1986-01-01), Ohta et al.
patent: 4580101 (1986-04-01), Lax
patent: 4594556 (1986-06-01), Ohta
patent: 4680765 (1987-07-01), Donald
patent: 4940951 (1990-07-01), Sakamoto
patent: 5065107 (1991-11-01), Kumar et al.
patent: 5301197 (1994-04-01), Yamada et al.

Affiliated with

Also associated with

Rating

Demodulator circuit and demodulating method employing bit error does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Demodulator circuit and demodulating method employing bit error , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Demodulator circuit and demodulating method employing bit error will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1079777