Method and circuit for detecting burst signal

Details Method and circuit for detecting burst signal Method and circuit for detecting burst signal

1992-10-16

1995-10-10

Chin, Stephen

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

375324, H04L 2706

Patent

active

054577101

ABSTRACT:
A phase angle .theta. of a received signal is calculated according to a formula .theta.=tan.sup.-1 (Q/I), where I and Q are magnitudes of baseband signals obtained by quadrature detection of the received signal. An angular velocity .DELTA..theta. of the phase angle .theta. is also calculated. A variance parameter .SIGMA..sigma..sup.2 is calculated from a deviation .sigma.=.DELTA..theta.-.DELTA..theta., where .DELTA..theta. is a moving average of the .DELTA..theta.. The variance parameter .SIGMA..sigma..sup.2 thus calculated, is compared with a reference value to determine if a burst signal exists. Since the determination is performed essentially based on a phase of the received signal and not on an amplitude of the received signal, fluctuation of the amplitude of the received signal does not affect the decision.

REFERENCES:
patent: 4466108 (1984-08-01), Rhodes
patent: 4485448 (1984-11-01), Kurth
patent: 4603300 (1986-07-01), Welles, II et al.
patent: 4799025 (1989-01-01), Le Queau
patent: 5023940 (1991-06-01), Johnson et al.
patent: 5170415 (1992-12-01), Yoshida et al.
patent: 5289391 (1994-02-01), Ibrahim et al.

Affiliated with

Also associated with

Rating

Method and circuit for detecting burst signal does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and circuit for detecting burst signal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and circuit for detecting burst signal will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2315607