Local oscillation signal supply method and circuit therefor

Details Local oscillation signal supply method and circuit therefor Local oscillation signal supply method and circuit therefor

2007-03-06

2007-03-06

Fan, Chieh M. (Department: 2611)

Pulse or digital communications

Receivers

C375S134000, C342S371000, C342S372000, C342S382000, C455S182100

Reexamination Certificate

active

10088689

ABSTRACT:
With the object of accurately reproducing, by means of a small-scale circuit, differences in propagation delay at antennas of received signals that are received as input by way of each of a plurality of receivers, frequency data generator6supplies frequency data that contain a frequency component that is synchronized in common to the plurality of receivers2-1to2-n. At receiver2-n, local oscillation signal generator3-n, which is represented by a D/A converter, generates a local oscillation signal from frequency data that have been synchronized in common. The passing phase of a received signal that is outputted from antenna1-n by way of receiver1-n is thus fixed, and as a result, the phase difference of received signals that are received by DSP8by way of the plurality of receivers2-1to2-n becomes the propagation delay difference of the received signals. As frequency data, frequency data that contain a plurality of frequency components are supplied to each receiver2-n, and the frequency data are selected inside receiver2-n and subjected to quadrature modulation to enable generation of local oscillation signals of differing intermediate frequencies.

REFERENCES:
patent: 5061937 (1991-10-01), Ozeki et al.
patent: 5428308 (1995-06-01), Maeda
patent: 5535441 (1996-07-01), Jackson et al.
patent: 5585803 (1996-12-01), Miura et al.
patent: 5620608 (1997-04-01), Rosa et al.
patent: 5715275 (1998-02-01), Emi
patent: 0 623 357 (1994-11-01), None
patent: 60-148237 (1985-08-01), None
patent: 01-279639 (1989-11-01), None
patent: 02-065421 (1990-03-01), None
patent: 02-193088 (1990-07-01), None
patent: 03-220803 (1991-09-01), None
patent: 04-088729 (1992-03-01), None
patent: 09-130361 (1997-05-01), None
patent: 2000-295169 (2000-10-01), None
patent: WO98/35747 (1998-08-01), None

Affiliated with

Also associated with

Rating

Local oscillation signal supply method and circuit therefor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Local oscillation signal supply method and circuit therefor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Local oscillation signal supply method and circuit therefor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3796833