Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array
Reexamination Certificate
2006-12-05
2006-12-05
Issing, Gregory C. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a steerable array
C342S372000
Reexamination Certificate
active
07145508
ABSTRACT:
The disclosed radio frequency signal transmitting and receiving apparatuses compensate for phase and amplitude differences without detecting sync timing of a calibration signal.The radio frequency signal receiving apparatus consists of two or more antennas, radio frequency signal receiving units each being connected to an antenna, a calibration signal generating unit that generates the calibration signal having a cycle different from the cycle of a spread code, a radio frequency signal transmitting unit that converts the calibration signal into a radio frequency signal, directional couplers that add a radio frequency signal received by the respective antennas and the calibration signal in the radio frequency, a delaying unit that delays a baseband signal from the first radio frequency signal receiving unit, a correlation detecting unit that detects correlation between the output of the delaying unit and the baseband signal from the second radio frequency signal receiving unit, a weight generating unit, and a complex multiplier that compensates for the phase and gain differences due to the radio frequency signal receiving units based on the output of the correlation detecting unit.
REFERENCES:
patent: 6157343 (2000-12-01), Andersson et al.
patent: 6559799 (2003-05-01), Aoyama et al.
patent: 2003/0186725 (2003-10-01), Miya et al.
patent: 2004/0063469 (2004-04-01), Kuwahara et al.
patent: 2004/0070533 (2004-04-01), Azuma
patent: 0 954 053 (1999-11-01), None
patent: 1 235 361 (2002-08-01), None
patent: 1235361 (2002-08-01), None
patent: 11-046180 (1999-02-01), None
European Search Report dated Oct. 28, 2005.
Fujitsu Limited
Issing Gregory C.
Katten Muchin & Rosenman LLP
LandOfFree
Radio frequency signal receiving apparatus, a radio... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Radio frequency signal receiving apparatus, a radio..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radio frequency signal receiving apparatus, a radio... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3720511