Pulse or digital communications – Transceivers
Reexamination Certificate
2005-01-18
2005-01-18
Bocure, Tesfaldet (Department: 2631)
Pulse or digital communications
Transceivers
C455S073000, C455S324000
Reexamination Certificate
active
06845126
ABSTRACT:
A transceiver includes a transmitter and a homodyne receiver, wherein the receiver is used to process both antenna-received and antenna-reflected signals. Thus, during a receive mode, for example, the receiver downconverts antenna-received signals to baseband signals, which are then processed to recover receive signal information. Then, during a transmit mode for example, antenna-reflected transmit signals are fed back to the receiver, which is retuned to the desired transmit frequency, and thus downconverts the reflected transmit signals to baseband signals. These baseband signals are then processed to obtain a characterization of impedance mismatch between the transceiver's transmitter and the associated antenna. An adjustable matching network disposed in the transmit signal path thus may be adjusted based on the characterization to reduce the mismatch. Such configurations may be used with either single-band or multi-band embodiments of the transceiver, and the transceiver may be used in both TDMA and CDMA communication systems.
REFERENCES:
patent: 4028645 (1977-06-01), Tressa
patent: 4422047 (1983-12-01), Wright
patent: 4580092 (1986-04-01), Squire
patent: 5241702 (1993-08-01), Dent
patent: 5483680 (1996-01-01), Talbot
patent: 5564086 (1996-10-01), Cygan et al.
patent: 5749051 (1998-05-01), Dent
patent: 5777475 (1998-07-01), Vester
patent: 5778308 (1998-07-01), Sroka et al.
patent: 5890051 (1999-03-01), Schlang et al.
patent: 6009312 (1999-12-01), Dolman
patent: 6297780 (2001-10-01), Kirisawa
patent: 20020101907 (2002-08-01), Phillips
patent: 0 865165 (1998-09-01), None
patent: 1 209 815 (2002-05-01), None
patent: 2 365 628 (2002-02-01), None
patent: WO 0031885 (2000-06-01), None
patent: WO0173454 (2000-10-01), None
WCDMA, Chapter 6, pp. 171-205.
Dent Paul W.
Dolman Rodney A.
Bocure Tesfaldet
Telefonaktiebolaget L.M. Ericsson (publ)
LandOfFree
System and method for adaptive antenna impedance matching does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System and method for adaptive antenna impedance matching, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for adaptive antenna impedance matching will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3376942