Pulse or digital communications – Transmitters – Antinoise or distortion
Reexamination Certificate
2005-06-21
2005-06-21
Le, Amanda T. (Department: 2634)
Pulse or digital communications
Transmitters
Antinoise or distortion
C375S298000, C455S110000, C455S127100, C455S522000
Reexamination Certificate
active
06909757
ABSTRACT:
Embodiments of methods, transmitters, and computer program products are provided for transmitting a signal by adjusting a delay between an amplitude component of the signal and a phase component of the signal based on the transmission power. Error vector magnitude and adjacent channel power ratio are two common criteria used in evaluating transmitter performance. By adjusting the delay between the amplitude component of the transmitted signal and the phase component of the transmitted signal, the error vector magnitude and/or the adjacent channel power ratio may be reduced. The particular delay value that provides the best error vector magnitude performance and/or adjacent channel power ratio performance may differ based on the transmission power level. Therefore, the delay value is adjusted based on the transmission power.
REFERENCES:
patent: 6222878 (2001-04-01), McCallister et al.
patent: 6703897 (2004-03-01), O'Flaherty et al.
patent: 2002/0072346 (2002-06-01), Kato et al.
patent: WO/0054431 (2000-09-01), None
Copy of International Search Report for PCT/US02/15173 mailed Jan. 27, 2003.
Lin et al., “Computer Simulation and Measurement of Error Vector Magnitude (EVM) and Adjacent-Channel Power Radio (ACPR) for Digital Wireless Communication RF Power Amplifiersm,” IEEE 50th Vehicular Technology Conference, Sep. 19, 1999, pp. 2024-2028.
Sevic et al. “Simulation of Power Amplifier Adjacent-Channel Power Ratio for Digital Wireless Communications Systems,” IEEE 47th Vehicular Technology Conference, May 4, 1997, pp. 681-685.
Application Entitled:IQ Modulation Systems and Methods that Use Separate Phase and Amplitude Signal Paths; U.S. Appl. No. 09/703,037, filed Oct. 31, 2001.
Bengtsson Erik L.
Justice Scott R.
Pehlke David R.
Ericsson Inc.
Le Amanda T.
Myers Bigel & Sibley & Sajovec
LandOfFree
METHODS, TRANSMITTERS, AND COMPUTER PROGRAM PRODUCTS FOR... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with METHODS, TRANSMITTERS, AND COMPUTER PROGRAM PRODUCTS FOR..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and METHODS, TRANSMITTERS, AND COMPUTER PROGRAM PRODUCTS FOR... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3461560