System for determining RF path loss between an RF source and...

Details System for determining RF path loss between an RF source and... System for determining RF path loss between an RF source and...

2006-03-01

2009-02-10

Dao, Minh D (Department: 2618)

Telecommunications

Transmitter and receiver at separate stations

Having measuring, testing, or monitoring of system or part

C455S067120, C455S067130, C455S067700, C455S115100, C375S224000, C370S224000

Reexamination Certificate

active

07489905

ABSTRACT:
A test method is for determining RF path loss between an RF source and an RF receiver. The RF source may transmit RF power values at a relatively fine granularity, and the RF receiver may generate RSSI values at a relatively coarse granularity and have an unknown hysteresis about each transition between adjacent RSSI values. Hysteresis edges may be determined about a given RSSI value transition at the RF receiver by sweeping RF power values transmitted from the RF source in increasing and decreasing directions. A relationship between the relatively fine granularity RF power values and the relative coarse granularity RSSI values may be determined using the hysteresis transition edges. The RF path loss for a given channel may be determined based upon a given RSSI at a given RF power value and the relationship between the relatively fine granularity RF power values and the relative coarse granularity RSSI values.

REFERENCES:
patent: 5341398 (1994-08-01), DeRango et al.
patent: 5422933 (1995-06-01), Barnett et al.
patent: 5451839 (1995-09-01), Rappaport et al.
patent: 5483669 (1996-01-01), Barnett et al.
patent: 5711005 (1998-01-01), Farrag
patent: 5930721 (1999-07-01), Fried et al.
patent: 5953661 (1999-09-01), Schwinghammer et al.
patent: 6002672 (1999-12-01), Todd
patent: 6285883 (2001-09-01), Bringby et al.
patent: 6308065 (2001-10-01), Molinari et al.
patent: 6466560 (2002-10-01), Lee et al.
patent: 6587671 (2003-07-01), Kanago et al.
patent: 6839657 (2005-01-01), Verbeyst et al.
patent: 6845238 (2005-01-01), Müller
patent: 7389111 (2008-06-01), Petrus
patent: 2001/0026150 (2001-10-01), Kienner
patent: 2004/0062216 (2004-04-01), Nicholls et al.
patent: 2004/0148580 (2004-07-01), de Obaldia et al.
patent: 2004/0209635 (2004-10-01), Hsu et al.
patent: 2004/0266474 (2004-12-01), Petrus
patent: 2006/0017630 (2006-01-01), Kildal
patent: 2007/0019584 (2007-01-01), Qi et al.
patent: 2007/0060067 (2007-03-01), Russka
patent: 2007/0207756 (2007-09-01), Qi et al.
patent: 2007/0207757 (2007-09-01), Qi et al.
patent: 2007/0207799 (2007-09-01), Qi et al.
patent: 2007/0216880 (2007-09-01), Qi et al.
patent: 2008/0058018 (2008-03-01), Scheinert
patent: WO2004054135 (2004-06-01), None
patent: WO2006010026 (2006-06-01), None
Foegelle,Antenna Pattern Measurement: Theory and Equations, Compliance Engineering 2002 Reference Guide, available at www.ce-mag.com/archive/02/Spring/fogelle2.html.
Wiles,CTIA test requirements cover over-the-air performance, OTA Tests, wireless Europe, Oct./Nov. 2004.
CTIA Certification,Method of Measurement for Radiated RF Power and Receiver Performance, Test Plan for Mobile Station Over the Air Performance, Mar. 2005.
CTIA Certification Program,Cellular Communications&Internet Association Method of Measurement for Radiated RF Power and Receiver Performance, Test Plan for Mobile Station Over the Air Performance, Mar. 2003.
Universal Radio Communication Tester R&S CMU200, Rohde & Schwarz, 2004, available at www.rohde-schwarz.com.
Circadiant Tech Brief,Sensitivity Measurement Algorithms, Jan. 2003.
GSM RF Performance Evaluation (Antenna Testing) Pocket Guide, Cetecom, Apr. 16, 2004.
Raadt et al.,Cryptography in OpenBSD: An Overview, In Proc. of the. 1999 USENIX Annual Technical Conference, Freenix Track, pp. 93-101, Jun. 1999.

Affiliated with

Also associated with

Rating

System for determining RF path loss between an RF source and... 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 for determining RF path loss between an RF source and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System for determining RF path loss between an RF source and... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4084796