51
Eric J Salyers, Shawn H Gallagher: Managed access system with mobile wireless device geolocation capability. HARRIS CORPORATION, Allen Dyer Doppelt Milbrath & Gilchrist P A Attorneys at Law, February 28, 2017: US09584252 (1 worldwide citation)

A managed access system for mobile wireless devices (MWDs) in a facility that is geographically within a wireless communications network includes a plurality of antennas arranged at the facility. Radio equipment is coupled to the antennas. A management access controller cooperates with the radio equ ...


52
Prakash Gopalakrishnan, Alisa Yurovsky: Optimizing circuit layouts by configuring rooms for placing devices. Cadence Design Systems, Schwegman Lundberg & Woessner P A, September 3, 2013: US08527928 (1 worldwide citation)

A computer-readable medium stores a specification for a circuit layout. The specification includes: a configuration of rooms for placing devices, one or more room constraints for the configuration of rooms, one or more groups of devices for the rooms, and one or more device constraints for devices i ...


53
Ian J Forster: Reflective communication using radio-frequency devices. Christensen O Connor Johnson Kindness PLLC, December 8, 2009: US07630684 (1 worldwide citation)

The present invention relates to a reflective communication system that allows information from wireless communication devices, such as radio-frequency identification devices (RFID), to be reflectively communicated to a receiver in lieu of using a separate communication system. A transmitter transmi ...


54
Terry M Schaffner: RF chirp signal propagation delay measurement. Digi International, Fogg & Powers, March 10, 2015: US08976060 (1 worldwide citation)

Distance between two radio frequency devices is estimated by receiving a plurality of spread spectrum chirp signals frequency offset from one another, and evaluating the received plurality of spread spectrum chirp signals for relative phase shifts between the plurality of spread spectrum chirp signa ...


55
Hua Cai, Yanzhao Pang, Wei Wang, Wei Xue: Method and apparatus for implementing digital baseband predistortion. Huawei Technologies, October 7, 2014: US08855233 (1 worldwide citation)

An apparatus for implementing digital baseband predistortion includes a transmission channel including a digital-to-analog converter, a modulator, an amplifier and a power amplifier, and further includes a feedback channel analog part including a diode detector, a filter and an analog-to-digital con ...


56
Sunil Dewan: Secure RFID packaging. First Data Corporation, Kilpatrick Townsend & Stockton, November 22, 2011: US08063781 (1 worldwide citation)

Methods and systems are provided for preparing radio-frequency devices for secure distribution. Multiple such radio-frequency devices are received. Each device has an embedded radio-frequency transponder. Each radio-frequency devices is moved sequentially to stations of a preparation device. At a fi ...


57
Vittorio Cavirani, Francesco Trotta, Luca Marcaccioli, Roberto Vincenti Gatti, Franco Manzini, Domenico Di Terlizzi: Radio frequency positioning system for vehicles. Elettric 80 S p A, Tutunjian & Bitetto P C, February 4, 2014: US08643536 (1 worldwide citation)

A positioning system for radio frequency devices includes a two-way radio antenna, for vehicles, having a transmitting and a receiving element. Reference antennas have retro-directive arrays which can shape the signal beams in elevation; polarize transmission and reception signals according to a cir ...


58
Alexandru Catalin Ionescu: System and method for subscribing for internet protocol multimedia subsystems (IMS) services registration status. T Mobile USA, Perkins Coie, January 3, 2017: US09538492 (1 worldwide citation)

A system and method that allows mobile device applications to receive changes in registration status from application services that are accessed via an Internet Protocol Multimedia Subsystem (IMS). Applications on a mobile device subscribe to receive notifications of changes in registration status f ...


59
Timothy C Kuo, Mansour Keramat, Edward Wai Yeung Liu: In-situ gain calibration of radio frequency devices using thermal noise. NVIDIA Corporation, Cooley, April 23, 2013: US08428194 (1 worldwide citation)

An apparatus for calibrating gain of an radio frequency receiver (“Rx”) is disclosed to provide, among other things, a structure for performing in-situ gain calibration of an RF integrated circuit over time and/or over temperature without removing the RF integrated circuit from its operational confi ...


60
Brian Kean, Jennifer Larsen, David William Cully, James L Collette: Radio-frequency-device personalization. First Data Coporation, Townsend and Townsend and Crew, January 27, 2009: US07482908 (1 worldwide citation)

Radio-frequency devices that have internal radio-frequency chips are personalized. A radio-frequency device is inserted into a package. An identifier is read electromagnetically from the radio-frequency chip with a radio-frequency transceiver while the radio-frequency device is within the package. P ...



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