Method and apparatus for estimating and correcting gain and phase imbalance in a code division multiple access system
OF THE PREFERRED EMBODIMENT While the specification concludes with claims defining the features of the invention that are regarded as novel, it is believed that the invention will be better understoo... Read More
Inventors: Jeong, Gibong;, Assignee: Texas Instruments Incorporated (Dallas, TX) |
Phase lock loop having switchable filters and oscillators
OF THE INVENTION Turning now to the drawings, there is shown in FIG. 1 a conventional phase-lock circuit of the prior art consisting of a phase detector 10, a filter 12, and a voltage-controlled osci... Read More
Inventors: Dickes, Eric J.; Hill, III, Thomas C.; Flegal, Robert T.;, Assignee: Tektronix, Inc. (Beaverton, OR) |
Voltage controlled oscillator operable over a large frequency range
I claim: 1. A voltage controlled oscillator circuit having positive and negative supply rails connectable to a source of operating power, the circuit comprising: first and second bipolar transistors (... Read More
Inventors: Lorenz, Perry;, Assignee: National Semiconductor Corporation (Santa Clara, CA) |
Mobile communicator system
It is a feature and advantage of the present invention to prevent adverse conditions experienced by a mobile communicator from causing the mobile communicator to malfunction or fail. It is another fea... Read More
Inventors: Ross, David J.; Isaacs, Blake L.; Williams, Kevin J.;, Assignee: AMSC Subsidiary Corporation (Reston, VA) |
Finlock alignment mechanism for rockets
The present invention relates to means and methods for the simplified manufacture of rockets having the capability of true flight comprising centering rings which are secured to ring clips which in tu... Read More
Inventors: Hans, Paul C.; Rosenfield, Gary C.;, Assignee: Aerotech, Inc. (Las Vegas, NV) |
Communications system
What is claimed is: 1. A radio communications system in which each of a plurality of transmission means is capable of transmitting transmissions on each of a predetermined set of channel frequencies a... Read More
Inventors: Munday, Peter J.; Massey, Nicholas R.; Harmer, David; Jeffries, James M.;, Assignee: Racal Research Limited (GB2) |
Method and apparatus for over-the-air programming of telecommunication services
The present invention provides a method for enabling a service provider to provide telecommunication service updates to mobile stations without active involvement of the subscribers of those stations.... Read More
Inventors: Daly, Brian Kevin;, Assignee: AT&T Wireless Services, Inc. (Redmond, WA) |
Authenticating the identity of an authorized person
The present invention seeks to provide a solution to the severe difficulties associated with card and other fraud. According to the present invention there is provided a computer system for authentica... Read More
Inventors: Powers, Wesley Grayson;, Assignee: Wesco Software Limited (London, GB) |
Synthesis of improved zero-impedance converter
An improved zero-impedance converter embodying the principles of the invention applied to synthesizing electric motor drive systems of infinite disturbance rejection ratio and zero-dynamics/instantan... Read More
Inventors: Losic, Novica A.; Varga, Ljubomir D.;, Assignee: |
Low noise digital to signal interval converter with audio applications
The present invention relates to digital-to-analog conversion. In particular, it has application to conversion of pulse code modulated signals, such as used in CDs and DVDs, to a pulse width modulated... Read More
Inventors: Damphousse, Simon; Mallinson, A. Martin; Forman, Dustin D.;, Assignee: ESS Technology, Inc. (Fremont, CA) |
Method and system for detecting in-band jammers in a spread spectrum wireless base station
The present invention encompasses a method and apparatus for providing real-time, constant detection of in-band jammers with negligible impact on base station cost. Such real-time spectrum analysis is... Read More
Inventors: Hamdy, Walid; Mathe, Lennart; Sutton, Todd;, Assignee: Qualcomm Inc. (San Diego, CA) |
Method and apparatus for scanning and for electronic processing of thermal pictures
The objects of the present invention are achieved by providing that one inventive characteristic feature is that the scanning speed is selected at right angles to the line direction so that every line... Read More
Inventors: Pusch, Gunter;, Assignee: |
Automatic vehicle identification system capable of vehicle lane discrimination
A method for identifying an object and determining the location of an object is disclosed. The method includes the steps of: focusing a first directional antenna on a first area, focusing a second dir... Read More
Inventors: Sharpe, Claude Andrew;, Assignee: Texas Instruments Incorporated (Dallas, TX) |
Method of polling second stations for functional quality and maintenance data in a discrete multitone spread spectrum communications system
In accordance with this invention, a highly bandwidth-efficient method for transmitting and receiving information is implemented. In one aspect of the invention, a plurality of multiple-access, bandwi... Read More
Inventors: Hoole, Elliott; Jesse, Mary; Mechaley, Jr., Robert G.; Ryan, David James; Stephenson, David;, Assignee: AT&T Wireless Services, Inc. (Redmond, WA) |
Steerable antenna and receiver interface for terrestrial broadcast
The present invention is directed to methods and apparatus for implementing and controlling steerable antennas. Various embodiments of the invention are directed to antennas suitable for indoor use. S... Read More
Inventors: Henderson, John G. N.; Scarpa, Carl;, Assignee: Hitachi America, LTD. (Tarrytown, NY); Hitachi Home Electronics (America), Inc. (San Diego, CA) |
Opto-acoustic transducer and telephone receiver
Referring to the drawings in detail wherein like numerals designate like parts, a telephone receiver 10 includes an earpiece 11 having a customary screen 12 at the forward end of a chamber 13 in whic... Read More
Inventors: Edelman, Seymour;, Assignee: |
Sheet metal waveguide horn antenna
OF THE PREFERRED EMBODIMENT Referring now to FIGS. 2 and 3 of the drawing, there is shown a preferred embodiment of a waveguide horn antenna according to the invention, generally designated as 22. Wa... Read More
Inventors: Risko, John Joseph;, Assignee: RCA Corporation (New York, NY) |
Microwave receiving device
The present invention has been made to solve the conventional problems described above, and has as its object to provide a compact microwave receiving device having functions of a primary radiator and... Read More
Inventors: Shibata, Toshio; Matsumoto, Kenji;, Assignee: Kabushiki Kaisha Toshiba (Kawasaki, JP) |
Transmitting and/or receiving arrangement for portable appliances
The invention is based on the object of improving the transmitting and receiving power of the antenna whilst ensuring that it is simple to produce and easily matched and has a wide bandwidth. The obje... Read More
Inventors: Rasinger, Josef; Scholtz, Arpad-Luwdig; Bonek, Ernst;, Assignee: Siemens Aktiengesellschaft (Munich, DE) |
Terminal structure and a universal low noise blockdown converter using the same
It is therefore an object of the present invention to provide an universal LNB converter and a terminal structure to be used for various appliances having a plurality of terminals such as receiver-sid... Read More
Inventors: Hirota, Makoto;, Assignee: Sharp Kabushiki Kaisha (Osaka, JP) |
Method and system for transmitting audio data together with other data, comprising addressing data, to a receiver
OF THE INVENTION The example illustrated in connection with the accompanying FIGS. 1 and 2 utilises a DAB receiver which incorporates a GSM mobile telephone. A DAB transmission system 1 provides an a... Read More
Inventors: Johnson, Nicholas Dougall;, Assignee: TTPCom Limited (Royston, GB) |
Data processing device
OF THE PREFERRED EMBODIMENTS I. Introduction An educational data processing device according to a preferred embodiment of the present invention will be described with reference to appropriate figures... Read More
Inventors: Kitabatake, Kentaro;, Assignee: Mediafive Corporation (Saitama-ken, JP) |
Teaching method and system
According to the present invention, there is provided an automated system of teaching and lesson management, which requires no classroom teachers. The system eliminates live instructors, while maintai... Read More
Inventors: Young, Kenneth D.; Keidel, Murl J.;, Assignee: Tokheim Corporation (Fort Wayne, IN) |
Self-oscillating mixer circuit
What is claimed is: 1. A self:oscillating mixer circuit comprising: a first input terminal; a first switching diode connected to said first input terminal at one end thereof; a self-oscillating mixing... Read More
Inventors: Saitoh, Takeshi; Akutsu, Eisaku; Shinagawa, Mitsuhisa;, Assignee: Hitachi, Ltd. (JA) |
Radio apparatus
I claim: 1. Radio apparatus, in particular VHF transmitter and receiver apparatus for aeronautical radio, the apparatus comprising a housing having a front side and adapted to be received in a mountin... Read More
Inventors: Kramer, Ludwig; Franz, Otto; Lotze, Walter;, Assignee: Walter Dittel GmbH Luftfahrtgeratebau (Landsberg, DE) |
Two-channel receiver-indicator for phase radio systems
An object of the present invention is to provide a two-channel receiver-indicator for phase radio systems having a high accuracy of phase measurements with low frequency stability of the ground statio... Read More
Inventors: Glumov, Ivan F.; Maiko, Viktor P.; Ziberov, Valery I.; Yaroslavtsev, Nikolai A.;, Assignee: |
Switching circuit for radiosonde
OF THE DRAWINGS With reference to the drawings, the radiosonde is shown as comprising a radio frequency transmitter 10 feeding an antenna 12 being modulated by a "meteorological data" oscillator and ... Read More
Inventors: Dickson, Vernon E.; Lee, James G. C.; Saini, Gurbachan S.;, Assignee: Sangamo Company Limited (CA) |
Method and intelligent digital beam forming system for interference mitigation
OF THE DRAWINGS The present invention provides, among other things, a digital beam former suitable for use in array antennas. In the preferred embodiment the digital beam former provides a method of ... Read More
Inventors: Turcotte, Randy Lee; Ma, Stephen Chih-Hung; Aguirre, Sergio;, Assignee: Motorola, Inc. (Schaumburg, IL) |
Multiple antenna cellular network
The present invention relates to a multiple antenna cellular network. In particular, the invention is used in a cellular communication network to custom configure cell boundaries to accommodate obsta... Read More
Inventors: Chavez, David A.; Sayers, Ian L.; Sage, Gerald F.;, Assignee: InterWAVE Communications International Ltd. (Hamilton, BM) |
Practical space-time radio method for CDMA communication capacity enhancement
Although the following detailed description contains many specifics for the purposes of illustration, anyone of ordinary skill in the art will appreciate that many variations and alterations to the f... Read More
Inventors: Scherzer, Shimon B.;, Assignee: Adaptive Telecom, Inc. (Campbell, CA); Metawave Communications Corporation (Redmond, WA) |
Telecommunications 
