Dual-mode radio receiver for receiving narrowband and wideband signals
The present invention provides an improved dual-mode radio receiver operating in a radio communication system that uses either wideband or narrowband signals. The radio receiver demodulates wideband a... Read More
Inventors: Dent, Paul W.;, Assignee: Ericsson Inc. (Research Triangle Park, NC) |
Programmable down-sampler having plural decimators and modulator using same
The present invention discloses a programmable down-sampler, comprising (1) a first mux having a pair of first inputs for receiving a first input signal and a second input signal, a pair of second inp... Read More
Inventors: Huang, Ke-Chiang;, Assignee: Industrial Technology Research Institute (Hsinchu, TW) |
Multi-carrier transmission system utilizing channels of different bandwidth
The present invention is a communication system for sending a sequence of symbols on a communication link. The system includes a transmitter for placing information indicative of the sequence of symbo... Read More
Inventors: Tzannes, Michael A.; Heller, Peter Niels; Stautner, John P.; Morrell, William R.; Jayasimha, Sriram;, Assignee: Aware, Inc. (Bedford, MA) |
Single side-band mixer
Applicant's invention resides, in part, in the recognition that a single sideband mixer including two supposedly 90.degree. phase shifters may be used to produce upper and/or lower sidebands with a hi... Read More
Inventors: Liu, Ting-Ping;, Assignee: Lucent Technologies Inc. (Murray Hill, NJ) |
Disc cartridge with slide shutter having catch pieces
The present invention has accordingly an essential object to provide an improved disc cartridge of a type wherein no separate member such as required in the prior art disc cartridge is employed to mou... Read More
Inventors: Mizutani, Hikaru; Ohta, Kenji;, Assignee: Hitachi Maxell, Ltd. (Osaka-fu, JP) |
Interpolation filter selection circuit for sample rate conversion using phase quantization
The present invention is embodied in a filter selector for generating a filter address value to select one of a number of frequency characteristics to resample first data in a first segment of data to... Read More
Inventors: Hau, Clarence J.; Shields, Jerome D.;, Assignee: Panasonic Technologies, Inc. (Princeton, NJ) |
Method and apparatus for controlling conveyor
OF THE INVENTION I. Hardware Configuration Referring now to the drawings, where like reference characters represent corresponding elements throughout the several views, and more specifically referrin... Read More
Inventors: Couch, Jimmie D.; Crump, Eric C.;, Assignee: Mazak Corporation (Florence, KY); Jorgensen Conveyors, Inc. (Mequon, WI) |
Digital channelizer with arbitrary output sampling frequency
OF THE EMBODIMENTS Referring to FIG. 5, a polyphase channelizer 200 according to an embodiment of the invention employs a shift register 210 to distribute the time series data over input channels 220... Read More
Inventors: Sonalkar, Ranjan V.; Helms, Howard David;, Assignee: AT&T Corp (New York, NY) |
Digital sample rate converters having matched group delay
According to a first aspect of the invention, a method is provided for operating two or more sample rate converters. The method comprises the steps of providing an input clock to each of the sample ra... Read More
Inventors: McLaughlin, Kevin J; Adams, Robert W.;, Assignee: Analog Devices, Inc. (Norwood, MA) |
Decimator apparatus for decreasing the word rate of a digital signal of the type employed in digital telephone systems
OF THE INVENTION Referring to FIG. 1, there is shown a simplified diagram of a telephone communications system employing digital and analog signal paths. Essentially, a single subscriber A is connect... Read More
Inventors: Shenoi, Kishan; Agrawal, Bhagwati P.; Chu, Larry K. I.;, Assignee: International Telephone and Telegraph Corporation (New York, NY) |
Interpolator/decimator filter structure and a notch filter therefor
The present invention is intended as a solution to the problem of providing in excess of 3 dB attenuation at one half of the lower sampling frequency. Interpolator and Decimator filter structures are ... Read More
Inventors: Dyer, Nigel P.;, Assignee: Plessey Overseas Limited (Ilford, GB2) |
Dual tone multi-frequency detector
What is claimed is: 1. An apparatus for identifying a first tone and a second tone present in a signal, the first tone being selected from a group of tones located within a low band and the second ton... Read More
Inventors: Valenzuela, Reinaldo;, Assignee: Codex Corporation (Mansfield, MA) |
Filtering a signal with the use of approximate arithmetical division
One object of the present invention is to provide a method which will enable an arithmetical division of the kind mentioned in the background to be carried out rapidly and with the aid of simple equip... Read More
Inventors: Andre, Tore M.; Khan, Mansoor F.;, Assignee: Telefonaktiebolaget L M Ericsson (Stockholm, SE) |
Motion estimation
It is an object of some aspects of the present invention to provide methods for fast block comparison using SIMD units. It is another object of some aspects of the present invention to provide methods... Read More
Inventors: Sivan, Zohar;, Assignee: International Business Machines Corp. (Armonk, NY) |
Apparatus and method for sampling rate conversion with rational factors
OF A PREFERRED EMBODIMENT For convenience, a glossary of terms used here and their definitions is provided prior to the claims. Apparatus and method of the present invention are explained in the foll... Read More
Inventors: Zarubinsky, Michael; Koifman, Vladimir; Sand, Eliezer;, Assignee: Motorola Inc. (Austin, TX) |
Fixed or adaptive deinterleaved transform coding for image coding and intra coding of video
The present invention solves this problem by using a deinterleaving step prior to the transformation step in combination with a suitable quantization technique. Deinterleaving is a more flexible form ... Read More
Inventors: Puri, Atul; Schmidt, Robert Louis; Wus, John;, Assignee: AT&T Corp (New York, NY) |
Data recovery device
Briefly, according to the invention, there is provided a data recovery device for recovering data symbols having a period T from a received data stream. The data recovery device samples at least one d... Read More
Inventors: Oliboni, Mark L.; Mittel, James G.; Erhart, Richard A.;, Assignee: Motorola, Inc. (Schaumburg, IL) |
Transceiver providing selectable frequencies and spreading sequences
A transceiver for transmitting and receiving digital data in a network environment is described. The transceiver includes both transmitter and receiver sections. The transmitter section is used for en... Read More
Inventors: Cowart, Brooks E.;, Assignee: Echelon Corporation (Palo Alto, CA) |
Jamming suppression of spread spectrum antenna/receiver systems
In accordance with the present invention, there is provided an improved jamming suppression technique and system for spread spectrum antenna/receiver systems. Briefly, according to one feature of the ... Read More
Inventors: Holmes, Jerry D.; Barron, Kenneth S.; Reid, Anthony;, Assignee: Raytheon Company (Lexington, MA) |
Satellite relay system
It is an object, therefore, of the present invention to overcome the disadvantages and limitations of a prior satellite relay system by providing a new and improved satellite relay system. It is also ... Read More
Inventors: Kawai, Makoto;, Assignee: Nippon Telegraph and Telephone Public Corp. (Tokyo, JP) |
Topology-based fault analysis in telecommunications networks
OF THE INVENTION Telecommunications networks are typically monitored by Remote Monitoring Systems (RMSs), as shown in FIG. 1 105, collocated or in close geographic proximity with the network equipmen... Read More
Inventors: Harris, Roger D.;, Assignee: MCI Communications Corporation (Washington, DC) |
Outbound call pacing method which statistically matches the number of calls dialed to the number of available operators
An object of this invention is the provision of an improved call pacing method that can be used in a variety of calling environments. Another object of this invention is the provision of a call pacing... Read More
Inventors: David, John E.;, Assignee: EIS International, Inc (Stamford, CT) |
Apparatus and method for identifying records of overflowed ACD calls
OF A PREFERRED EMBODIMENT FIG. 1 is a block diagram of an automatic call distribution (ACD) system 10 in accordance with an embodiment of the invention. ACDs similar to the type shown in FIG. 1 may b... Read More
Inventors: Dezonno, Anthony J.; Sumner, Roger A.; Blaha, David L.;, Assignee: Rockwell International Corp. (Seal Beach, CA) |
Nonterrestrial cellular mobile telecommunication network
The multidimensional cellular mobile telecommunication system of the present invention extends the usage of existing cellular mobile telecommunication radio frequencies allocated for ground-based com... Read More
Inventors: Ray, J. C.; George, Robert L.; Hoppe, Geoffrey A.; Jones, Stephen S.; McKenna, Daniel B.;, Assignee: Aircell Incorporated (Boulder, CO) |
Methods and apparatus for charging a sense amplifier
We claim: 1. A circuit comprising: a sense amplifier having a node for receiving power; and a first circuit for supplying power to the node, wherein during amplification the first circuit is to supply... Read More
Inventors: Liu, Lawrence; Murray, Michael; Li, Li-Chun;, Assignee: Mosel Vitelic (San Jose, CA) |
Satellite cellular communication methods for performing cell-to-cell handoff
What is claimed is: 1. A method of handing-off a call of an individual subscriber unit (ISU) from a current cell to one of a plurality of candidate cells in a satellite cellular communication system, ... Read More
Inventors: Olds, Keith A.; Redden, James P.; Kurby, Christopher;, Assignee: Motorola, Inc. (Schaumburg, IL) |
Remote control
According to one aspect of the present invention, there is provided a slave receiver for detecting commands in the form of digital signals modulated on a cyclic carrier, the receiver comprising means ... Read More
Inventors: Thompson, David R.;, Assignee: Pico Electronics Limited (Glenrothes, GB6) |
Routing system in data communication with frame relay procedure control
What is claimed is: 1. A routing system for use in each station of first through N-th exchange stations of a data communication network in selecting an alternative route from a plurality of transit tr... Read More
Inventors: Akita, Kunihiko;, Assignee: NEC Corporation (JP) |
Method and apparatus for determining the assignment of a mobile station to equipment lists
It is the object of the invention to determine which equipment list a mobile station is assigned to. The invention takes account of the recognition that the assignment of equipment numbers to equipmen... Read More
Inventors: Pfundstein, Matthias;, Assignee: Alcatel SEL Aktiengesellschaft (Stuttgart, DE) |
Apparatus and method for billing in a wireless communication system
In order to address this need and others, the present invention provides a method and an apparatus for billing in a wireless communication system. The method includes the steps of receiving a mobile i... Read More
Inventors: Tell, Daniel Francis; Scanlon, John M.; Singer, Marty H.; Hose, David A.; Fitch, James A.;, Assignee: Motorola Inc. (Schaumburg, IL) |
Multiplexer-related 
