Diversity transmitter/receiver
The object of the present invention is to provide a spread-spectrum diversity transmitter/receiver having a limited scale and moreover, that ensures constant and stable diversity branches. The first s... Read More
Inventors: Tsujimoto, Ichiro;, Assignee: NEC Corporation (Tokyo, JP) |
Interleaver and deinterleaver for use in a diversity transmission communication system
The current invention enhances the performance of a system utilizing interleaving and transmit diversity by reordering the sequence of symbols transmitted along the different transmission channels. Fo... Read More
Inventors: Lundby, Stein S.; Saints, Keith;, Assignee: Qualcomm Incorporated (San Diego, CA) |
System and method for providing packet-switched telephony
It is therefore one object of the present invention to provide a method and system for replacing a circuit-switched network of MSC/VLRs with a packet-switched core network. It is another object of the... Read More
Inventors: Denman, Robert E.; Jackson, Don L.; Hanley, Donald V.; Boudreaux, Paul H.; Maxwell, Stewart H.;, Assignee: Nortel Networks Limited (St. Laurent, CA) |
Two phase local mobility scheme for wireless access to packet based networks
Local mobility within a subnet is supported by classifying wireless base stations, and the routers used to forward packets to those base stations, within defined domains. Domains are typically defined... Read More
Inventors: La Porta, Thomas F.; Murakami, Kazutaka; Ramjee, Ramachandran; Thuel, Sandra R.; Varadhan, Kannan;, Assignee: Lucent Technologies Inc. (Murray Hill, NJ) |
Mobility management in wireless internet protocol networks
In a wireless cellular communications network based on the Internet Protocol (IP) where packets to and from a mobile wirelessly communicating device—called a mobile—(i) are routed on (mo... Read More
Inventors: Reddy, Joseph Soma; Acampora, Anthony;, Assignee: The Regents of the University of California (Oakland, CA) |
Simple multicast extension for mobile IP SMM
In a preferred embodiment, the invention is a method and apparatus for routing data to a mobile node in both home and in foreign domains using the following methodology. A foreign agent sends an adver... Read More
Inventors: Magret, Vincent; Rose, Laurence;, Assignee: Alcatel (Paris, FR) |
Task-driven distributed multimedia consumer system
To this end, the invention provides a control system comprising multiple electronic devices interconnected through a task-driven control means for controlling an interaction among the devices. The con... Read More
Inventors: Chambers, Paul; Srivastava, Saurabh;, Assignee: Philips Electronics North America Corporation (New York, NY) |
Method and apparatus for operating the internet protocol over a high-speed serial bus
In accordance with a first aspect of the invention, a method of reconfiguring the bus lint without disturbing the on-going traffic on the bus is provided. The method includes the step of obtaining the... Read More
Inventors: Lawande, Sachin S.; Ling, Salim;, Assignee: 3Com Corporation (Santa Clara, CA) |
Wireless coupling of incompatible nodes via a virtual network
What is claimed is: 1. A wireless information system for wireless communication with at least one non-standardized node adapted for communication in a communication/protocol compatible with the respec... Read More
Inventors: Sato, Takashi; Hulyalkar, Samir;, Assignee: Koninklijke Philips Electronics N.V. (Eindhoven, NL) |
DS-CDMA multiple user serial interference canceler unit and method of transmitting interference replica signal of the same
An objective of the present invention is to provide a method of transmitting an interference replica signal of a DS-CDMA multiple user serial interference canceler in which the transmission rate at wh... Read More
Inventors: Suzuki, Hideto;, Assignee: NEC Corporation (JP) |
Digital radio frequency interference canceller
Broadly speaking, the invention pertains to radio frequency (RF) interference cancellation techniques that effectively estimate RF interference to transmitted data signals being received using a frequ... Read More
Inventors: Wiese, Brian R.; Bingham, John A. C.;, Assignee: Texas Instruments Incorporated (Dallas, TX) |
Digital radio frequency interference canceller
Broadly speaking, the invention pertains to radio frequency (RF) interference cancellation techniques that effectively estimate RF interference to transmitted data signals being received using a frequ... Read More
Inventors: Wiese, Brian R.; Bingham, John A. C.;, Assignee: Amati Communications Corporation (San Jose, CA) |
Low complexity frequency estimator and interference cancellation method and device
In a first aspect of the invention, a method and apparatus is provided for identifying the frequency of a periodic signal within an electronic signal by treating the periodic signal as the primary sig... Read More
Inventors: Thomson, Larry S.; Alelyunas, Carl H.;, Assignee: 3Com Corporation (Santa Clara, CA) |
Device for generating a digitally modulated test signal
The invention claimed is: 1. A method for generating a digitally modulated test signal comprising: generating a first group of transmission channels comprising I and Q values, in a modulation coder, d... Read More
Inventors: Kernchen, Wolfgang; Braunstorfinger, Thomas;, Assignee: Rohde & Schwarz GmbH & Co. (Munich, DE) |
Spectrum spread transmission method and apparatus
It is an object of the present invention to provide spectrum spread system transmission method and apparatus which allow simultaneous reception of motion pictures or semi-motion pictures at a center t... Read More
Inventors: Akiyama, Toshiyuki;, Assignee: Hitachi Denshi Kabushiki Kaisha (Tokyo, JP) |
Battery-feed circuit for exchange
Accordingly, it is an object of the present invention to provide an improved battery-feed circuit, which can perform the above-described functions, in a circuit of compact construction. According to a... Read More
Inventors: Kawami, Shigeru; Tabu, Takashi; Sano, Shigeo; Masuda, Nobuyuki;, Assignee: Fujitsu Limited (Kawasaki, JP) |
Apparatus and method for mapping E1 signals into a digital cross-connect matrix space
Accordingly, there is a need for apparatus and a method for mapping E1 signals into a digital cross-connect matrix space. E1 signal mapping is needed when an interface unit is provided as a gateway be... Read More
Inventors: Deschaine, Stephen A.; Entezari, Manouchehr; Nietubyc, Mark J.; Heissenhuber, Werner L.;, Assignee: Alcatel USA Sourcing, L.P. (Plano, TX) |
Device for demodulating signals modulated by frequency-shift keying
What is claimed is: 1. A device for demodulating signals modulated by frequency shift, said signals being constituted by sequences of n oscillation trains, n being an integer greater than 1, in which ... Read More
Inventors: Laurent, Pierre;, Assignee: Thomson-CSF (Paris, FR) |
Interface device for converting a computer printer port into an input/output port
The present invention is an interface device in which the printer port of a PC can be used as an input/output port of other than the printer. The present invention provides an interface means which is... Read More
Inventors: Tokui, Satoru; Sueyoshi, Susumu; Nanba, Keiichiro;, Assignee: Pioneer Electronic Corporation (JP) |
Digital direct sequence spread spectrum receiver
OF ILLUSTRATED EMBODIMENTS FIG. 1 shows a block diagram of a direct sequence spread spectrum receiver according to the present invention having an RF signal converter 1, a digitizing IF signal sample... Read More
Inventors: Nuytkens, Peter;, Assignee: The Charles Stark Draper Laboratory, Inc. (Cambridge, MA) |
CDMA mobile communication system and method with improved phase correction features
It is an object of the present invention to provide a mobile station of a CDMA mobile communication system and a detection method used at the mobile station, capable of performing a phase correction p... Read More
Inventors: Ohgoshi, Yasuo; Doi, Nobukazu; Yano, Takashi;, Assignee: Hitachi, Ltd. (Tokyo, JP) |
Method for determining hand-off candidates in a neighbor set in a CDMA communication system
OF THE PREFERRED EMBODIMENT(S) A communication system provides wireless communication in a coverage area and includes a plurality of base stations and at least a mobile station. The plurality of base... Read More
Inventors: Rohani, Kamyar;, Assignee: Motorola, Inc. (Schaumburg, IL) |
Delay line time compression correlation circuit
OF THE DISCLOSURE FIG. 1 is a schematic representation of a control counter 10 which provides the STATE TIME for the delay line time compression correlation circuit of the disclosed invention. The co... Read More
Inventors: Charlton, John D.;, Assignee: The Bendix Corporation (Electrodynamics Div) (N. Hollywood, CA) |
Equalizer and equalizing circuit using the same
Therefore, an object of the present invention is to provide an equalizing circuit which can be formed by equalizers the number of which is smaller than the number of signal paths. Another object of th... Read More
Inventors: Saito, Kazuo;, Assignee: Mitsubishi Denki Kabushiki Kaisha (JP) |
Loran-C signal processor
FIG. 1 shows the detailed block diagram of my novel signal processor 10. The signal waveform input to the signal processor 10 is shown in FIG. 2A and is the signal transmitted by the Loran-C master a... Read More
Inventors: Mercer, William R.;, Assignee: Sanders Associates, Inc. (Nashua, NH) |
CDMA communications method and system
It is therefore an object of the present invention to provide a CDMA communications method and system which can implement variable rate data transmission from a high-rate to low-rate with a small amou... Read More
Inventors: Adachi, Fumiyuki; Sawahashi, Mamoru;, Assignee: NTT Mobile Communications Network, Inc. (JP) |
Automatic power control system for a code division multiple access (CDMA) communications system
The present invention includes a system and method for closed loop automatic power control (APC) for a base radio carrier station (RCS) and a group of subscriber units (SUs) of a spread-spectrum commu... Read More
Inventors: Lomp, Gary; Ozluturk, Fatih; Kowalski, John;, Assignee: Interdigital Technology Corporation (Wilmington, DE) |
Impulse autocorrelation function communications system
I claim: 1. A bi-orthogonal pulse code modulation communication system, comprising: means for generating first and second multi-bit digital noise codes; means for generating first and second RF carrie... Read More
Inventors: Gutleber, Frank S.;, Assignee: The United States of America as represented by the Secretary of the Army (Washington, DC) |
Pickup device for disc player
With the above deficiencies of the prior art in view, it is an object of this invention to provide a pickup device for disc players having brake means for preventing a horizontal angular movement of a... Read More
Inventors: Omoto, Hideo;, Assignee: Nippon Gakki Kabushiki Kaisha (JP) |
Spread spectrum receiving device
In order to achieve the above object, according to the present invention, in a spread spectrum communication device there is disposed means for removing excessive components generated by disturbance, ... Read More
Inventors: Mikoshiba, Nobuo; Tsubouchi, Kazuo;, Assignee: |
Multiplexer-related 
