Interdigital Technology Corporation

Linex Technologies, Inc.

Golden Bridge Technology, Inc.

Scs Mobilecom, Inc.

Scs Telecom, Inc.

Other

Linex Technology, Inc.

Instaview Systems, Inc.

Interdigital Communication Corporation

Interdigital Communications Corporation

Donald L. Schilling

Shimon Moshavi

John Kowalski

Donald L Schilling

John Michael Kowalski

Joseph Garodnick

Gary R Lomp

Sorin Davidovici

David Manela

Emmanuel Kanterakis

Michael Hennedy

Timothy F Moore, Iii

Jimmy Cuong Tran

Elmer Yuen

Frank W Miller

Gilbert E La Vean

Allen G Jacobson

Tuvia Apelewicz

Kenneth J Henrich

A set of spread-spectrum units is capable of operating as a base station or as a remote unit. Each spread-spectrum unit includes a base subunit or a remote subunit, each subunit having a receiver for receiving spread-spectrum signals at a first frequency transmitted from the spread-spectrum units; a signal despreader for despreading the spread-spectrum; a demodulator for demodulating the despread-spread-spectrum signals; a combiner for combining the demodulated signals, and a local signal; a converter for converting the combined signal to a base-data signal; a spread-spectrum circuit for processing the base-data signal; and a transmitter for transmitting at a second frequency the processed base-data signal as a base-spread-spectrum signal.

Spread-spectrum communication unit

A wireless communications handset configured to receive a multipath spread spectrum signal comprises a first antenna and a second antenna. A first receiver is coupled to the first antenna and a second receiver is coupled to the second antenna. A delay device is coupled to the first receiver and delays the portion of the multipath signal received by the first antenna. The delayed signal and the in-phase portion of the signal are then combined in a combining device. A despreader coupled to the combining devices generates a magnitude value of the combined signal. The current magnitude value is then compared to one or more previous magnitude values to determine if the delay should be increased or decreased. A comparison device outputs a comparison signal based on the current and previous magnitude values and provides the comparison signal to the delay device to adjust the delay appropriately.

Base station having a set of phased array antennas

A personal portable communication device includes a deployable display system movable from a stored position to an extended position for use in three-dimensional representations of display data and/or privacy in viewing display data.

Personal portable communication devices with deployable display systems for three dimensional visual representations and/or privacy and methods of use

A system and method for transmitting a plurality of spread-spectrum signals over a communications channel having fading. The plurality of spread-spectrum signals are radiated by a plurality of antennas, with each antenna preferably spaced by one-quarter wavelength. A plurality of receiver antennas receive the plurality of spread-spectrum signals and a plurality of fading spread-spectrum signals. Each receiver antenna is coupled to a plurality of matched filters having a respective plurality of impulse responses matched to the chip-sequence signals of the plurality of spread-spectrum signals. A RAKE and space-diversity combiner combines, for each respective chip-sequence signal, a respective plurality of detected spread-spectrum signals and a respective multiplicity of detected-multipath-spread-spectrum signals, to generate a plurality of combined signals. The symbol amplitudes can be measured and erasure decoding employed to improve performance.

Multiple-input multiple-output (MIMO) spread-spectrum system and method

An improvement to multi-carrier communication, such as an OFDM and MC-CDMA system, where in a multipath or phase distorted channel, the received signal is flat with respect to frequency and linear with respect to phase. A first unit transmits a plurality of multi-carrier signals, which include unmodulated carrier signals. A second unit receives the plurality of multi-carrier signals, and determines the in-phase and quadrature amplitudes or powers of the unmodulated carrier signals of the received multi-carrier signal. The second unit compares the measured in-phase and quadrature amplitudes or powers of the unmodulated carrier signals to predetermined criteria, and generates adjusting data from the compared in-phase and quadrature amplitudes or powers. The first unit uses the adjusting data to pre-distort the next plurality of multi-carrier signals to be transmitted, the in-phase and quadrature amplitudes or powers of the plurality of multi-carrier signals. The first unit transmits, with the in-phase and quadrature phase adjusted per the adjusting data, the next plurality of multi-carrier signals, through the communications channel.

Power control in a multicarrier communications system

System and method for reducing acquisition time of packets in a FDD system, such as a spread-spectrum or OFDM system. A remote unit transmits a multi-tone packet. The multi-tone packet has a plurality of tones with each tone having a different power level, and at a different frequency, from other tones in the plurality of tones. The base station receives the multi-tone packet. The base station compares the plurality of tones from the received multi-tone packet to a threshold or other selection criteria. A tone is selected from the plurality of tones meeting desired selection criteria. Based on the selected tone, the base station transmits a BS packet with the BS packet having power information from the power level of the selected tone.

Reduced time packet transmission in a wireless communications system

Multiple-input multiple-output (MIMO) spread spectrum system and method

A mesh network communication system including one or more mesh networks and a plurality of remote subscriber users employing wireless, spread spectrum type communications for communicating with an access node in one of the mesh networks. The remote subscriber units can be mobile and can use handover to change nodes within a mesh network without a disruption of communication. The system and methods determine the location of a remote subscriber unit in a mesh network by the remote subscriber unit providing the access node with its home address and ID such that if the access node is not the home node, the home node is notified of the visiting node address such that the home node always knows the location of any remote subscriber unit based at the home node. Accordingly, communication between remote subscriber units where one of the remote subscriber units is not currently located at its home node can be accomplished without using the home node.

Mesh network communication systems and methods

A removable computer chip module for use in a communication unit is disclosed. The communication unit also includes a transceiver, an interface in communication with the removable computer chip module, and a controller in communication with the interface. The controller configured to receive a first access number stored on the removable computer chip module. The controller is further configured to control a transceiver in the communication unit such that the transceiver transmits the first access number to access a cellular network and receives a second access number. The controller is further configured to control the transceiver such that the transceiver transmits the second access number to the cellular network for subsequent access to the cellular network. The controller is further configured to receive count information associated with calls from the removable computer chip module.

Removable card for use in a communication unit

A spread spectrum base station for receiving a plurality of spread spectrum signals and a plurality of phased spread spectrum signals includes an antenna and a plurality of delay devices connected to the antenna, each delay device outputting a time-delayed spread spectrum signal. A combiner is connected to the plurality of delay devices for combining the time-delayed signals and the phased signals, the combiner outputting a combined signal. An RF/IF section is connected to the combiner and converts the combined signal into in-phase (I) components and quadrature-phase (Q) components. A plurality of despreaders are connected to the RF/IF section, each despreader despreading the I and Q components of the combined signal into a despread signal. A controller is connected to each of the despreaders and controls a corresponding delay device.

A communication unit comprises a command signal generator for generating a command signal. A transmitter transmits communication signals at one of two frequencies and for transmitting the command signal. A receiver receives communication signals at one of the two frequencies and for receiving the command signal. Upon initiation of the command signal, the command signal is transmitted for receipt by all active units in the system and the unit transmitting the command signal receives communication signals at a selected frequency of the two frequencies and transmits communication signals at another frequency. Upon reception of the command signal from another unit in the system, the unit receiving the command signal transmits a communication signal at the selected frequency of the two frequencies and receives communication signals at the another frequency.

Spread spectrum communication unit

A base station is in a spread spectrum code division multiple access (CDMA) communication system with co-exists with a diverse system of existing users. The diverse system selectively utilizes various frequencies within a selected range of frequencies. The base station generates a plurality of spread spectrum CDMA data signals using pseudo random chip code sequences. The spread data signals encompass the selected range. The base station notch filters the spread data signals at frequencies within the selected range used by the diverse system. The notch filtered spread data signals are transmitted in CDMA cellular radio communications.

Spread spectrum base station notch filtering transmitted signals

A spread-spectrum code division multiple access interference canceller employed by a remote terminal for reducing interference in a direct sequence CDMA receiver having N chip-code channels. The interference canceller includes a plurality of correlators or matched filters, a plurality of spread-spectrum-processing circuits, subtracting circuits, and channel correlators or channel-matched filters. Using a plurality of chip-code signals, the correlators despread the spread-spectrum CDMA signal as despread signals, respectively. The spread-spectrum-processing circuits use a timed version of the chip-code signals, for spread-spectrum processing the despread signals, respectively, with a chip-code-signal corresponding to a respective despread signal. For recovering a code channel using an ichip-code-signal, the subtracting circuits subtracts from the spread-spectrum CDMA signal, each of the N-1 spread-spectrum-processed-despread signals thereby generating a subtracted signal. The N-1 spread-spectrum-processed-despread signals do not include the spread-spectrum-processed-despread signal of the ichannel. The channel correlator or channel-matched filter despreads the subtracted signal.

Growing community of inventors

Sands Point, NY, United States of America

Donald L Schilling