Quotables
"For a list of all the ways technology has failed to improve the quality of life, please press three."
Alice Kahn
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 6134434 | System and method for providing service negotiation in a communications network A system and method for providing subscriber unit or base station initiated service negotiation in a wireless communication system. Message generators in the mobile switching center, base station, and subscriber unit compose messages to be transmitted in ... | 10/17/2000 |
| 5943361 | System and method for generating signal waveforms in a CDMA cellular telephone system A system and method for communicating information signals using spread spectrum communication techniques. PN sequences are constructed that provide orthogonality between the users so that mutual interference will be reduced, allowing higher capacity and b... | 08/24/1999 |
| 5870427 | Method for multi-mode handoff using preliminary time alignment of a mobile station operating in analog mode A method for handoff of an analog connection within a cellular communication system which relies upon mobile station synchronization to a system time is disclosed herein. In order to reduce the acquisition time for a mobile station commencing operation in... | 02/09/1999 |
| 5859612 | Method for using an antenna with a rotating beam for determining the position of a mobile subscriber in a CDMA cellular telephone system A method for determining the position of a mobile station within a cellular telephone system having a plurality of base stations. A signal is transmitted from a rotating antenna. The rotating antenna has a beam which rotates around a cell in the cellular ... | 01/12/1999 |
| 5848102 | Method and apparatus for encoding/decoding QAM trellis coded data A method and apparatus for encoding and decoding QAM trellis modulated data. In the transmitter, a subset of bits of an input bit set are convolutionally encoded based upon a punctured convolutional code of a lower data rate to provide a set of coded symb... | 12/08/1998 |
| 5841806 | Method and apparatus for the transmission of energy-scaled variable rate data An apparatus for communicating variable rate data over a communication channel. A modulator that receive frames of user data each comprised of data symbols. The modulator repeats the data symbols within each frame to maintain a constant data rate. A trans... | 11/24/1998 |
| 5822318 | Method and apparatus for controlling power in a variable rate communication system A method and apparatus for controlling transmission power in a variable rate communication system is disclosed. The method disclosed provides for a closed loop power control method. A first remote station controls the transmission power of a second remote... | 10/13/1998 |
| 5802105 | Method and apparatus for testing a digital communication channel A system and method for testing signal transmission quality within a digital communication system is disclosed herein. The system may be incorporated within a digital cellular communication system in which information is exchanged over spread spectrum com... | 09/01/1998 |
| 5784532 | Application specific integrated circuit (ASIC) for performing rapid speech compression in a mobile telephone system A method and apparatus for implementing a vocoder in a application specific integrated circuit (ASIC) is provided. The apparatus contains a DSP core that performs computations in accordance with a reduced instruction set (RISC) architecture. The circuit f... | 07/21/1998 |
| 5777990 | Method and apparatus for providing variable rate data in a communications system using non-orthogonal overflow channels A variable rate transmission system where a packet of variable is transmitted on a traffic channel if the capacity of the traffic channel is greater than or equal to the data rate of the packet. When the rate of the packet of variable rate data exceeds th... | 07/07/1998 |
| 5751901 | Method for searching an excitation codebook in a code excited linear prediction (CELP) coder A method for selecting a code vector in an algebraic codebook wherein the analysis window for the coder is extended beyond the length of the target speech frame. By extending the analysis window, the two dimensional impulse response matrix can be stored a... | 05/12/1998 |
| 5751725 | Method and apparatus for determining the rate of received data in a variable rate communication system The apparatus and method are employed in a communications system has a transmitter and a receiver, where the receiver determines at which of several rates individual frames in a signal have been transmitted by the transmitter. For example, if the transmit... | 05/12/1998 |
| 5751761 | System and method for orthogonal spread spectrum sequence generation in variable data rate systems A method and system for allocating a set of orthogonal PN code sequences of variable length among user channels operative at different data rates in a spread spectrum communication system is disclosed herein. PN code sequences are constructed that provide... | 05/12/1998 |
| 5727123 | Block normalization processor A method and apparatus for implementing a vocoder in a application specific integrated circuit (ASIC) is provided. The apparatus contains a DSP core that performs computations in accordance with a reduced instruction set (RISC) architecture. The circuit f... | 03/10/1998 |
| 5722044 | Method and apparatus for balancing the forward link handoff boundary to the reverse link handoff boundary in a cellular communication system A method and apparatus for matching the location of the forward link handoff boundary to the reverse link handoff boundary. A system constant is chosen which defines the product of the received power and the transmitted pilot power at every base station. ... | 02/24/1998 |
| 5715526 | Apparatus and method for controlling transmission power in a cellular communications system An apparatus and method for controlling a final transmit power, y, of a base station in a cellular communications system that has several channels. The base station has a transmit power tracking gain, y', and a radio frequency transmit power, w. The appar... | 02/03/1998 |
| 5710768 | Method of searching for a bursty signal An integrated search processor used in a modem for a spread spectrum communications system buffers receive samples and utilizes a time sliced transform processor operating on successive offsets from the buffer. The search processor autonomously steps thro... | 01/20/1998 |
| 5710784 | Multirate serial viterbi decoder for code division multiple access system applications A Viterbi decoder for recovering the original bit data stream that was convolutionally encoded as a code symbol stream in a Code Division Multiple Access (CDMA) mobile communication system. The decoder simultaneously decodes at the several data rates asso... | 01/20/1998 |
| 5708446 | Printed circuit antenna array using corner reflector A corner reflector antenna array capable of being driven by a coaxial feed line is disclosed herein. The antenna array comprises a substantially right-angle corner reflector having first and second reflecting surfaces. A dielectric substrate is positioned... | 01/13/1998 |
| 5697055 | Method and apparatus for handoff between different cellular communications systems A method and system for performing an intersystem handoff of communication with a mobile station between base stations of first and second cellular systems is disclosed herein. At the mobile station, a quantifiable parameter of a signal transmitted by a s... | 12/09/1997 |
| 5692006 | Adaptive despreader A method and apparatus for adaptively despreading a direct sequence spread spectrum signal. The direct sequence spread spectrum signal is provided to a transversal filter. The output of the filter is demodulated to provide a soft symbol. The soft symbol i... | 11/25/1997 |
| 5675644 | Method and apparatus for canceling echo accounting for delay variations A method and apparatus for detecting and correcting for variations in the flat delay, which permits smooth echo canceller operation even under dynamic delay conditions. In a delay monitor, the received signal is compared against delayed versions of the ec... | 10/07/1997 |
| 5657420 | Variable rate vocoder An apparatus and method for performing speech signal compression, by variable rate coding of frames of digitized speech samples. The level of speech activity for each frame of digitized speech samples is determined and an output data packet rate is select... | 08/12/1997 |
| 5646991 | Noise replacement system and method in an echo canceller A noise replacement system and method for providing a synthesized noise replacement signal to an output speech channel in an echo cancellation system. A far-end speech signal transmitted through a communications channel may be passed through an echo chann... | 07/08/1997 |
| 5644591 | Method and apparatus for performing search acquisition in a CDMA communications system A novel an improved method of acquisition in a spread spectrum communication system is presented. In the present invention, a large window of PN chip offset hypotheses are searched and if an energy signal is found that might indicate the presence of the p... | 07/01/1997 |
| 5633881 | Trellis encoder and decoder based upon punctured rate 1/2 convolutional codes An encoder for encoding data as trellis coded data and a decoder for decoding the trellis coded data. The encoder uses a rate 1/2 convolutional encoder punctured to a rate k/n to produce n symbols from k input bits. The symbols are converted by a converte... | 05/27/1997 |
| 5621752 | Adaptive sectorization in a spread spectrum communication system A system and method for adaptively sectorizing channel resources within a digital cellular communication system is disclosed herein. The system includes an antenna arrangement for providing at least first and second electromagnetic beams for receiving a f... | 04/15/1997 |
| 5602834 | Linear coverage area antenna system for a CDMA communication system A linear coverage area antenna system for use within a CDMA communication system is described. In a preferred implementation, two linear coverage area antenna structures are positioned in parallel and coupled to a base station. Within the base station, a ... | 02/11/1997 |
| 5600754 | Method and system for the arrangement of vocoder data for the masking of transmission channel induced errors A method and system by which parameter data representative of vocoded speech are organized into a data packet for transmission so as to reduce the impact of transmission channel induced errors on the data packet. A data packet is constructed with certain ... | 02/04/1997 |
| 5577022 | Pilot signal searching technique for a cellular communications system An improved method and system for performing a pilot signal searching operation in anticipation of handoff in mobile station communication between base stations is disclosed herein. The searching operation is described herein as being implemented within a... | 11/19/1996 |
| 5576767 | Interframe video encoding and decoding system A video compression system and method for compressing video data for transmission or storage by reducing the temporal redundancy in the video data is described. A frame of video data is divided into a variable number of blocks of pixel data of varying siz... | 11/19/1996 |
| 5568483 | Method and apparatus for the formatting of data for transmission A method and apparatus for arranging various types of data, and at various rates, into a uniquely structured format for transmission. Data for transmission formatting may be vocoder data or different types of non-vocoder data. The data organized into fram... | 10/22/1996 |
| 5559881 | Network echo canceller An echo canceller and method for cancelling in a return channel signal an echoed receive channel signal where the echoed receive channel signal is combined by an echo channel with an input return channel signal. The echo canceller has a first filter which... | 09/24/1996 |
| 5546459 | Variable block size adaptation algorithm for noise-robust acoustic echo cancellation An apparatus that automatically adjusts the adaptation block size for a least-mean square (LMS) adaptive filter depending on the input signal-to-noise ratio (SNR) is disclosed. The apparatus monitors the instantaneous SNR and continually adjusts the block... | 08/13/1996 |
| 5544196 | Apparatus and method for reducing message collision between mobile stations simultaneously accessing a base station in a CDMA cellular communications system Collisions between messages simultaneously transmitted by multiple spread-spectrum transmitters are reduced by distributing the transmissions over the available resources of the receiver. The transmitters may be mobile stations and the receiver may be a b... | 08/06/1996 |
| 5535239 | Data burst randomizer A method and system, for use in a communication system in which data is transmitted in data frames of a predetermined time duration, for the positioning of the data within the data frames for transmission. A computation circuit computes according to the d... | 07/09/1996 |
| 5528593 | Method and apparatus for controlling power in a variable rate communication system A method and apparatus for controlling transmission power in a variable rate communication system is disclosed. The method disclosed provides for a closed loop power control method. A first remote station controls the transmission power of a second remote... | 06/18/1996 |
| 5511073 | Method and apparatus for the formatting of data for transmission A method and apparatus for arranging various types of data, and at various rates, into a uniquely structured format for transmission. Data for transmission formatting may be vocoder data or different types of non-vocoder data. The data organized into fram... | 04/23/1996 |
| 5504773 | Method and apparatus for the formatting of data for transmission In a digital communication system in which digital data is transmitted in data frames of a preselected time duration, a method and apparatus for formatting digital data in each data frame. A set of data bits of a first data type having a bit count corresp... | 04/02/1996 |
| 5485486 | Method and apparatus for controlling transmission power in a CDMA cellular mobile telephone system A power control system for a cellular mobile telephone system in which system users communicate information signals between one another via at least one cell site using code division multiple access spread spectrum communication signals. The power control... | 01/16/1996 |
