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7069034 Systems and methods for reduced forward link power control delay  
A communication system includes a mobile terminal and a base station. The mobile terminal estimates signal quality of a forward link during a first power control group period and determines a...
7068705 Multiple-input multiple-output (MIMO) spread-spectrum system and method  
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...
7061965 Method and apparatus for assigning Walsh codes  
A Walsh code assigning apparatus includes a retaining unit retaining assignment order information about an order of assignment of the plural Walsh codes such that one Walsh code having a smaller...
7054292 Hybrid synchronous space/code multiple access system using an adaptive antenna system  
A method is disclosed for operating a synchronous space division multiple access, code division multiple access communications system. The method includes steps of, within a coverage area of a...
7050759 Channel quality feedback mechanism and method  
Methods and apparatus are presented for improving the feedback of channel information to a serving base station, which allows a reduction in the reverse link load while allowing the base station...
7050480 Code assignment algorithm for synchronous DS-CDMA links with SDMA using estimated spatial signature vectors  
A method is disclosed for operating a synchronous space division multiple access, code division multiple access communications system. The method operates, within a coverage area of a base station...
7046717 Pre-data power control common packet channel  
A base station (BS) and a plurality of remote stations in a code-division-multiple-access (CDMA) system employ spread-spectrum communication. The base station has a BS-spread-spectrum transmitter...
7039093 Arrangement for adaptive baseband filter selection  
A digital signal detector arrangement comprises at least two selectable baseband filters for receiving a digital signal, a signal estimator receiving the output signal of the selected baseband...
7035315 Doppler corrected communications receiver and method of removing doppler frequency shift  
A method and communications receiver is disclosed that removes Doppler frequency shift in a spread spectrum communications signal. A pilot channel rake section has I and Q Doppler estimation...
7031370 Spread-spectrum communication device  
An example spread spectrum communication system is provided in which a transmission signal is separated into an I-phase component and a Q-phase component. In a complex spreading portion, spreading...
7027817 Method for transmitting an information of a mobile telecommunication system  
Method for transmitting an information representative of the number of spreading codes allocated to the mobile stations in communication with a base station of a mobile telecommunication system,...
7027810 Method of determining electric field state of mobile station also in view of electric field state of uplink  
A method of determining the present electric field state of a mobile station also in view of an uplink electric field state is disclosed. A TPC bit counter is supplied with a received signal...
H002152 Telemetry system having amplitude modulation of Walsh functions  
A digital communications system employing modulated Walsh functions to convey data across a communications channel. In one embodiment, the system includes a transmitter having a constellation...
7012950 Apparatus for generating pseudo-noises code and method for generating pseudo-noise codes using the same  
An apparatus for generating pseudo-noise codes adapted for advancing or retarding pseudo-noise chips generated therefrom within one clock in a radio communication network based on code division...
7013165 Antenna array apparatus and beamforming method using GPS signal for base station in mobile telecommunication system  
There is provided an antenna array apparatus using a GPS signal in a base station and a beamforming method thereof. In the antenna array apparatus, a GPS signal processor receives GPS position...
7012885 Data communications apparatus for cable network  
A data communications apparatus which uses the same frequency band and modulation scheme with those used in the counterpart apparatus, and has a simple configuration and shows high reliability in...
7006583 Method and apparatus for receiving differential ultra wideband signals  
A receiver may receive ultra-wideband, spread-spectrum differential signals. In some embodiments, the receiver may use a variable bandwidth low pass filter. Lowering or raising the bandwidth of...
7003057 Reception AGC circuit  
A reception AGC circuit includes a high-speed power calculating circuit for calculating the power of an input signal at a short period, a normal power calculating circuit for calculating the power...
6996155 Common packet channel  
An improvement to a code-division-multiple-access (CDMA) system employing spread-spectrum modulation, with the CDMA system having a base station (BS) and a plurality of remote stations. The base...
6993102 System and method for clock synchronization for USB sink device  
In a method for adaptive synchronization of a data sink device to a data source device coupled by a USB, data is received and stored in a buffer of the sink device at an average data rate...
6985511 Common packet channel with firm handoff  
An improvement to a code-division-multiple-access (CDMA) system employing spread-spectrum modulation, with the CDMA system having a base station (BS) and a plurality of remote stations. The base...
6985510 Method and system for data and voice transmission over shared and dedicated channels  
In one disclosed embodiment, data information is stored in a buffer in a transmitter. The data information is transmitted on a shared channel and control information for recovering the associated...
6980582 Method for achieving a large capacity of SCDMA spread communication system  
The invention is an implementing method for one kind of large capacity spread-spectrum communication systems. The method is used for increasing system capacity and raising spectral efficiency of a...
6975683 Radio frequency burst interference mitigation  
Coherent phase-shift keying (“PSK”) radio frequency (“RF”) systems locate a differential decoder (“DE”) close to the transmitter of a first transceiver for transmitting a message to a second...
6975669 System and method for performing accurate demodulation of turbo-encoded signals via pilot assisted coherent demodulation  
An efficient telecommunications receiver system for accurately decoding a received composite signal having a data signal component and a pilot signal component includes a first circuit for...
6970497 Intermittent calibration apparatus  
A base station receives a signal resulting from multiplexing a communication signal spread using a signal-specific spreading code and sent by mobile station apparatus and a calibration (CAL)...
6970496 RF modem and communications transceiver utilizing saw device and pulse shaping  
A bidirectional direct sequence spread spectrum half-duplex RF modem that can be applied to transmit and receive numerous types of analog and digital pulse modulation. The modem incorporates a SAW...
6963600 Adaptive interference-free spread-spectrum system employing binary code sequence sets with zero correlation zone properties  
A direct sequence spread spectrum system consisting of modulator and demodulator wherein the spreading sequence with zero correlation zone properties, and the despreading consists of multiplying...
6950456 High-speed cell searching apparatus and method using DPSK-based distributed sample acquisition  
A next-generation mobile communication system is disclosed, including a high-speed cell searching method and apparatus using a distributed sample acquisition scheme (DSA) and a...
6947469 Method and Apparatus for wireless spread spectrum communication with preamble processing period  
A simple and flexible over-air protocol for use with a mobile telephone system, having hand-held telephones in a microcell or other type of cellular communication system. A method in which user...
6940894 Power estimation using weighted sum of pilot and non-pilot symbols  
In one embodiment, the invention is directed toward methods for estimating the power of a received signal encoded with both pilot and non-pilot symbols. The method may include separately...
6937641 Power-controlled random access  
A novel power-controlled random-access method allows a mobile station to gain fast access to the base station. At the mobile station, a composite power control command is devised after an initial...
6934271 Support of multiuser detection in the downlink  
A wireless time division duplex communication system using code division multiple access has a base station and user equipments. The system communicates using communication bursts. Each...
6934318 Method and system for energy based frame rate determination  
A sequence of code symbols is supplied to a rate decision block. The sequence of code symbols can be output from a Viterbi decoder, and may correspond to block encoded and convolutional encoded...
6922432 System for spread spectrum communication  
A signaling system is provided in which a spread spectrum code is cyclically shifted by a cyclical shift dictated by a bit pattern of one or more bits. The cyclically shifted spread spectrum code...
6917641 Method and apparatus for detecting software tampering in a subscriber device  
A subscriber device (2) includes a long code generator (12) and a modifier (30) for generating a spread bit stream with a predetermined error pattern that is transmitted by a transmitter (16) at...
6912241 Chip-interleaved, block-spread multi-user communication  
Techniques are described for maintaining the orthogonality of user waveforms in multi-user wireless communication systems, such as systems using the code division multiple access (CDMA) modulation...
6907060 Method for generating OVSF codes in CDMA multi-rate system  
In this invention, a new tree-structured generation method for obtaining orthogonal variable spreading factor (OVSF) codes that preserve orthogonality between different rates and spreading factors...
6907260 Method for controlling transmit power for communication system  
The present invention provides a transmit power controlling method for reducing an influence of incorrect control in a mobile communication system in the CDMA mode. A likelihood of transmit power...
6904078 CDMA receiver and CDMA transmitter/receiver  
A CDMA receiver and a CDMA transceiver are provided which have high resistance to fading fluctuations, and carry out highly accurate channel estimation, considering the rate of channel...
6892054 Interference suppression for wireless local area network and location system  
A wireless local area network and location system for locating objects within a monitored environment are disclosed. A plurality of access point stations receive and transmit communication signals...
6892175 Spread spectrum signaling for speech watermarking  
Methods and apparatus for encoding an arbitrary digital message, e.g., a watermark, into a speech signal are provided. In one aspect of the invention, a method of embedding digital information in...
6885653 Apparatus and method for allocating channel using OVSF code for uplink synchronous transmission scheme in a W-CDMA communication system  
Disclosed is a channel allocation method in a CDMA communication system. The method comprises receiving from a UTRAN one SF node CSF,k out of 2m−1 SF nodes (where m is an integer larger than 3)...
6882680 Quadrature phase modulation receiver for spread spectrum communications system  
A quadrature phase modulation receiver for a spread spectrum communications system includes a mixer for mixing a received spread spectrum signal with a heterodyne signal to convert the frequency...
6876623 Tuning scheme for code division multiplex broadcasting system  
A CDM satellite transmission system is disclosed that broadcasts programming content, such as audio and video information, using one or more geo-synchronous satellites based on Code Division...
6876692 System for code division multi-access communication  
According to the present invention a received Direct Sequence Code Division Multi-Access (DS-CDMA) signal is differentially decoded at the chip level. A number of signaling schemes can be used in...
6873664 Method and apparatus for detecting an interleaved code  
A receiver that receives a long pseudonoise (PN) code signal composed of two shorter codes interleaved with one another, includes a correlator unit that correlates the received signal with one or...
6873643 Spread spectrum adaptive power control communications system and method  
A spread spectrum communication system has a mobile station and a base station. The base station transmits a spread spectrum signal and a threshold. The mobile station receives the spread spectrum...
6868113 Receiver for spectrum spreading communication system  
A receiver for a spread spectrum communication system includes an acquiring circuit that periodically acquires a plurality of signals received via a plurality of paths from a transmitter. The...
6868077 Device enabling different spreading factors while preserving a common rambling code, in particular for transmission in a code division multiple access cellular mobile radio system  
A device which enables different spreading factors while preserving a comnmon scrambling code, in particular for transmission in a code division multiple access cellular mobile radio system. The...