Matches 201 - 250 out of 285 < 1 2 3 4 5 6 >
Match Document Document Title
6466611 Multi-user detection using a finite-impulse-response matrix filter  
A method for multi-user detection in a CDMA communication system using a finite-impulse-response matrix filter includes a first step of inputting a received sequence of multi-user data from a...
6466607 Hybrid spread spectrum method and system for wirelessly transmitting and receiving wideband digital data  
A “software” radio in the form of a system is completely configurable and controllable in real-time by software and has a coordination capability to enable scaling to network aggregate data...
6459721 Spread spectrum receiving apparatus  
A receiving apparatus includes a base-band conversion circuit, a synchronizing circuit/code generator and a demodulator. The base-band conversion circuit converts a received signal into a base-band...
6449304 Method of determining the carrier reference phase of coherent demodulation of frequency hopped continuous phase modulated signals with synch words arbitrarily located within the hop  
Unambiguous carrier phase estimation for frequency hop signals of a frequency hopping Gaussian minimum shift keying (GMSK) communication system using coherent demodulation is enabled by channel...
6445726 Direct conversion radio receiver using combined down-converting and energy spreading mixing signal  
A receiver ( 54 ) comprising an input for receiving an RF signal (FIG. 7 ) centered at a first frequency and having a bandwidth. The receiver also comprises a first mixer ( 62 ) for producing a...
6441781 Digital correlator for a receptor of signals from satellite radio-navigation systems  
Digital correlator of a receiver for reception of signals of satellite radio navigation systems which has one or more decision making unit(s) generating detection signals indicative of a strength...
6441780 Receiver for pseudo-noise signals from a satellite radio-navigation systems  
Receiver of pseudonoise signals of satellite radio navigation systems for determining coordinates and time using signals of GLONASS and GPS systems, characterized by small dimensions and absence of...
6381251 Data transmission apparatus and receiving apparatus using orthogonal frequency division multiplex modulation system  
A data transmission apparatus of an orthogonal frequency multiplex modulation system wherein data is transmitted using a plurality of carriers which are in a mutually orthogonal relationship with...
6373881 CDMA receiver using sampled chip sequence for precision synchronization with received data sequence  
A CDMA communication receiver comprises a memory for storing chip samples representing amplitudes of a despreading chip sequence sampled at intervals smaller than chip intervals of the chip...
6373878 Using a fast AGC as part of SIR calculation  
The present invention provides a method for measuring SIR in a WCDMA system where channels are transmitted from a base station using orthogonal channelization codes and the same scrambling codes....
6366603 Spread spectrum communication system  
A spread spectrum communication system including a transmission side for transmitting a frame-structured transmission signal containing at least one preamble (having information on a transmission...
6353643 Smart antenna receiver using pilot signal in CDMA mobile communication system and signal receiving method therefor  
A smart antenna receiver in a CDMA communication system and a signal receiving method therefor. Radio signals received respectively through a plurality of antennas are multiplied by adaptive...
6353627 High data rate spread-spectrum system and method  
A high data rate, high processing gain, direct sequence spread spectrum system that transmits a BPSK or QPSK signal. The system FEC encodes and interleaves data which are collected and stored and...
6345073 Convolutional despreading method for rapid code phase determination of chipping codes of spread spectrum systems  
A convolutional despreading method takes advantage of the algebraic structure of the spreading code and applies convolutional type decoding to received signal chip symbols to rapidly estimate code...
6343094 Spread spectrum signal receiving method and apparatus for CDMA cellular communication  
An improved filter for use in a CDMA receiver having an RF front end for splitting a received signal into I and Q components, A/D converters for converting the I and Q components into I and Q...
6337854 Method of securing communication between two mobiles and associated transmitter  
A method of transmitting an initial message between two radiocommunication stations, possibly mobile stations, in which a first radiocommunication station: inserts a time supplied by a clock in the...
6327257 Code division multiple access transmitter and receiver  
The input data to a CDMA transmitter is used to introduce a slight frequency offset to the clock that is used to generate the CDMA code. At the receiver, the frequency-offset CDMA signal...
6320896 RF receiver having frequency-hopping/direct-sequence spread spectrum signal discrimination  
A receiver is provided for use in an environment in which both frequency-hopping and direct-sequence spread spectrum radio frequency (RF) signals are present. The receiver includes a receive...
6289038 Parallel hopping hybrid direct sequence/slow frequency hopping CDMA system  
A radio system is disclosed for supporting a greater number of users than can be supported in a conventional CDMA system that supports multiple users. The radio system is a hybrid system combining...
6256334 Base station apparatus for radiocommunication network, method of controlling communication across radiocommunication network, radiocommunication network system, and radio terminal apparatus  
A base station apparatus for a radiocommunication network in which radiocommunication with one or more radio terminal apparatuses is established according to a frequency hopping scheme. The base...
6256335 Slow tracking of PN synchronization in a direct-sequence spread-spectrum digital communications system  
In a direct sequence spread spectrum communication receiver, a system and method for recovering the timing of a pseudo-random noise (PN) sequence used for despreading the received signals. In one...
6240125 Method and means for frequency hopping in a radio communication system  
A radio communications systems which utilize channel hopping such that those channels which have high channel quality for a given connection are used more often than channels having lower channel...
6240149 Adaptive transmission diversity apparatus and adaptive transmission diversity method  
An adaptive transmission diversity apparatus utilizes a spread spectrum system, detects radiation patterns of direct and indirect waves, which have arrived in a time-shifted manner, by reception...
6230026 Basestation architecture supporting baseband frequency hopping utilizing time division multiplexed mapping between a radio transceiver and digital signal processing resources  
A wireless telephone architecture employs a broadband transceiver that is coupled to a digital channelizer and digital combiner, such as may employ a real-time Fast Fourier Transform, to extract or...
6223048 Method of generating a frequency-hopping sequence for radio communication, as well as radio facility and radio communication system therefor  
In a GSM (Global System for Mobile communications) system, a lookup table used to scramble intermediate results in a pseudorandom fashion is also used to uniquely associate radio facilities with...
6195383 Digital signal processing apparatus for frequency de-hopping  
A payload of a communications satellite includes several receive chains connected to respective antennas 1 to 4. Each receive chain 6 is hybrid in that analogue filtering is carried out at the...
6192066 Spread spectrum communication apparatus and rake receiver  
A RAKE receiver includes an arithmetic circuit for weighting coefficients. The arithmetic circuit obtains the signal power for each path from the reception amplitude on the path which is detected...
6178195 Method and apparatus for detecting spread spectrum signals using a signal from a secondary source  
A method and apparatus for detecting and tracking spread spectrum signals, such as Global Positioning System (GPS) signals, first obtain precision timing and frequency reference information from a...
6178194 Cellular mobile telephone system  
A cellular mobile telephone system includes a first carrier estimation stage that estimates carrier signals using pilot symbols that have been inserted a signal received by the telephone system....
6178193 Spread spectrum receiver and transmission power control method  
In a spread spectrum receiver, when a preliminarily set integration period for integrating a correlated power of a received signal is significantly offset with respect to a fading period, accurate...
6173004 Frequency hopping communication device  
Frequency hopping communication devices have a frequency slot switching circuit for sequentially switching the frequency slots used for transmission and reception according to a frequency hopping...
6157669 Method and apparatus for preempting burst frequency assignments in a frequency-hopping communication system  
A frequency-hopping communication system preempts certain burst frequency assignments. The communication system is capable of communicating to mobile stations (114, 115) via a radio channel (121)...
6157687 Rake receiving system with fingers selectively participating rake synthesis  
A Rake receiving system distributes parts of a receiving signal to fingers for producing weighted parts, and supplies the parts of receiving signal to a pass controlling sub-system; the pass...
6154482 Spread spectrum communications system and receiver  
When a multiplier receives data transmitted from a transmitting equipment in a spread spectrum communications system, it multiplies the received data by the periodic wave output from a crystal...
6151353 Pre-acquisition frequency offset removal in a GPS receiver  
A direct sequence spread spectrum receiver samples an incoming signal and stores the sample in memory. Prior to sampling and storage, the incoming signal is translated to an IF signal. Also prior...
6137824 Method for estimating signal and noise quality, and a receiver  
The invention relates to calculating an estimate representing noise and signal quality, and to a receiver of a radio system. The highest value of a correlation vector is compared either to the...
6115408 Automatic transmission power level control method in a frequency hopping communication system  
The present invention is an apparatus and method thereof for performing frequency hopping communication with another party over a subset of hopping frequencies from available frequencies. The...
6115407 Frequency hopping communication method and apparatus for modifying frequency hopping sequence in accordance with counted errors  
The present invention is an apparatus and method thereof for performing frequency hopping (FH) communication with another party over an available spectrum of frequencies. The spectrum is arranged...
6094449 Spread spectrum communication synchronization acquisition decoding apparatus  
According to a spread spectrum communication synchronization acquisition demodulating apparatus which can acquire synchronization timing and immediately track variation of the synchronization...
6064695 Spread spectrum communication system utilizing differential code shift keying  
A spread spectrum data communication system utilizing a modulation technique referred to as differential code shift keying (DCSK) transmits data in the form of time shifts between consecutive...
6049562 Multi-branch frequency-hopping receiver  
A method and an equipment for controlling a multi-branch frequency-hopping receiver equipment used in a radio station, especially in a base station of a cellular radio system onto a desired...
6038238 Method to realize discontinuous transmission in a mobile phone system  
The object of the invention is a method to realize discontinuous transmission (DTX) in a telecommunications network, e.g. in a GSM (Global System for Mobile Communications) mobile phone network,...
5832026 Method for correcting errors from a fading signal in a frequency hopped spread spectrum communcation system  
A selective call communication system (10) transmits a frequency hopped spread spectrum signal as a Reed Solomon code word modulated as a four-level frequency shift keying (4FSK) signal. A base...
5828693 Spread spectrum frequency hopping reader system  
An apparatus for sourcing an interrogation signal for use in a object identification system including a frequency hopping source for generation of an interrogation signal which is coupled to a homo...
5812522 Location-ruled radio-integrated network  
An integrated radio frequency communication system, known as a Location-Ruled Radio-Integrated Network (LORRAINE) system, provides integrated voice, data and location services. The radio frequency...
5757844 Spread spectrum receiver  
Good bit error performance is necessary in a spread spectrum receiver even when there is severe fast varying fading fluctuation. To achieve this, the received signal is despread and outputted as a...
5751762 Multichannel receiver using analysis by synthesis  
A method and apparatus for employing negative feedback in a signal processing system to improve the range of signal levels that can be processed is disclosed. First, a feedback signal is subtracted...
5712867 Two-way paging apparatus having highly accurate frequency hopping synchronization  
A method, apparatus and system is described for distributing accurate time-of-day information from an existing telecommunications infrastructure without modifying the existing infrastructure. In...
5625641 Correlator, synchronizer provided with the correlator, and fast frequency hopping spread spectrum receiver provided with the synchronizer  
A synchronizer of a fast frequency hopping spread spectrum receiver includes a correlator and a peak detection circuit for detecting the peak of the output signal of the correlator and outputting a...
5612971 Intermediate frequency receiver apparatus  
A transmitting and receiving system having two or more radios, each capable of transmitting and receiving a transmission signal on two or more radio frequencies where a first radio transmits on a...
Matches 201 - 250 out of 285 < 1 2 3 4 5 6 >