Matches 51 - 100 out of 155 < 1 2 3 4 >
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7015733 Spread-spectrum clock generator using processing in the bitstream domain  
A spread-spectrum phase-locked loop clock generator includes a PLL circuit, a modulation generator, a bit stream processor and a multiplexer. The modulation generator outputs a bitstream in...
7010018 Fast acquisition procedure for TDD W-CDMA  
A method for the acquisition of burst synchronization signals in a spread spectrum communication system is provided. The method receives a burst synchronization signal, applies a dwelling procedure...
6987796 Method for receiving spectrum spread signals with frequency offset correction  
A method for receiving spectrum spreading signals with frequency shift correct in which the modulation period related to the Doppler effect is estimated by using a preamble and a correction signal...
6941110 Mitigating interference with frequency hopping signals by deriving future hop frequencies  
Techniques to avoid interference with a frequency hopping signal that are of a periodic or quasi-periodic nature that may operate in the same frequency band and proximity with other devices. For...
6934316 Frequency hopping spread spectrum system with high sensitivity tracking and synchronization for frequency unstable signals  
A wireless spread spectrum communication system for transmitting data includes a plurality of end point transmitters and at least one receiver. The end point transmitters transmit data via a...
6930634 Shared memory architecture in GPS signal processing  
A shared memory architecture for a GPS receiver, wherein a processing memory is shared among the different processing functions, such as the correlator signal processing, tracking processing, and...
6870875 Transmission of urgent messages in frequency hopping system for intermittent transmission  
A radio transmission system including many radio transmitters using frequency hopping carriers to intermittently transmit very short messages indicative of status of stimuli associated with the...
6865240 Frame synchronizing circuit  
The frame synchronizing circuit establishes frame synchronization by detecting a sync pattern laid in an incoming frame. The frame synchronization circuit comprises a first frame synchronizing unit...
6856643 Communication system and method for performing fast symbol estimation for multiple access disperse channels  
A method for estimating symbol sequences from multiple transmitters which communicate with common receivers sharing the same medium is disclosed. This invention can be used in wireless...
6831940 System and method for narrowing the range of frequency uncertainty of a doppler shifted signal  
A system and method for narrowing the range of frequency uncertainty of a Doppler shifted pilot signal in a satellite or other communications system with relative signal source and receiver motion....
6810071 Code division multiple access (CDMA) code timing tracking apparatus  
Disclosed is a CDMA (Code Division Multiple Access) code timing tracking apparatus capable of exact code timing synchronization without regard to signal gain change by normalizing signal gain to...
6804290 Method of acquiring signal code phases and geographic positioning receiver  
A method of acquiring signal code phases includes selecting a correlation sum with a greatest magnitude from a set of correlation sums after a predetermined time has elapsed. A geographic...
6795487 Receiver  
A positioning or timing receiver, for receiving pseudo-noise encoded signals includes mask mixers in the main signal paths, prior to accumulators. The mask mixers are fed with mask signals having a...
6795423 System for continuous wave rejection  
A method is disclosed for receiving transmitted signals in the presence of CW interference in a communication system that determines the presence of a code in a received signal by comparing with a...
6778586 Radio communication equipment and communication method  
The radio communication apparatus ( 10 ) comprises a buffer ( 14 ) which temporarily stores data to be sent, a transmission/receiving circuit ( 12 ) having a data transmission circuit ( 30 ) and a...
6771693 Enhanced rake structure  
A rake architecture for a frequency division duplex (FDD) and use also in TDD and TD-SCDMA type communications system, designed to significantly reduce the memory capacity required and thereby also...
6771727 Method and arrangement for synchronizing into a digital signal and maintaining synchronization  
A method and a device are provided for acquiring synchronization to a received digital signal. The signal consists of consecutive frames with a frame synchronization pattern distributed over a...
6757318 Apparatus and method for synchronizing with a communication network by shadowing a page response connection to the network  
A method and apparatus for synchronizing with a network without connecting to the network by shadowing a slave device while a master device connects the slave device to the network. The master...
6751273 Apparatus for compensating a channel distortion in a bluetooth system  
An apparatus for compensating a channel distortion in a Bluetooth system to process a received signal having access codes comprises a multiplier for multiplying the received signal by a previously...
6741613 Hybrid state machine for frame synchronization  
An apparatus comprising a first stage and a second stage. The first stage may have a first plurality of states connected by a first topology. The second stage may have a second plurality of states...
6741638 Bandpass processing of a spread spectrum signal  
A digitally sampled spread spectrum signal is received, despread, and accumulated at a center frequency lower than the sampling rate and higher than zero.
6707841 Spreading code generator  
A spreading code generator generates a spreading code specified by a matrix order and row number, which are matrix elements. The spreading code generator includes a repetitive division circuit for...
6646979 Methods of dynamically assigning channel codes of different lengths in wireless communication systems  
In a wireless communication system, unique methods are presented to dynamically assign channel codes of different lengths in a manner to maintain orthogonality among assigned channels. In one...
6643320 Receiver for DS-CDMA signals  
A receiver for direct sequence spread spectrum code division multiple access signals (DS-CDMA) particularly for GPS signals includes a plurality of correlators. Each correlator includes variable...
6628699 Receiving a spread spectrum signal  
A receiver for use in a spread spectrum communication system includes the following components: an acquisition system configured to detect a transmitted spread spectrum signal by simultaneously...
6590928 Frequency hopping piconets in an uncoordinated wireless multi-user system  
A wireless network includes master and slave units. The master sends a master address and clock to the slaves. Communication is by means of a virtual frequency hopping channel whose hopping...
6580764 Channel characteristics estimation apparatus  
To estimate the channel characteristics on the basis of the time differences of the sample points, and to reduce memory capacity and processing steps required for the estimation. The first adder...
6549559 Apparatus and method for locking onto a psuedo-noise code in an IS-95 spread spectrum communications system  
In response to an error signal, a pseudo-noise generator ( 312 or 416 ) generates an on-time pseudo-noise signal, an early pseudo-noise signal delayed by less than one-half of a chip interval,...
6507600 Frequency hopping code division multiple access system and method  
The present invention is a communication system and method having a base station for communication with multiple remote units. The system comprises a base station which utilizes a plurality of sets...
6501744 Slotted mode in wireless CDMA systems  
A slotted communication mode employed in a wireless code division multiple access (CDMA) communication system includes slotted frames interspersed among normal frames, each slotted frame containing...
6473410 Communication method and apparatus in which first and second control channels operate as an initial acquisition channel and a broadcast channel, respectively  
In a base station of a wireless telephone system, the control channel is set efficiently. A channel group for control information communication is provided as a channel to transmit from a base...
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...
6414951 Method for detecting short codes in CDMA systems  
A method is disclosed for receiving a transmitted signal in a communication system employing CDMA techniques wherein the transmitted signal includes a plurality of short codes, each of which is...
6404757 Reception method and apparatus in CDMA system  
A code division multiple access system includes the steps of sequentially generating reception symbols by de-spreading a reception signal, generating a threshold on the basis of an average...
6404801 Method for satellite tracking and extracting the signal by correlation  
The apparatus and method of the present invention is designed to receive SATPS satellites encoded information using a high gain antenna and pre-process the encoded information. The apparatus...
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...
6332008 Synchronizer and method therefor and communications system incorporating same  
Users or subscribers of a spread spectrum synchronous communications system provide signals to the central station or base unit of that system, and receive signals therefrom. Proper synchronization...
6330271 CDMA receiver that shares a tracking device among multiple rake branches  
A CDMA receiver includes a plurality of RAKE branches for despreading the received CDMA signals over a corresponding plurality of paths and a single tracking device that is shared among the...
6298054 Method and apparatus in a wireless messaging unit for acquiring transmitter or receiver synchronization  
A wireless messaging unit (122) determines (704) that a first channel (402), which utilizes a first plurality of time slots for transmission, does not have a signal suitable for acquiring...
6292508 Method and apparatus for managing power in a frequency hopping medium access control protocol  
The present invention is directed to managing power consumption in a wireless frequency hopping communication among a plurality of nodes. For example, the present invention is directed to features...
6205167 Apparatus and method for code tracking in an IS-95 spread spectrum communications system  
A pseudo-noise generator (516) generates an on-time component, an early component and a late component of a pseudo-noise code signal in response to an error signal. The on-time component is routed...
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...
6128504 Apparatus and method of contention resolution for a plurality of handset units in a cordless telephone system  
A cordless telephone arranged for operation in a frequency hopping system includes an arrangement which allows multiple cordless telephone portable units to operate in close reception proximity to...
6118805 Method and apparatus for performing frequency hopping adaptation  
The invention relates to a communication system (300) having a receiver (304) that is capable of performing targeted interference suppression. An interference classifier (314) within the receiver...
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...
6112094 Orthogonal frequency hopping pattern re-use scheme  
Frequency hopping techniques which provide greater interference averaging are described. Cells having the same hopping sequence select sequence offsets pseudo-randomly in a manner which ensures...
6108366 Method and apparatus for the generation of frequency hopping sequences  
A frequency hopping generator comprises an XOR processing module and a PERM (permutation) processing module arranged in series. The XOR and PERM modules act directly on input clock lines as a...
6104322 Apparatus for acquiring code phase lock in direct sequence spread spectrum systems  
The apparatus receives an input signal via an antenna or cable 2, and the signal is applied to a frequency converter 4. Frequency converter generates complex I Q baseband signals which are applied...
6101213 Method system and computer program product for spread spectrum communication using circular waveform shift-keying  
A method, system, and computer program product for spread spectrum communication is provided using circular waveform shift-keying (CWSK). Circular waveform shift-keying is a modulation technique...
Matches 51 - 100 out of 155 < 1 2 3 4 >