|
Match
|
Document |
Document Title |
|
|
7075967 |
Wireless communication system using block filtering and fast equalization-demodulation and method of operation
There is disclosed a transceiver for use in a base station of a fixed wireless network that communicates with a plurality of subscriber transceivers via time division duplex (TDD) channels. The...
|
|
|
7072418 |
Method and apparatus for performing Nyquist folding frequency modulation
A method and apparatus for re-modulating an RF carrier modulated signal using a Nyquist folding frequency modulation technique. The method modulates a digitized RF carrier modulated signal with a...
|
|
|
7071866 |
2-d range hopping spread spectrum encoder/decoder system for RF tags
An airborne radar interrogates tags on friendly ground vehicles, which when interrogated by a downlink signal from the radar, sends back a very low level uplink message signal that appears...
|
|
|
7072379 |
Transmission circuit
This transmission circuit is used in, for example, a base station in CDMA mobile communication. The transmission circuit has a first delay circuit section which gives a delay to an input signal...
|
|
|
7068703 |
Frequency hop sequences for multi-band communication systems
Techniques to generate FH sequences having excellent correlation properties and to use these FH sequences in multi-band communication systems (e.g., OFDM systems). In one aspect, FH sequences may...
|
|
|
7068709 |
Code synchronous timing determining method upon information reception in CDMA system, determining apparatus, and CDMA receiving apparatus
A code synchronous timing determining method comprising acquiring correlation values of a code at plural timings in each of a plural given time widths included in a given period, storing the...
|
|
|
7068701 |
Data transmission and reception within a spread-spectrum communication system
A long code scrambler has been provided to scramble the data bits prior to QAM mapping. Different data rates are accommodated by using different long code m-tuples sampled at the modulation symbol...
|
|
|
7065383 |
Method and apparatus for synchronizing a smart antenna apparatus with a base station transceiver
A method of synchronizing a smart antenna apparatus with a base station transceiver includes receiving at the smart antenna apparatus control signals being communicated from a base station...
|
|
|
7065125 |
Method and apparatus for multiple access over a communication channel
This invention is a multiple access communication technique by which a multitude of transmitters communicate with receivers using direct sequence spread spectrum signaling. The direct sequence...
|
|
|
7061972 |
GPS receiver having dynamic correlator allocation between a memory-enhanced channel for acquisition and standard channels for tracking
A GPS receiver having channel clusters each having a memory-enhanced channel and several standard tracking channels. The memory-enhanced channel includes a signal memory for accumulating carrier...
|
|
|
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...
|
|
|
7058135 |
Data element reordering function
Apparatuses for reordering a plurality of data elements that utilize a buffer capable of storing at least one data element. The last data element (Pn) is located and moved to the buffer. The data...
|
|
|
7058113 |
Radio LAN system implementing simultaneous communication with different types of information and communication method for the same
A radio LAN (Local Area Network) system includes an access point and a mobile or a fixed station each having a physical layer implemented by a direct spread spectrum system. The LAN system uses...
|
|
|
7054349 |
Method and device for decoding an incident pulse signal of the ultra wideband type, in particular for a wireless communication system
An incident pulse signal of the ultra wideband type conveys digital information that is coded using pulses having a known theoretical shape. A decoding device includes an input for receiving the...
|
|
|
7054347 |
Communication apparatus
Signals sent from a sender by a code division multiple access communication system are input respectively into first to Mth delay units which are disposed parallel to one another. The correlation...
|
|
|
7054348 |
Using real random number generator as proof of time
A truly random sequence of bits is transmitted from a transmitter, such that a receiver can receive and store a portion of the transmission for the duration of time that the receiver is within...
|
|
|
7054346 |
Enhanced frequency hopping in a wireless system
A wireless endpoint employs frequency hopping for communicating signals in a wireless communications system. Over a time period T, the wireless endpoint performs pseudo-random selection of a...
|
|
|
7050478 |
Apparatus and method for synchronizing clock modulation with power supply modulation in a spread spectrum clock system
A spread spectrum clock system ( 11 ) modulates the supply voltage for a circuit ( 10 ) in concert with the circuit clock frequency (C). The system increases the supply voltage for the circuit ( 10...
|
|
|
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...
|
|
|
7050486 |
Path searcher for spread spectrum receiver
A path searcher of a spread spectrum receiver includes a number of correlators each of which produces a replica of a scrambled synchronization code and determines a correlation between the replica...
|
|
|
7046716 |
Dual-mode ultra wideband and wireless local area network communications
A dual-mode ultra wideband (UWB) and wireless local area network (WLAN) communication transceiver is used to implement two disparate systems of UWB and WLAN communications within a single device....
|
|
|
7046743 |
Demodulator for demodulating digital modulated signals
A differential detector produces, for each symbol, a phase difference between received phase information and one-symbol-delayed phase information, and delivers the phase difference to a...
|
|
|
7042926 |
Low complexity multiuser detector
A multi-user detector for use in a CDMA receiver system includes a channel tap interpolator to generate interpolated channel taps for users of interest. The interpolated channel taps occur at...
|
|
|
7035317 |
Single-user decoder metrics for subtractive interference cancellation detectors in code-division multiple-access (CDMA) communication systems with time dependence variance residual multiple-access interference (RMAI)
Improved branch metrics for Viterbi decoders in CDMA systems take into account the time dependency of the variance of the multiple access interference in any user's signal after the single-user...
|
|
|
7031742 |
Forward and reverse link power control of serving and non-serving base stations in a wireless communication system
Techniques for power control of serving and non-serving base stations are disclosed. In one aspect, power control commands for a plurality of base stations are combined to form a single command to...
|
|
|
7031368 |
Adaptive transmitter/receiver
There is provided an adaptive transceiver device which estimates a path arrival direction of a desired wave signal by using a reception antenna weight of a k-th user adaptive reception unit using a...
|
|
|
7031371 |
CDMA/TDMA communication method and apparatus for wireless communication using cyclic spreading codes
A communication system ( 20 ) uses TDMA techniques to distinguish intended recipients of a communication signal ( 26 ) from one another, and direct sequence spread spectrum (DSSS) techniques to...
|
|
|
7027493 |
System and method for medium wide band communications by impluse radio
A system and a method for medium wide band communications using impulse radio techniques. The method of transmitting medium wide band signals includes the steps of producing a sinusoidal signal and...
|
|
|
7027482 |
Transmitter with means for complementarily scaling the input and output signals of a D/A converter
In a spread spectrum transmitter, a number of spread spectrum channel signals are multiplexed into a digital amplitude signal by a multiplexer, and the time-average power of the digital amplitude...
|
|
|
7027483 |
Ultra-wideband communication through local power lines
A system, method and apparatus structured to transmit a plurality of ultra-wideband pulses through an electric power medium is provided. One embodiment of the method comprises an ultra-wideband...
|
|
|
7027421 |
Method and apparatus for searcher beamforming in CDMA base station system using array antenna
This invention relates to a method and apparatus for increasing the performance of searcher by using the array antenna when the signal to interference plus noise ratio is low. The two-dimensional...
|
|
|
7023901 |
Spreading factor estimation system and method
Spreading factor (SF) estimation in a code division multiple access (CDMA) spread spectrum system where the SF of the data channel may change on a frame-by-frame basis to reflect a change in the...
|
|
|
7023897 |
Transmission circuit
A transmission circuit includes a baseband circuit, spreading section, multiplier, digital modulator, quadrature modulator, and antenna. The baseband circuit generates and outputs at least one...
|
|
|
7020175 |
MMSE reception of DS-CDMA with transmit diversity
A pilot signal enters a first MMSE receiver ( 201 ) and a second signal enters a second MMSE receiver ( 202 ). The first MMSE receiver ( 201 ) performs a channel estimate for the received pilot...
|
|
|
7020176 |
Method and system for downlink channelization code allocation in a UMTS
A method and system for downlink channelization code allocation or assignment in a Universal Mobile Telecommunication System (UMTS) are presented. The method and system generate an optimal...
|
|
|
7020177 |
Method and apparatus to transfer information
Briefly, in accordance with an embodiment of the invention, a method and apparatus to transfer information is provided, wherein the method includes transferring information between at least two...
|
|
|
7016653 |
Radio terminal
A radio terminal that receives signals from a plurality of radio stations to calculate its current position has: interference canceling means for canceling each interference signal from the...
|
|
|
7012949 |
OFDM guard band communication apparatus and method
A transmitting apparatus and method may inverse Fourier transform transmit data converted to parallel form to obtain a first signal. The band of a second signal is limited to a guard frequency band...
|
|
|
7012948 |
Method for assigning codes in uplink of synchronous wireless telecommunication system
A method for assigning codes in an uplink of a synchronous code division multiple access (CDMA) telecommunication system is disclosed. The method for assigning a code in a reverse channel of a...
|
|
|
7010621 |
System having a spread-spectrum clock for further suppression of electromagnetic emissions in network devices communicating via a network bus
A network system includes a network having a network bus, such as unshielded differential twisted-pair wires, electrically connected to a plurality of remote devices, and a network controller for...
|
|
|
7010048 |
Multiple access method and system
A wireless communication system transmits data on multiple carriers simultaneously to provide frequency diversity. Carrier interference causes a narrow pulse in the time domain when the relative...
|
|
|
7010014 |
Digital spread spectrum circuitry
The frequency of a skew clock signal is dithered around a base frequency, thereby enabling this clock signal to comply with FCC requirements for electromagnetic emissions within a specified window....
|
|
|
7009958 |
Unified encoding process for generalized multiple access
In a multiple access embodiment user, information is encoded by a combination of symbol encoding and user encoding into a unified multiple access scheme that numerous interstitial encoding...
|
|
|
7006558 |
Method and apparatus for correcting frequency offset and storage medium storing control program thereof
The present invention relates to a method and apparatus for correcting frequency offset of a local oscillator in a direct sequence spread spectrum receiver such as Universal Mobile...
|
|
|
7006554 |
Resource allocation in CDMA wireless communication systems
A dynamic assignment of the spreading codes of a user in a CDMA system is based on multipath channel conditions of that user. The spreading codes are assigned such that multipath signal energies...
|
|
|
7003021 |
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...
|
|
|
7003019 |
Data detection for codes with non-uniform spreading factors
One aspect of the invention simultaneously estimates data transmitted in a spread spectrum communication system using different spreading factors. A plurality of communication signals are received....
|
|
|
7002516 |
Signal detector employing correlation analysis of non-uniform and disjoint sample segments
A wireless communication device (e.g., a cellular telephone) includes one transceiver for voice or data communication and a global positioning system (GPS) receiver a signal for receiving a GPS...
|
|
|
7003043 |
Replica driver mismatch correction using a variable offset comparator
A number of data symbols are driven into a transmission line while simultaneously driving the data symbols into another node. A difference between a signal level from the transmission line and a...
|
|
|
7002902 |
Method and system for economical beam forming in a radio communication system
Codes are applied to signals to reduce the number of transceivers and associated RF cabling extending from base electronics to antenna array electronics in a base station providing beam forming....
|