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7623565 |
Method for providing packet framing in a communication system
An improved method of framing data packets in a direct sequence spread spectrum (DSSS) system that uses one pseudo-noise code (PN-Code) to frame the packet with a start-of-packet (SOP) and...
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7620115 |
Space code block coding and spreading apparatus and method for transmission diversity and CDMA diversity transmitter and CDMA mobile station receiver using the same
A space code block coding and spreading apparatus for transmission diversity, a Code Division Multiple Access (CDMA) diversity transmitter using it, and a CDMA mobile station receiver for receiving...
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7616682 |
Method and device for chronologically synchronizing a location network
Chronologically synchronizing a unique positing signal generated by a positioning-unit device at a known location with a reference positioning signal generated by a reference transmitter at a known...
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7616678 |
Multi-carrier constant envelope signal scheme for power and bandwidth efficient communications
A technique for combining a plurality of signals to form a multi-carrier constant-envelope composite signal includes generating a constant-amplitude inphase (I) composite signal based on a majority...
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7616677 |
Downlink power control with limit to dynamic range using detection of downlink transmit power
An apparatus and method is provided for dynamic range power control of a wireless downlink communication signal, such that target signal quality adjustments are held temporarily when it is apparent...
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7613239 |
Digital signal offset adjusting apparatus and pulse pattern generator using the same
A digital signal offset adjusting apparatus has a capacitor causing an output terminal to pass a high frequency band of an input digital signal. A first coil has one end connected to an input...
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7613158 |
Method of quadrature spreading
The invention provides a method of quadrature spreading suited for use in a software implementation of a code division multiple access communication (CDMA) system. The method includes providing for...
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7609752 |
Transmitter and transmission control method used in random access communication environment
A transmitter comprises a frequency utilization status detector configured to detect the utilization status of an allocated frequency band based on a received signal, a symbol placement...
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7609751 |
Method and apparatus to initiate communications between an unknown node and an existing secure network
A first node initiating communications with a second node already in a secure network sends a discovery burst having a preamble portion and a payload portion. The preamble portion is sent at a...
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7609608 |
Method and apparatus for data transfer using a time division multiple frequency scheme with additional modulation
A method of data transmission according to one embodiment of the invention includes encoding a set of data values to produce a corresponding series of ordered n-tuples. The method also includes...
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7606320 |
Apparatus and method for space-frequency block coding/decoding in a communication system
An apparatus and method for SFBC coding and decoding in a communication system using a plurality of (N t ) Tx antennas are provided. In a transmitter using N t transmit antennas, a pre-coder...
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7606288 |
Burst spread spectrum radio system and method for asset tracking and data telemetry
A system for wireless asset tracking is disclosed. The system includes a plurality of mobile devices. Each mobile device performs two spreading operations with two distinct PN codes, a first PN...
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7602855 |
Method and apparatus for singular value decomposition of a channel matrix
A method and apparatus for decomposing a channel matrix in a wireless communication system are disclosed. A channel matrix H is generated for channels between transmit antennas and receive...
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7602835 |
Multi-rate spread spectrum composite code
A correlator despreads a P/N long code constructed from two or more constituent codes A, B, C having N, M and L elements respectively. In a third stage, L filter taps decorrelate elements of the...
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7596169 |
Method of geometric harmonic signal modulation
The invention relates to electrical network communications engineering and can be used in systems for automatic data collection from intrusion protection and fire alarm sensors, electric, heat,...
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7593477 |
Training sequence for linearizing an RF amplifier
There is disclosed a linearization training sequence that is transmitted by means of a radio frequency transmitter which is comprised in a mobile terminal or a base station of a radiocommunication...
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7593449 |
Multicarrier sub-layer for direct sequence channel and multiple-access coding
Carrier interferometry (CI) methods may be used to provide transmission protocols having various desirable properties. Such properties may include interference rejection, reduced multipath fading,...
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7593383 |
Uplink transmitter in a random phase multiple access communication system
A method for communicating through a multiple access communication interface includes receiving a first signal from a first tag, where the first signal is spread using a predetermined pseudo-noise...
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7590191 |
Means for transmitting two signals on the same frequency at the same time for use in mobile and fixed applications
The invention describes a technique for reusing radio frequencies, i.e., transmitting two signals on the same frequency at the same time. A signal is transmitted on one frequency in one pole. A...
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7590190 |
System and method for forward path gain control in a digital predistortion linearized transmitter
A system and method for controlling the gain in the forward signal path of a digital predistortion linearizer is disclosed. The loop gain of the predistortion system is driven to unity, where a...
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7586979 |
Method for transmitting signals using antenna diversity, for instance in mobile communication systems, transmitter, receiver and computer program product therefor
Encoded digital symbols are transmitted via a first pair of antennas and at least one second pair of antennas. The sets of symbols used for the transmission via the second pair of antennas are...
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7586978 |
GMSK spread modulation
Spread spectrum GMSK signals are presented. Transmission may involve obtaining a sequence of data symbols, obtaining a spread spectrum code comprising a sequence of spread spectrum chips,...
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7586977 |
Transmission power control method, mobile station, and radio network controller
A transmission power control method for controlling transmission power of an enhanced dedicated physical data channel for transmitting uplink user data, includes: storing, at a mobile station, a...
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7586835 |
Apparatus for generating 2D spreading code and method for the same
An apparatus for generating a 2D spreading code and method for the same are proposed. The apparatus for generating the 2D spreading code includes a column counter, a row counter, a codeword...
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7586293 |
Digital modulation circuit
Provided is a digital modulation circuit constructed with only a digital circuit. The digital modulation circuit includes: a clock generator which generates a reference clock pulse having a...
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7583982 |
Method and apparatus to improve channel quality for use in wireless communications systems with multiple-input multiple-output (MIMO) antennas
A technique which improves SINR in a communication system utilizing MIMO antennas is described. Transmitter and receiver components use fixed transmit and receive beamforming matrices and variable...
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7583745 |
Exploiting selection diversity in communications systems with non-orthonormal matrix and vector modulation
The invention relates to methods for scheduling at least one out of K transmission channels k with respective N t,k transmission interfaces and respective N r,k reception interfaces for the...
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7583721 |
Spread spectrum modulator and demodulator
A spread spectrum modulator converts input sequences composed of digital symbols into n≧2 spread-spectrum sequences. The spread spectrum modulator can generate spreading code and can combine the...
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7583638 |
Device and method for processing a digital data signal in a CDMA radio transmitter
A device for processing a digital data signal in a CDMA radio transmitter includes a channelization device, a spectral shaping device and a frequency correction device. The channelization device...
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7580446 |
Radio communication apparatus and radio communication method
Radio communication apparatus includes unit dividing transmit data into first-and-second streams, unit subjecting first-and-second streams to serial-to-parallel conversion to obtain data signals,...
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7580445 |
Nonlinear precoding in code-division multiple access communication system
A precoding technique is herein disclosed for a spread-spectrum transmission system which advantageously addresses intersymbol interference along with multiuser and interchip interference.
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7580444 |
Frequency hopping communication system
The invention provides an adaptive frequency hopping spread-spectrum (FHSS) transmission system and method, which efficiently utilizes available transmission bandwidth, whilst providing robustness...
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7577183 |
Transmission apparatus and peak reduction method
There is a problem that a delay is caused in signal processing by exercising control so as to cause amplitude peaks in a transmission signal to fall in a prescribed range. A transmission apparatus...
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7570712 |
System and method for transmitting ultrawide bandwidth signals
A method is provided for generating a multiple band ultrawide bandwidth signal. In this method, an ultrawide bandwidth devices provides a first reference signal having a first reference frequency,...
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7570626 |
Communication method, transmitting device using the same, and receiving device using the same
A transmission method for transmitting an orthogonal frequency division multiplexing signal the method includes composing, on a per unit time basis, a plurality of carrier groups each composed of...
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7564908 |
Method and apparatus for encryption of over-the-air communications in a wireless communication system
A communication device converts a bit stream to multiple symbols and provides encryption at a physical layer by shifting a phase of each symbol of the multiple symbols to produce multiple encrypted...
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7558335 |
Communication system modulating/demodulating data using antenna patterns and associated methods
A wireless communication system includes a transmitter comprising a serial-to-parallel converter for converting serial data bits to a parallel bit stream, a signal mapper coupled to the...
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7558313 |
Cross-correlated TDMA, spread spectrum, CDMA and OFDM systems
Cross-Correlated Time Division Multiple Access (TDMA), Spread Spectrum, Code Division Multiple Access (CDMA) and Orthogonal Frequency Division Multiplexed (OFDM) modulated OFDM receiver and...
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7558310 |
Multi-scale code division frequency/wavelet multiple access
A new communications architecture combines orthogonal frequency division multiple access OFDMA and orthogonal Wavelet division multiple access OWDMA with multi-scale code division multiple access...
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7545884 |
Digital baseband modulation apparatus and demodulation apparatus
A digital baseband modulation apparatus includes: a spread modulation part for complex spreading an I component signal and a Q component signal of a send signal so as to output an output signal;...
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7545849 |
Signal spectrum spreading and combining system and method
The present invention facilitates efficient and effective combination of multiple spread spectrum signals into a single stream. A spread spectrum signal combination system and method of the present...
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7545846 |
Interference cancellation in a spread spectrum communication system
A code division multiple access communication system transmits a pilot and traffic signal over a shared spectrum. The pilot and traffic signal have an associated code and are received over the...
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7545845 |
Wireless communication system, wireless transmitter, wireless receiver, wireless communication method, wireless transmission method and wireless reception method
The transmitting side encodes a digital signal to be transmitted by using a code not containing any DC component, and transmits the digital signal without using any carrier. The receiving side...
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7536013 |
User equipment identification specific scrambling
A base station for use in a code division multiple access communication system comprises circuitry configured to process a user equipment identification (UE ID) by ½ rate convolutionally encoding...
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7535983 |
Method for identifying the beginning of a UWB pulse sequence
A method for transmitting data in the form of pulse sequences, including a signal synchronization step carried out by a receiver of dataframes DF, in the course of which at least one time window...
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7535951 |
Code division multiplexing communication system
A code division multiplexing communication system which transmits a single signal array in use of band for two channels. A first data generator generates a channel signal array. A data distributor...
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7532691 |
Parallel architecture digital filter and spread spectrum signal receiver using such a filter
This invention relates to parallel architecture digital filter and signal receiver with spectrum spreading using such a filter, the filter may have p shift registers (R p , R i ) with means for...
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7532681 |
Wireless communication apparatus
Before data is transmitted from a plurality of antennas, a plurality of known symbol sequences are transmitted from these antennas. Each known symbol sequence contains a plurality of known symbols...
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7532680 |
Multi-mode radio frequency transmitter
A method is disclosed to operate a multi-mode multi-timeslot RF transmitter, as is an RF transmitter that includes a control unit that operates in accordance with the method. The method includes,...
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7529316 |
Transmitter
A transmitter, that effectively suppresses a peak level of transmit signals, equipped with a peak reduction signal generating means that generates a peak reduction signal. A level of the peak...
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