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7616719 |
Compensation for residual frequency offset, phase noise and sampling phase offset in wireless networks
Improved performance, particularly gain in signal-to-noise ratio (SNR), in high-bandwidth Orthogonal Frequency Division Multiplexing (OFDM) receivers, software and systems is achieved by...
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7616679 |
Method and apparatus for searching cells utilizing down link preamble signal
An apparatus for searching for a cell in a mobile communication system, including: a preamble sequence storage unit storing preamble sequences each of which corresponds to one preamble index, and a...
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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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7613258 |
Apparatus and method for determining GPS tracking loop parameter based on SNR estimation
A method for estimating signal quality of a spread spectrum signal is provided. The method includes squaring a plurality of in-phase correlation results and a plurality of quadrature correlation...
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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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7613222 |
Wideband communication method
A communication method includes establishing a wideband communication link between a first device and a second device, transmitting a first set of consecutive data bits from the first device to the...
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7609786 |
Channel estimation for a communication system using spectral estimation
Techniques for performing channel estimation in a multi-carrier system are described. A frequency response estimate is initially obtained for a wireless channel based on a narrowband pilot sent on...
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7609775 |
Radio communication apparatus and communication method
In a radio communication apparatus for forming a frame with a plurality of slots, and inserting a guard interval into each slot along with data for a mobile station to perform communication, a...
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7609749 |
Method and apparatus for generating non-recursive variable rate orthogonal spreading codes
A method for constructing and selecting non-recursive orthogonal variable spreading factor (OVSF) codes is provided. The method includes: defining a variable B=SF max /SF min , where SF max is a...
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7609747 |
Radio frequency communication network having adaptive communication parameters
Improved apparatus for a radio communication network having mobile transceiver units in communication with base transceiver units. The radio communication network is adaptive in that in order to...
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7609197 |
Method for measuring distance and position using spread spectrum signal, and an equipment using the method
By using the delay profile created by delay profile creating section 102 and the first threshold value 330 received from the first threshold value calculation 105, the first threshold value...
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7606334 |
Channel estimation using pilot symbols
A system for estimating the transfer function of a transmission channel such as the downlink channel in a CDMA system over which a pilot signal and a data signal are transmitted. The system...
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7606290 |
Architecture for signal acquisition with cyclic range search
An architecture for a spread-spectrum transmitter-receiver system in an advanced tactical data link that allows the receiver to readily acquire and synchronize to a desired LPD signal. Signal...
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7606289 |
Overlaying digital signals on analog wireless communication signals
A method and system of providing digital communications over frequencies concurrently utilized for analog communications. In one embodiment, the method ( 400 ) includes the step of establishing (...
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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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7606287 |
Radio frequency communication network having adaptive communication parameters
Improved apparatus for a radio communication network having mobile transceiver units in communication with base transceiver units. The radio communication network is adaptive in that in order to...
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7602834 |
System and method for determining a fine frequency offset of a received signal
A system and method for determining a fine frequency offset of a composite code spread spectrum signal is disclosed. The method includes despreading at least one component of the composite spread...
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7602833 |
Apparatus and method for generating spreading code using jacket matrix and code channel spreading device using the same
Provided is a spreading code generating apparatus using a jacket matrix, a method thereof, and a code channel spreading device using the same. The present research provides an apparatus for...
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7599674 |
Overload protection for receiver front end
An embodiment is a receiver for a communications system that may substantially block unwanted signals in a frequency range to protect the receiver from overload. Simultaneously, the receiver of an...
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7599421 |
Spread spectrum applications of universal frequency translation
Frequency translation and spread spectrum applications of same are described herein. Such applications include, but are not limited to, unified down-conversion and de-spreading, unified...
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7599344 |
Method and apparatus for reducing multi-user processing in wireless communication systems
A method and apparatus is disclosed for reducing multi-user processing at the receiver in wireless communication systems. Detected codes are grouped according to channel impulse response and a...
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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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7596167 |
Allocation method, network element, module and user device
The invention is related to a network element, comprising: means for receiving feedback information from the user device; means for creating a first orthogonality measure by using the feedback...
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7596166 |
Integrated circuit device including a spectrum spread clock generator, method for controlling the device, and ink-jet recording apparatus including the device
An integrated circuit device is provided including a plurality of circuit blocks which operate based on a clock signal. The quartz oscillation circuit outputs a first clock signal. A spectrum...
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7593450 |
Dynamic frequency hopping
A frequency hopping communications system is disclosed. A server is adapted to have one or more radio head interface modules and a call processing software module. The call processing software...
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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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7590163 |
Spread spectrum clock generation
There is provided a method of modifying a first clock to generate a second clock with reduced electromagnetic interference (EMI). The method comprises receiving the first clock, generating an...
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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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7586975 |
Code tracking apparatus and method under a multi-path environment in a DS-CDMA communication system
Disclosed is a code tracking apparatus and method under a multi-path environment in a DS-CDMA communication system. Through the steps of calculating fast path energy on a first path signal by...
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7586972 |
Code division multiple access enhanced capacity system
A code division multiple access (CDMA) communication system using spread spectrum signaling over a communication bandwidth uses two different signal spectra generated using two different respective...
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7583767 |
Method and apparatus for parallel midamble cancellation
Method and apparatus for performing midamble cancellation to remove midamble interference from the convolution tail of data field 1 and the first W−1 chips of the midamble field which results...
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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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7583720 |
Wireless communication method and apparatus for assigning multi-paths to rake receiver fingers
A wireless communication method and system for assigning multi-paths to Rake receiver fingers. A Rake finger assignment database is established in which multi-path signals are categorized into a...
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7583650 |
Frequency multiplexed architecture
A receiver ( 10 ) is arranged to simultaneously receive at least a first (S 1 ) radio frequency signal having a first frequency band ( 1 ) and a second radio frequency signal (S 3 ) having a second...
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7580642 |
Modulation scheme for tedons
A system and method for increasing transmission distance and/or transmission data rates using tedons and an encoding scheme to reduce the number of ones in a data signal is described. For example,...
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7580475 |
Base station having a set of phased array antennas
A spread spectrum base station for receiving a plurality of spread spectrum signals and a plurality of phased spread spectrum signals includes an antenna and a plurality of delay devices connected...
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7580443 |
Clock generating method and clock generating circuit
In a clock generating circuit, while a PLL (Phase-Locked Loop) circuit and a modulator are employed, when a frequency dividing ratio of a feedback-purpose frequency divider in the PLL circuit is...
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7580442 |
Receiving apparatus, receiving method and program thereof
A receiving apparatus adjusts a path search window width in path search processing according to the saved timing information, after saving timing information detected at the time of cell search...
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7573932 |
Spread spectrum clock generator
A spread spectrum clock generator includes a non-volatile memory to store control codes corresponding to a predetermined delay. A delay circuit receives a control code having a predetermined number...
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7570189 |
Radio frequency data capture
A method and system to process a spectrum of radio frequency (RF) signals. An analog to digital (A/D) converter is adapted to sample and digitize a spectrum of radio frequency (RF) signals. The...
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7567636 |
Method and apparatus for performing signal correlation using historical correlation data
A method and apparatus for estimating a satellite signal parameter in a satellite positioning system receiver is described. In an example, a plurality of correlation results between a satellite...
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7564400 |
Spread spectrum radar apparatus
It is an object of the present invention to prevent the sensitivity of radar apparatus from falling. A spread spectrum radar apparatus which detects an object, includes a carrier wave oscillator...
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7561613 |
Digital carrier multi-band user codes for ultra-wideband multiple access
Techniques are described for generating digital carrier multi-band user codes for a baseband ultra-wideband (UWB) signal. The digital carrier multi-band user codes comprise spreading codes that...
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7558311 |
Spread spectrum clock generator and method for generating a spread spectrum clock signal
A spread spectrum clock generator (SSCG) and method of generating a spread spectrum clock (SSC) signal, in which the SSCG may include a controller outputting a given modulation voltage signal based...
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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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7558309 |
Low-interference UWB wireless communication system and processing method thereof and storage medium recorded program of the same
The proposed invention relates to the interference-free Ultra-Wide Band (UWB) wireless communication system using spreading codes with low correlation duration or Zero Correlation Duration (ZCD)...
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7555077 |
Method for path-searcher scheduling
A method for adaptively scheduling activation of a path-searcher for a mobile terminal operative in a telecommunication system. The mobile terminal is capable of receiving multi-path signals...
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7555056 |
Communication apparatus and method
A terminal determined to be a communication partner in advance is subjected to transmission power control, and another terminal receives data with the maximum transmission power. Data to be...
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7555034 |
Apparatus and method for detecting timing error based on cyclic correlation
Provided is an apparatus and method for detecting timing errors based on characteristics of cyclic correlation. The apparatus and method can detect the timing errors of many users by using the...
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7555029 |
Method for decoding a plurality of standard radio waves and standard radio wave receiver
A method and a standard radio wave receiver for receiving a plurality of standard radio waves respectively having signal configurations in accordance with respective specifications which define...
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