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| Number | Title | Issue Date |
| 8160503 | Method and system for characterizing a radio channel of a wireless network using variability of synchronization A speed parameter or channel quality parameter are determined in a mobile device based on variation in frequency offset measurement. A higher variation in the frequency offset measurement reflects a poorer channel quality and a higher speed; a lower variation in the... | 04/17/2012 |
| 8131224 | Delay, gain and phase estimation for measurement receivers Phase and gain of a transmit signal are measured at a transmitter by determining a first time delay having a first resolution at a measurement receiver between a reference signal from which the transmit signal is generated and a measured signal derived from the tran... | 03/06/2012 |
| 8126405 | Method for estimating condition of wireless channels A method measures a time from transmitting a ranging signal to receiving the ranging signal via a channel of a wireless network, and a received signal strength (RSS) of the ranging signal. A distance is estimated based on the time, and a path loss based on the RSS. ... | 02/28/2012 |
| 8103219 | Method and apparatus for frequency control in wireless communications The automatic frequency correction value applied by a receiver is altered to minimize long-term drift of a path delay profile. In one embodiment, the phase or timing error resulting from constant frequency corrections is accumulated, and an estimated frequency corre... | 01/24/2012 |
| 8064840 | Method and system for determining spectrum availability within a network A method and transceiver for determining spectrum availability within a give area is disclosed. The given area includes cells in a grid. A belief evaluator receives a measurement from a signal and assigns an instantaneous belief indicator, an instantaneous disbelief... | 11/22/2011 |
| 7983622 | Using phase difference to determine valid neighbors A method and system is disclosed for using phase shift to determine valid neighbors in a wireless communication system. A phase difference, measured at an access terminal, between an expected phase and an observed phase of a pilot signal from a given wireless servic... | 07/19/2011 |
| 7962102 | Method and system for adaptive ray launching A system (170) and method (300) for ray launching is provided. The system can include a transmitter (110) for successively launching a plurality of rays, and a receiver (120) for receiving transmission rays and reflection rays. A controll... | 06/14/2011 |
| 7957700 | Transmitter delay and phase adjustment A transmitter, including at least two transmitter units, each transmitter unit being configured to input an instance of a digital transmit signal, to convert the digital transmit signal to an analog radio signal, and to amplify the analog radio signal. The transmitt... | 06/07/2011 |
| 7907909 | Method and system for radio frequency (RF) group delay compensation in a broadcast system A radio device operable to compensate for a large RF filter group delay variation is provided. The radio device includes a receiving unit operable to receive an OFDM signal that comprises pilot subcarrier signals and data subcarrier signals. The radio device further... | 03/15/2011 |
| 7873326 | RFID beam forming system A multi-protocol, multi-band array antenna system may be used in Radio Frequency Identification (RFID) system reader and sensory networks. The antenna array may include array elements with an integrated low noise amplifier. The system may employ digital beam forming... | 01/18/2011 |
| 7853219 | Doppler frequency detector, doppler frequecny estimating method, and recording medium recorded with a program for allowing a computer to execute the method Disclosed is a Doppler frequency detector for detecting a Doppler frequency of a received signal. The detector includes a channel estimating unit, a channel phase variation amount calculating unit, a Doppler frequency estimating unit and a calculation interval calcu... | 12/14/2010 |
| 7826800 | Method and system for determining a time delay between transmission and reception of an RF signal in a noisy RF environment using phase detection The present application describes a method and system for determining a time delay between a transmission and a reception of an RF signal in a noisy environment. The method comprises: transmitting the RF signal; shifting a phase of the RF signal after a first time p... | 11/02/2010 |
| 7769350 | System and method for adapting system parameters in radio based communications systems A method for adapting at least one system parameter (i) defining a connection between a transmitter unit and a receiver unit in a radio based communications system, wherein an adaptation frequency at which the system parameter (i) is adapted is dependent on at least... | 08/03/2010 |
| 7599665 | Selection of radio resources in a wireless communication device The invention relates to a method for selecting radio resources for a communication session in a wireless communication terminal. In order to facilitate the selection of quality of service between diversified terminals, terminal capabilities are described by a set o... | 10/06/2009 |
| 7587174 | Antenna unit and radio base station therewith A radio base station apparatus provided with an array antenna having a plurality of antenna elements for calibrating a phase difference among the array antenna elements. The base station has a probe signal adding unit which divides one probe signal and adds the divi... | 09/08/2009 |
| 7496330 | Phase adjusting method and apparatus In a phase adjusting method and device in which a phase deviation between main signal frames themselves returned from a station end device through an antenna end device to the station end device without using a control signal for the phase adjustment, a reference si... | 02/24/2009 |
| 7486934 | Service area determination method for determining whether a mobile terminal is in the service area of a repeater or in the service area of a radio base station A propagation delay-propagation loss table is stored in advance in a radio base station, a first area and a second area being set in advance in the propagation delay-propagation loss table, the first area being predicted to contain the relation between the propagati... | 02/03/2009 |
| 7457589 | Circuit and method for transmitting a signal A circuit for transmitting a signal has a first signal line and a second signal line, wherein the second signal line is arranged adjacent to the first signal line, such that an interaction between signals being transmitted on the signal lines takes place. The circui... | 11/25/2008 |
| 7440766 | Method for employing multipath propagation in wireless radio communications A method of employing multipath propagation in wireless radio communications uses an omnidirectional transmitting/receiving antenna at one end of a transmission link to send an interrogating signal across an environment subject to multipath disturbances to a phase-c... | 10/21/2008 |
| 7433395 | Reliable multicarrier communication in the presence of timing phase error A method, system and apparatus for reliable multicarrier communication in the presence of timing phase error is disclosed. Phase noise due to a sampling-time phase mismatch between a transmitter device and a receiver device is measured in a signal. A Gaussian noise ... | 10/07/2008 |
| 7433652 | Electro-magnetic propagation modeling A generalized framework is disclosed in which a wide variety of propagation models can be cast in a matrix-based format using arbitrary matrix coefficients. Casting propagation models in the matrix-based framework enables efficient computer implementation and calcul... | 10/07/2008 |
| 7430413 | Method and device for simulating a radio channel The invention relates to a device and a method for simulating a radio channel, wherein a signal transmitted and received by more than one antenna is simulated. The method comprises supplying an input signal of each antenna to a similar delay line, each delay line co... | 09/30/2008 |
| 7426370 | Radio communication quality measuring apparatus, radio communication quality measuring method and radio base station The present invention is aimed to provide a radio base station that communicates with a plurality of mobile stations by a method, such as the space division multiplex, of simultaneously multiplexing into the same frequency, and exercise a control using an index that... | 09/16/2008 |
| 7424402 | System and method for making synchronized signal measurements at spaced apart locations A system and method is disclosed which allows for the simultaneous capturing of signals at a plurality of diverse locations. In one embodiment, all transmissions received at each location are recorded for a period of time and after that period of time the recorded t... | 09/09/2008 |
| 7400896 | Apparatus and method for estimating a signal power to interference power ratio in a wireless communication system A transmission and reception apparatus and method for use in a wireless communication system, and an apparatus and method for adaptively transmit and receive a signal according to channel state in a wireless communication system. An apparatus for adaptively performi... | 07/15/2008 |
| 7398052 | Method and a system for detecting communication relaying network elements A method for determining if a signal received at a radio receiver in a communication system is transmitted to the receiver via a direct radio link comprising the steps of: determining a signal characteristic based on one or more signal measurements collected at the ... | 07/08/2008 |
| 7398056 | Channel estimation applique for multiple antenna wireless communications Multiple antenna wireless communication systems require accurate knowledge of the transfer function between all paths. This invention discloses a system wherein a test signal generator at a transmitter station and a facsimile generator at a receiver station go throu... | 07/08/2008 |
| 7392018 | Channel estimation applique for wireless communications A test signal generator at a transmitter station and a facsimile generator at a receiver station go through an acquisition and tracking process which aligns the two signals, removing errors in the time base of generation, the frequency offset of generation and the t... | 06/24/2008 |
| 7373245 | System and method for networking a plurality of nodes A system and method for networking a plurality of nodes is disclosed. A network of data devices having data representations of connectivity, network node position, and/or position topologies is also disclosed, wherein the network may be self-configuring and the netw... | 05/13/2008 |
| 7366475 | Signal strength measurements in cellular telecommunication systems A mobile station (MS) and method for estimating received signal strength of a radio signal from a neighboring cell in a cellular radio telecommunication network. The MS measures the received signal strength of the radio signal over a plurality of frames, and calcula... | 04/29/2008 |
| 7363009 | Method and apparatus for determining propagation delays for use in wide area networks A system and method for determining a signal propagation delay between a transmitter and a receiver, and for adjusting a transmission time based on the propagation delay. A central station inserts a marker into a transmitted signal at a time corresponding to a recei... | 04/22/2008 |
| 7352737 | Communications in an asynchronous cellular wireless network Systems and techniques are disclosed for establishing a reference corresponding to the timing of a received signal from the first source, determining the timing for each received signal from a plurality of second sources, adjusting the reference to the timing of the... | 04/01/2008 |
| 7349443 | Method and device for synchronizing data transfer devices A method and a device for synchronizing data-transmission devices, in which devices a data signal is transmitted in the form of a stream of data bursts between a first station and a second station. A reference signal is transmitted in connection with the specific da... | 03/25/2008 |
| 7342986 | Digital PLL device A phase-locked-loop device includes a clock generator for generating a reference clock based on a binarized playback signal and a frequency of run-length data and for generating N-phase clocks using the reference clock, a pulse-length measuring device for measuring ... | 03/11/2008 |
| 7336634 | Method and system for generating and updating transmission rate for link adaptation in IEEE 802.11 WLAN A method and system for determining the transmission rate between a plurality of stations in a wireless local area network (WLAN) are provided. Each mobile station evaluates the current link condition based on the Received Signal Strength (RSS) from received frames ... | 02/26/2008 |
| 7333774 | Method of optimizing wireless communication links using stored channel characteristics of different locations Techniques for location-assisted wireless communication use real-time location(s) of wireless transceiver(s) together with stored location-indexed channel information to improve communication over a wireless channel between the transceiver(s). The stored channel inf... | 02/19/2008 |
| 7330700 | Radio apparatus and method for determining the communication timing of a channel quality indicator (CQI) based on CQI update and CQI repetition count information When a CQI that is based on CQI update cycle information and a CQI that is based on repetition count information have an overlapping transmission timing, CQI transmission timing controller 110 and CQI transmission timing priority determiner 120 transmi... | 02/12/2008 |
| 7325182 | Method and circuit arrangement for testing electrical modules The invention relates to a method for testing electrical modules. A test pattern of input signals is applied to each module to be tested as test specimen, and the actual responses of the test specimen to the test pattern is compared with the desired responses. The c... | 01/29/2008 |
| 7321579 | Method for analyzing data transmission throughput in a wireless LAN A method is provided for analyzing data transmission throughput in a wireless LAN of a multi sector environment. The method may include determining a sum of symbols of all sector switch guard times and propagation delay guard times of a MAC frame. The method may als... | 01/22/2008 |
| 7319686 | Frame synchronization in multi-cell systems with a data interface A method of timing in a multi-cell system requiring synchronization of frames in transmission is provided. Transceivers of a wired data interface between a central controller and multiple base stations are synchronized to a frame timing clock up to a difference in p... | 01/15/2008 |
