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7623836 |
Antenna selection for multicarrier communications
Antenna selection is performed in a multicarrier communication system based on antenna scores. In at least one embodiment, an antenna score is calculated for an antenna by determining grades for...
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7599672 |
Millimeter-wave-band radio communication method in which both a modulated signal and an unmodulated carrier are transmitted to a system with a receiver having plural receiving circuits
A receiver receives an RF-band modulated signal transmitted from a transmitter, as well as an un-modulated carrier also transmitted from the transmitter and having a phase noise characteristic...
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7596359 |
Receiving apparatus, transmitting apparatus and transmitting/receiving system
A receiving apparatus is for selecting and receiving a radio signal in a frame structure having an information body part including at least information body and an additional part including...
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7580735 |
Condenser microphone
In a condenser microphone where a microphone capsule and an output module section are connected to each other via a microphone cord, strong electromagnetic waves generated from a cellular phone or...
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7573398 |
System and method of communicating signals
A communication system is presented. The system includes one or more transmitters configured to transmit a signal, where each of the signals generated by the one or more transmitters corresponds to...
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7558533 |
Parameter estimate initialization using interpolation
A receiver is described herein that is capable of receiving and processing a radio signal and further capable of using interpolation to initialize receiver parameters when there is a change in at...
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7535969 |
Frequency selective transmit signal weighting for multiple antenna communication systems
A system and method for generating transmit weighting values for signal weighting that may be used in various transmitter and receiver structures is disclosed herein. The weighting values are...
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7522894 |
Radio receiving apparatus
A radio receiving apparatus includes two receiving antennas, two upstream RF amplifiers, a SAW filter having two input IDTs and an output IDT, a downstream RF amplifier, and a detector circuit. The...
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7515892 |
Base station antenna system and method for estimating mobile station direction in wireless communication system
Disclosed is an operation method of a base station antenna system, which includes receiving signals from at least two antennas to which a mono-pulse scheme has been applied; operating sum channel...
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7512419 |
Method and apparatus for intelligent noise reduction in a distributed communication system
A wireless distribution system includes a number of remote units distributed in a coverage area to receive wireless signals and to provide the signals through the distribution system to input ports...
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7512198 |
Efficient diversity combining for wideband downlink
A communication system employing site diversity combing to increase link availability includes at least two receivers at receive sites within a single downlink beam separated by enough distance to...
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7512083 |
Single chip multi-antenna wireless data processor
A single chip integrated circuit wireless data processor demodulates N separate data signals from M separate antennas simultaneously. The multi-antenna processor can be coupled to a baseband...
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7508864 |
Apparatus and method of canceling interference
Briefly, a wireless communication device having a receiver includes a pilot signal interference canceller and a linear interference suppressor is provided. The pilot signal interference canceller...
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7502355 |
Adaptive multiplexing device for multi-carrier wireless telecommunication systems
A radio frequency (RF) power combiner for connecting multiple base transceiver stations with one antenna assembly includes at least one combining device coupled to at least two base transceiver...
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7496129 |
Method and apparatus for space division multiple access receiver
Methods and systems consistent with this invention receive a plurality of transmitted signals in a receiver having a plurality of receive elements, wherein each transmitted signal has a different...
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7466975 |
GPS and non GPS position finder, emergency, MIMO, spread spectrum, CDMA, GSM and OFDM
Global Positioning System (GPS) and non GPS position finder, emergency, multiple input multiple output (MIMO), multimode, spread spectrum, code division multiple access (CDMA), Global Mobile System...
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7453965 |
Differential transmitter diversity technique for wireless communications
Input signals of each frame are encoded by mapping the signals onto a coordinate system dictated by the symbols of the previous frame, and symbols from a constellation are selected based on the...
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7433660 |
Iterative multi-stage detection technique for a diversity receiver having multiple antenna elements
An iterative multistage detection system and method for orthogonally multiplexing K channels onto a signal processing chain using N orthogonal sequences of length N. The K channels include a first...
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7433414 |
Intelligent array radio architecture
A receiver sets weights for an antenna array according to a series of algorithms including an energy algorithm, a least squares algorithm and a least mean square algorithm.
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7433384 |
System and method for received signal prediction in wireless communications system
Method and apparatus to compute the combiner coefficients for wireless communication systems for a space-time solution. One embodiment trains the weights on a signal known a priori that is time...
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7430190 |
Systems and methods for resource allocation to multiple antenna arrays for maintaining a constant bit rate (CBR) channel
A wireless communication system configured for the efficient allocation of resources is provided. The wireless communication system can include a transmit system having a first set of one or more...
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7409193 |
Predistortion circuit for a transmit system
Systems and methods related to amplifier systems which use a predistortion subsystem to compensate for expected distortions in the system output signal. A signal processing subsystem receives an...
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7403798 |
Wireless base system, and directivity control method
Antennas in an entire radio base station system are divided into two antenna groups so that each group has antennas in the number that allows convergence of reception directivity using a reference...
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7400867 |
Radio broadcast receiver
A radio broadcast receiver is provided which reduces the degradation in quality of diversity-received signals. When a difference in level between a reception signal of a main antenna and a...
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7398067 |
Multiple intermediate frequencies receiver and a method thereof
Embodiment of the invention provides a receiving device having an intermediate frequency section to produce first and second intermediate frequency signals based on first and second received radio...
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7394858 |
Systems and methods for adaptive bit loading in a multiple antenna orthogonal frequency division multiplexed communication system
In an orthogonal frequency division multiplexed (OFDM) system, a transmitter and/or receiver communicate separate data streams on non-orthogonal spatial channels. Each spatial channel may use the...
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7386029 |
Reception device and reception method
At noise component addition section 105 , a noise equivalent value equivalent in size to noise component is calculated using a constant which is dependent on a difference of spreading factors...
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7369834 |
Impedance-matched IQ network for an image rejection circuit
An impedance-matched IQ network includes a phase shift circuit and a back termination. The phase shift circuit includes an in-phase mixer port for receiving the in-phase signal, a quadrature-phase...
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7363016 |
Diversity receiving apparatus and method
A communication system comprises a first signal adjusting unit for amplifying a first signal received by a first antenna; a second signal adjusting unit for amplifying and phase-shifting a second...
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7340016 |
Equalizers for multi-branch receiver
A multi-branch receiver comprises a plurality of signal branches including branch filters to filter respective branch input signals and to produce corresponding branch output signals, a combiner to...
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7339979 |
Adaptive beamforming methods and systems that enhance performance and reduce computations
Wireless communication systems and methods are provided that a) enable progressive beamforming with antenna arrays and subarrays, b) provide current and delayed versions of data-carrying signals,...
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7315730 |
Architecture for a receiver front end having dual output low noise amplifier driving separate pre-selectors coupled to a transformer for single ended output
An architecture for a receiver front end utilizes a dual output low noise amplifier ( 102 ) driving separate, fixed preselectors ( 104, 106 ) coupled to a transformer ( 108 ) to generate a single...
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7313372 |
Stable process induced correction bias circuitry for receivers on single-ended applications
A second single-ended receiver having a first stage for receiving an input signal and outputting a pair of corresponding output signals, and a second stage for receiving the pair of output signals...
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7310503 |
Diversity reception device and diversity reception method
The circuit size of a diversity receiver for an orthogonal frequency division multiplexing signal is reduced, and the diversity effect is increased, by providing a power ratio comparator that...
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7310394 |
LMMSE-based RAKE receiver with channel tap assignment
Methods of recovering data in a received signal sent in a communications media are disclosed. Composite channel impulse responses are first estimated. Channel-tap locations are then assigned to...
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7299017 |
Communication method, receiver and base station
A multi-user receiver which uses at least two antenna elements and in which the influence of interference is reduced, the receiver comprises: means ( 200 ) for pre-filtering a wideband antenna...
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7299012 |
Circuit to add and subtract two differential signals
An electrical circuit to add and subtract differential input signals may be implemented using distributed differential transmission lines having a length substantially equal to one quarter of a...
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7289834 |
Antenna signal processing systems
Antenna techniques particularly for orthogonal frequency division multiplexed (OFDM) communications systems. A signal processing system determines weights for an adaptive antenna, the antenna...
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7289777 |
Power control for non-constant envelope modulation
There is disclosed a method and apparatus for control of a power control loop. The method comprises the steps of: amplifying a non-constant envelope modulation signal to thereby produce an output...
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7280810 |
Multimode communication system
Multimode, multi-function, multiple modulator-demodulator (modem) system containing a fingerprint sensor, detection, identification, authentication, and processing device for one or multiple...
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7277679 |
Method and apparatus to provide multiple-mode spatial processing to a terminal unit
Methods and apparatuses, including computer program products, for spatial processing in a remote terminal unit. One embodiment is a wireless remote terminal receiver in a wireless terminal unit for...
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7260370 |
Wireless communication system using a plurality of antenna elements with adaptive weighting and combining techniques
The present invention provides a method and system for operating a wireless communication system in which received signals from a plurality of antennas are weighted and combined with a beam forming...
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7236740 |
Data retransmission apparatus and method in a mobile communication system employing HARQ technique
A method and apparatus for retransmitting data in a mobile communication system wherein a receiver determines whether an initial data block received from a transmitter has an error. Upon detecting...
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7231227 |
Systems and methods for blind source separation of wireless communication signals
A multi-mode receiver and methods are provided, which use blind source separation (BSS) analysis to distinguish the various wireless communication signals from each other. Specifically, different...
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7221925 |
Broadcast receiver with antenna/frequency diversity
Noise and multipath distortions in a broadcast receiver are reduced by an optimal antenna/frequency diversity concept in which the distortions in the audio signal are evaluated to choose a...
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7215934 |
Iterative multi-stage detection technique for a diversity receiver having multiple antenna elements
An iterative multistage detection system and method for orthogonally multiplexing K channels onto a signal processing chain using N orthogonal sequences of length N. The K channels include a first...
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7209663 |
Apparatus and method for repeating signal by using wireless optical transmission
A repeating apparatus and method using wireless optical transmission is disclosed. The repeating apparatus includes a donor device for transmitting two identical copies of an optical signal by...
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7190799 |
Audio routing for an automobile
An audio signal processing system for a vehicle is disclosed. The vehicle has a plurality of audio output producing devices. The system includes an audio input circuit, a processor, an audio output...
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7187940 |
Decorrelating rake receiver apparatus and method
A decorrelating rake receiver ( 401 ) using a signal processor ( 213 ) and corresponding method ( 1000 ) to determine filter coefficients ( 1005 ). The decorrelating rake receiver includes a...
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7164903 |
Integrated N-way Wilkinson power divider/combiner
An integrated N-way Wilkinson power divider is described. In one embodiment, the N-way Wilkinson power divider uses a conductor layer with a cross-over (or cross-under) resistor insulated from the...
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