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7616930 |
Determining a phase adjustment in accordance with power trends
Calculating a phase adjustment includes establishing a current phase adjustment for a signal transmitted from a modifying communication device to a feedback communication device. A control signal...
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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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7600247 |
Television tuner
A television tuner that receives a television signal using a smart antenna includes a rescan unit that executes rescan; that is: that when an instruction that instructs direct selection of a...
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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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7499695 |
Configurable all-digital coherent demodulator system for spread spectrum applications
A configurable all-digital coherent demodulator system for spread spectrum digital communications is disclosed herein. The demodulator system includes an extended and long code demodulator (ELCD)...
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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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7398071 |
Loop filter with gear shift for improved fractional-N PLL settling time
An integrated circuit radio frequency (RF) transmitter includes a phase locked loop having a multi-mode loop filter that is operable to provide wide band response with a fast settle time in a...
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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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7349379 |
Channel normalization
Soft estimate normalization for weighted multiantenna high-order modulation data channel together with separate antenna pilot channels using averaging in first time slots of a transmission time...
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7340230 |
Receiver architectures utilizing coarse analog tuning and associated methods
Receiver architectures and associated methods are disclosed that provide initial analog coarse tuning of desired channels within a received signal spectrum, such as a set-top box signal spectrum...
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7333792 |
Multi-carrier receiving method and apparatus
An FFT unit subjects a baseband signal to FFT operation. An IQ-to-phase conversion unit converts an in-phase component value and a quadrature component value of each of a plurality of signals on...
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7330707 |
Hetrodyne receiver and IC
In a heterodyne receiver, the effect of an image interference signal that occurs in a case where a low intermediate frequency is used is alleviated. Circuits ( 12 I), ( 12 Q), ( 13 I), ( 13 Q), and...
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7324794 |
Phase combining diversity
Embodiments of methods of receiving transmitted signals are disclosed. The methods include a first antenna receiving a second signal, a second antenna receiving a second signal, adjusting a phase...
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RE39982 |
Diversity circuit for magnetic communication system
A magnetic communication system includes a transmitter have a single coil transducer, and a receiver having a three orthogonally oriented coil transducers. The signal processing circuitry in the...
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7260168 |
Network measurement method and apparatus
The apparatus measures timing variations, such as the jitter or wander in a timing signal ( 100 ) of a telecommunications network. A recovered clock signal is sampled and digitized to produce a...
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7236743 |
Method and arrangement for noise rejection in a receiver circuit
In a method for interference suppression using a quality-adjustable bandpass filter in a receiver circuit for carrier-modulated received signals (S IN ), the bandpass filtered received signal (B...
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7228104 |
Adaptive canceller for frequency reuse systems
An adaptive interference canceller for canceling an interfering signal corresponding to a delayed, frequency translated, amplitude and phase offset version of a transmitted signal contained in a...
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7203470 |
Phase combining diversity receiving apparatus and method
An in-phase combining diversity receiving apparatus is disclosed by which the size (gain) of a receiving signal as well as its phase is controlled and signals received through each antenna pass...
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7190939 |
Time division IQ channel direct conversion receiver and method therefor
A direct conversion receiver includes a local oscillator for generating a sinusoid, a mixer for receiving an incoming signal and for mixing the incoming signal with the sinusoid, an...
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7184740 |
Direct conversion receiver for calibrating phase and gain mismatch
A direct conversion receiver (DCR) calibrated for phase and gain mismatch is provided. The DCR comprises a poly-phase filter that generates mismatched in-phase and quadrature-phase differential...
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7149491 |
Radio reception apparatus symbol timing control method, and symbol timing control program
In a radio reception apparatus, a quadrature detector provides its digital output signal to a band-limiting filter after lowering a sampling frequency by a sampling frequency converter. Based on a...
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7088955 |
Method and apparatus for acquiring and tracking pilots in a CDMA communication system
Techniques to acquire and track pilots in a CDMA system. In an aspect, frequency acquisition of a number of signal instances (i.e., multipaths) in a received signal may be achieved concurrently...
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7027786 |
Carrier and clock recovery using universal frequency translation
Coherent detection of a received EM signal using universal frequency translation (UFT) is described herein. The received EM signal is sampled according to a sub-harmonic LO signal, where the LO...
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7016404 |
Automatic frequency correction for mobile radio receivers
A device and a method for automatic frequency correction are used in mobile radio receivers. After channel estimation has been performed, the phases of the received data symbols are analyzed in...
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6961394 |
Diversity receiving apparatus capable of preventing reduction of C/N ratio
A diversity receiving apparatus comprises a plurality of antennas, a plurality of receiving circuits connected to the plurality of antennas, respectively, an adding unit for adding reception...
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6959175 |
Receiver capable of receiving radio signals in a preferred state at all times
A receiver has an adder for output intermediate-frequency signals of a plurality of receiving blocks, a demodulator for an added intermediate-frequency signal, adjustable reference-signal generator...
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6944243 |
Diversity reception device outputting maximized C/N ratio of synthesized signal
A diversity reception device includes a plurality of antennas. A plurality of receiver circuits are connected to the corresponding antennas. An adder adds the received signals output from the...
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6870892 |
Diversity receiver with joint baud clock recovery
First and second RF signals in the respective first and second channels of a multiple channel diversity receiver are processed jointly in a joint timing loop filter for baud clock recovery. The...
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6868135 |
Method and apparatus for correcting for a phase shift between a transmitter and a receiver
A method and apparatus for correcting for a phase shift between a transmitter and receiver comprising the steps of:
a) transmitting a signal from a transmitter ( 14 ); b) receiving the...
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6807406 |
Variable gain mixer circuit
In accordance with embodiments of the present invention, a receiver system is provided with a variable gain mixer circuit that is advantageous over current architectures used in wireless...
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6760573 |
Frequency tracking using inner and outer loops
Techniques for inner/outer loop tracking that is stable and provides desirable loop convergence characteristics are disclosed. In one aspect, the contribution from any one inner loop to the...
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6760572 |
Method and apparatus for combining two AC waveforms
Two fixed-phase-related signals of arbitrary (unequal) magnitude are combined without incurring combining loss by use of a signal reflection technique wherein the higher magnitude signal is...
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6760386 |
Receiver and method therefor
Embodiments of the present invention relate generally to receivers. One embodiment relates to a digital FM receiver having multiple sensors (e.g. antennas). In one embodiment, the digital receiver...
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6643500 |
Method and arrangement for radiocommunications
Distortion is reduced in a radiocommunications system in which a radio signal is received with a carrier frequency with a group antenna. The group antenna includes at least two receiver channels...
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6643339 |
Receiver and receiving method
K sub-carrier components from an FFT circuit 101 are output to a sub-carrier demodulating circuit 102 . The sub-carrier demodulating circuit 102 demodulates the k sub-carrier components and...
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6625237 |
Null-pilot symbol assisted fast automatic frequency control (AFC) system for coherent demodulation of continuous phase modulation (CPM) signals and method for implementing same
A null-pilot symbol assisted fast automatic frequency control (AFC) system for coherent demodulation of carrier phase modulation (CPM) includes ( 209 ) a pilot clock driven phase differentiator (...
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6349196 |
Communications system, mobile device and method
A mobile communications device is arranged to receive a modulated signal having a predetermined frequency. A frequency demodulator of the device demodulates the modulated signal, and a frequency...
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6347126 |
Receiver with a frequency offset correcting function
Distortion of a received signal due to intersymbol interference as well as to frequency offset is corrected. For this reason, a frequency offset correcting circuit 21 corrects a received signal...
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6324407 |
Method and apparatus for signal transmission within a wireless communication system
A properly modulated carrier signal exits transmission circuitry (201) and enters a first and a second mixer (203, 205). The modulated carrier is mixed with a first and a second function by the...
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6256340 |
Phased array spread spectrum system and method5
A phased array spread spectrum system for maximizing signal strength of a spread-spectrum signal with multipath through the use of receiving means, delaying means, combining means, despreading...
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6195537 |
Method and apparatus for strong signal suppression in multi-carrier signals
A block radio design is disclosed that prevents the primary analog-to-digital converter from saturating and thus prevents the introduction of intermodulation products into the multi-carrier signal....
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6161001 |
Diversity reception device
A diversity reception device which weights in proportion to the reception level and combines a plurality of reception signals, includes a phase demodulator for demodulating the phase of the...
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6029056 |
Space diversity receiving apparatus
A space diversity receiver apparatus receives signals by two spatially separated antennas, controls the phase of the signal received by one of the antennas by a phase control circuit, combines the...
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5979759 |
IC card reader/writer and its control method
The contact error of a contact section which is brought into contact with an IC card is detected reliably. The level of a reset signal which is supplied to a reset terminal (RST) of an integrated...
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5970397 |
Method for the frequency correction of multicarrier signals and related apparatus
Various methods for terrestrial transmission of digital broadcast signals as DVB, HDTV-T and DAB signals are known. One of these methods is the OFDM method, where the transmitted signal includes a...
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5940451 |
Automatic gain control in quadrature phase shift keying demodulator
An apparatus for automatic gain control (AGC) of a digital QPSK demodulator is disclosed. The apparatus for automatic gain control of a QPSK demodulator comprising a variable gain amplifier for...
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5878093 |
Interference rejection combining with frequency correction
In a communications system wherein a broadcast signal is received by a plurality of antennas each connected to a receiver, the resulting plurality of received signals are jointly subjected to...
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5832369 |
Microwave receiver configured to provide non-referenced distance measurements along with signal magnitude measurements
A receiver configured to measure phase change (Δφ) in a signal transmitted from a microwave signal source, such as a cell site for cellular telephones, the transmitted signal including a carrier...
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5812942 |
Balanced differential radio receiver and method of operation
A balanced differential radio receiver (100) has an antenna (64) operative for receiving a modulated signal. A first pair of mixers (110, 112) each having an input that receives an output (106,...
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5748683 |
Multi-channel transceiver having an adaptive antenna array and method
A receiver (100), transmitter (200) and transceiver (400) in accordance with the present invention overcome the disadvantages of applying adaptive antenna array technology to multi-channel...
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