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7613439 |
Programmable baseband filters supporting auto-calibration for a mobile digital cellular television environment
Methods and systems for programmable baseband filters supporting auto-calibration in a mobile digital cellular television environment are provided. Aspects of the method may include generating...
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7593715 |
System and method for detecting activity on a frequency band
Described is a method for detecting activity on a frequency band. A wireless signal of a predetermined radio frequency band is received. The signal is processed into a plurality of subsignals, each...
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7577974 |
Movies channel
The present invention provides a movie channel to a user on a mobile device. Movie based content associated with a movie channel is automatically delivered and stored on a mobile electronic device...
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7577415 |
Method and apparatus for ultra wideband power control
A method for power control in an ultra wideband impulse radio system includes: (a) transmitting an impulse radio signal from a first transceiver, (b) receiving the impulse radio signal at a second...
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7577413 |
Method and apparatus for calibrating a filter of a receiver
According to a disclosed method, a calibration signal is provided at a first frequency corresponding to a low frequency edge of a desired passband to an input of a filter ( 240 ). A first value is...
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7577412 |
System and method for detecting narrow bandwidth signal content to determine channel occupancy
A system and method for detecting the presence of a signal on a channel mixes signals received with an antenna with a local signal having a controllable frequency within a band of frequencies...
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7519344 |
Bandpass amplifier, method, and system
An amplifier has a band pass response. The band pass response may be set by setting corner frequencies of low pass filters.
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7512392 |
System for adaptively filtering a received signal in a wireless receiver
An adaptive band-pass filter for a wireless receiver comprises a band-pass filter associated with the receiver, the band-pass filter configured to selectively filter the received signal, and a...
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7499694 |
Tuner alignment
In a method of tuning a receiver for a digital signal (MPEG2-TS), an input signal (RF-in) is filtered (In-filt, Band-filt) to obtain a processed signal, a digital figure of merit (BER) is...
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7499692 |
Receiving circuit, and receiving apparatus and transmitting/receiving apparatus using the receiving circuit
An object of the invention is to provide a receiving circuit where the quality of reception can be prevented from deteriorating when the gain changes, so that the good quality of the received...
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7477885 |
DC offset cancellation circuits and methods
Embodiments of the present invention include circuits and methods for reducing DC Offset. In one embodiment the present invention includes storing DC offset on internal capacitances. In one...
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7472027 |
Method and apparatus of low power energy detection for a WLAN
A method and implementation disclosed for detecting interference. A state machine controller is provided for establishing an interference detection cycle including a power sample period and a...
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7469137 |
Radio receiver DC offset cancellation via ADC input bias
A scaled input current is produced that substantially matches the full scale input of a CTΔΣADC that substantially cancels an offset bias current component of the input current. A bias resistance...
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7437139 |
Method and apparatus for calibrating filtering of a transceiver
A method and apparatus of calibrating filtering of receive and transmit signals is disclosed. The method of calibrating filtering of a received signal includes injecting an LO signal. The injected...
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7430420 |
Cell selection and inter-frequency handover
The present invention provides a method and an apparatus for controlling a communications system that includes a mobile wireless device, a first and a second base station and a radio network...
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7428262 |
Channel estimation in a rake receiver of a CDMA communication system
A method and apparatus for channel estimation in a rake receiver of a CDMA communication system operates with a finite-impulse-response channel estimation filter with L taps and having a fixed...
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7421262 |
Tuning method and apparatus for reducing interference between adjacent channels
A tuning method comprises: detecting a fundamental intermediate frequency IF 0 of a channel to be received; determining whether the fundamental intermediate frequency IF 0 is affected by an...
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7386306 |
Multi-carrier communications methods and apparatus
Methods and apparatus for implementing a multi-carrier communications system are described. Various approaches to a phased system deployment and system configurations resulting from different...
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7369836 |
Adjacent interference removal device
An adjacent interference removal device capable of providing an improved reception quality. An IF signal Sin having passed through an IF filter having a pass frequency band width of 200 kHz is...
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7369829 |
Signal reception apparatus and method for multi-band ultra-wideband communication systems
A signal reception apparatus and method for communication systems. The signal reception apparatus for communication systems according to the present invention is applicable to communication...
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7359691 |
High frequency interference-cut filter circuit
Disclosed is a high frequency apparatus which eliminates an influence of interfering signals. An interference-cut filter ( 24 ) for eliminating interfering signals is disposed between an input...
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7356314 |
Systems and methods for reusing a low noise amplifier in a wireless communications device
A wireless communication device comprises a plurality of receive signal paths, each of the receive signal paths is configured to receive signals in a certain frequency bandwidth. The communication...
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7336939 |
Integrated tracking filters for direct conversion and low-IF single conversion broadband filters
A radio frequency (RF) tuner includes a programmable tracking filter bank receiving an RF input and outputting a filtered RF signal. A mixer stage receives the filtered RF signal and outputs a...
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7299029 |
Method of operating radio receiver implemented in a single CMOS integrated circuit
A single chip superhetrodyne AM receiver is disclosed herein. To compensate for process variations in the implementation of the IC, bias currents setting the operating conditions for various...
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7292830 |
Receiver gain management
Noise floor searching is performed for a cellular base station to increase accuracy of receiver gain estimates. This allows adjustment of gain in a radio module to account for gain in front-end...
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7280463 |
Digital FM bandwidth control
The bandwidth of a first variable IF filter ( 5 ) for a neighbour channel suppression of a currently received channel, which first variable IF filter ( 5 ) is arranged in a first reception path of...
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7274919 |
Radiofrequency transmitter and/or receiver
The invention provides a simple solution for a broadband transmitter/receiver for which the working bandwidth is split into at least two non-contiguous sub-bands. The invention uses a filtering...
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7269401 |
Signal processing circuit for tuner which applies signal processing based on variation in frequency of intermediate frequency signal
A signal processing circuit for a tuner has a detector band pass filter for extracting a carrier of an intermediate frequency signal, a frequency counter for counting, based on a clock signal, a...
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7251466 |
Television receiver including an integrated band selection filter
A tuner circuit includes a band selection filter coupled to receive an input RF signal and provide a band selected output signal where the band selection filter includes a bank of band pass...
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7231194 |
Localization of narrowband signals
The invention relates to detecting a narrowband signals from received signals. According to the different aspects of the invention, a sample set is first formed from received signals, whereby...
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7231193 |
Direct current offset correction systems and methods
A system and method for direct current offset correction are disclosed. One embodiment of the system includes a direct current offset correction circuitry having an adjustable bandwidth and control...
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7228106 |
Method and apparatus for adjusting usage of DSP of handheld terminal
A method and apparatus for adjusting usage of digital signal processing (DSP) in a handheld terminal receives reception level data and reception quality data from a network, compares the received...
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7209724 |
Method and apparatus for power control in an ultra wideband radio system
A method for power control in an ultra wideband impulse radio system includes: (a) transmitting an impulse radio signal from a first transceiver; (b) receiving the impulse radio signal at a second...
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7183926 |
Adaptable bandwidth RFID tags
RFID tags, tag circuits, and methods adapting the reception bandwidth. A tag has a decoder for decoding a first received wireless signal subject to a reception bandwidth setting. The tag also has a...
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7181184 |
Band edge amplitude reduction system and method
A band edge amplitude reduction system changes the filtering characteristics of a receiver based on the amplitude of signal(s) adjacent to an edge of the operating band of the receiver and/or of...
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7158774 |
Method for tuning a filter
The invention relates to a method for tuning a filter ( 5 ). The filter has at least one variable time constant, by which the location of the pass band (pc) of said at least one filter can be...
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7155193 |
Multi-channel filtering system for transceiver architectures
A multi-channel filtering system for use with a transceiver includes a front-end multi-pole, multi-throw switch, a back-end multi-pole, multi-throw switch, and a plurality of filters. The front-end...
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7149488 |
Direct tuning of radio receiver integrated circuit
A method for direct tuning of a radio receiver begins by providing a plurality of frequency-dependent control input signals to an input of the radio receiver. The method continues by, for each of a...
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7139542 |
Method and apparatus for compensating DC level in an adaptive radio receiver
A radio frequency receiver 30, 32, includes a first component block 12, 16, 18, 20; a second compensating component block 22, 22 a– 22 b , 34 ; and control circuitry 26 operable for...
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7120416 |
Semiconductor device and receiver
A semiconductor device for demodulating a received signal in a satisfactory manner when the frequency of the received signal deviates. The semiconductor device is used in a receiver having a...
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7116958 |
Interference rejection in a radio receiver
The use of wideband or software defined radio is attractive in terms of cost reduction since it allows re-use of base stations for different transmission modes. However, wideband radio also...
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7116957 |
Velocity responsive filtering for pilot signal reception
The velocity of a wireless communications device ( 106 ) is estimated. In response to this estimate, a filter bandwidth, such as a pilot filter ( 310 ) bandwidth, is adjusted so that the...
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7116956 |
Power oscillator for control of waveshape and amplitude
An RF power oscillator for contactless card antennas shapes a carrier signal at the operating frequency utilizing a delay circuit having a number of taps for delaying the carrier signal by...
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7085540 |
Radio telecommunications network, a method of transmitting data in a radio telecommunications network, a receiver, and a method of receiving
A radio telecommunications network comprises a transmitter ( 2 ) and a receiver ( 4 ). The transmitter ( 2 ) is operative to send signals indicative of data, and the receiver ( 4 ) is operative to...
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7072649 |
Multiple purpose antenna system
A multiple purpose antenna system for installation on a highway truck to receive and transmit signals. The system includes an antenna for communication of electromagnetic frequency signals having...
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7065337 |
Tuner for digital terrestrial broadcast signals
A single conversion tuner is provided for receiving digital terrestrial broadcast signals. The tuner comprises a single frequency changer comprising a mixer and local oscillator controlled by a PLL...
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7050406 |
Apparatus, and associated method, for generating assignment information used pursuant to channel allocation in a radio communication system
Apparatus, and an associated method, for facilitating communications in a radio communication system that utilizes shared, packet channels. One or more common control channels are defined upon a...
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7027535 |
Frequency tracking loop and method of frequency tracking
A frequency tracking loop ( 100 ) includes: a mixer ( 122 ) for correcting frequency offset of an input radio signal that includes bursts of known data; a frequency offset estimator ( 134 ), for...
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7006805 |
Aliasing communication system with multi-mode and multi-band functionality and embodiments thereof, such as the family radio service
A receiver having multi-mode and multi-band functionality and capabilities is described herein. The receiver is capable of selectively operating over a plurality of bands and channels. The receiver...
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6999742 |
By-passing adjacent channel interference removal in receivers
A heterodyne receiver includes a tuner to select a frequency of a received signal and a converter to change the frequency of the received signal to an intermediate frequency. A single-pole/double...
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