|
Match
|
Document |
Document Title |
|
|
7248653 |
Low power and high linearity receivers with reactively biased front ends
A radio frequency receiver includes an amplifier and a detector that produces a bias control signal based on a signal environment. A bias level of the amplifier is set according to the bias control...
|
|
|
7236750 |
Techniques for correcting for phase and amplitude offsets in a MIMO radio device
Techniques to correct for phase and amplitude mismatches in a radio device in order to maintain channel symmetry when communicating with another device using MIMO radio communication techniques....
|
|
|
7228120 |
Circuit and method for reducing direct current biases
A method is provided for reducing a DC bias in a receiver. This method includes isolating a second circuit portion from a first circuit portion ( 535 ) and determining a second DC bias correction...
|
|
|
7218687 |
Receiver with baseline wander correction and correction method thereof
A receiver with baseline wander correction for correcting a received input signal. The receiver includes first and second biasing resistor networks configured to receive first and a second signal...
|
|
|
7218686 |
Decision threshold voltage control circuit and decision threshold voltage controlling method of clock and data recovery circuit, optical receiver, and decision threshold voltage control program
According to a decision threshold voltage controlling method of feeding an optimum decision threshold voltage to a clock and data recovery circuit which converts an optical input signal into an...
|
|
|
7218688 |
Data slicer
Data of the packet header is digitalized by a slicer circuit of a floating slice level mode, which follows DC voltage fluctuation, and packet data other than the packet header is digitalized by a...
|
|
|
7215721 |
Method and system for decoding multilevel signals
A multilevel optical receiver can comprise a plurality of comparators that generally correspond with the number of levels in a multilevel data stream. Each comparator can be individually controlled...
|
|
|
7215720 |
Method for compensating baseline wander of a transmission signal and related circuit
A method for compensating a baseline wander of a transmission signal and related circuit are provided. The transmission signal includes a plurality of first pulses and a plurality of second pulses...
|
|
|
7212580 |
Multi-level signal clock recovery technique
Clock recovery of a multi-level (ML) signal can be performed in a two-step process. First, the transitions within the ML signal can be detected by a novel transition detector (TD). And second, the...
|
|
|
7212749 |
Signal receiver having wide band amplification capability
An Improved Signal Receiver Having Wide Band Amplification Capability is disclosed. Also disclosed is a receiver that is able to receive and reliably amplify infrared and/or other wireless signals...
|
|
|
7206360 |
Amplitude deviation correction circuit
A novel amplitude deviation correction circuit which corrects an amplitude deviation between an I signal and a Q signal is disclosed. An average amplitude deviation between an I signal amplified by...
|
|
|
7197090 |
Adaptive decision regions and metrics
An improved decoding technique useful for hard decision decoding, such as quadrature phase shift keying (PSK) and quadrature amplitude modulation (QAM), as well as soft-decision techniques, such as...
|
|
|
7194018 |
Apparatus for searching multipath in spread spectrum communications system and method thereof
A multipath searching device includes a radio front-end for converting a received radio signal into a baseband signal and for outputting the baseband signal. A profile calculating unit is included...
|
|
|
7177373 |
Continuous self-calibration of internal analog signals
A method and apparatus for monitoring and adjusting an analog signal of an operating circuit. The apparatus includes a control circuit, an analog-to-digital converter, and a comparator. The control...
|
|
|
7158482 |
Method and apparatus for preventing received data from corrupting previously processed data in a wireless communications system
A communication system includes a forward link from a base station to multiple mobile units, the forward link having multiple shared channels (SHCH's), multiple shared control channels (SHCCH's),...
|
|
|
7155134 |
Pulse amplitude modulated transmission scheme for optical channels with soft decision decoding
An amplitude modulated optical communication system and method are disclosed that achieve bandwidth compression by making use of an n level amplitude modulation scheme in one or more frequency...
|
|
|
7099395 |
Reducing coupled noise in pseudo-differential signaling systems
A pseudo-differential signaling system uses a plurality of signal lines and a single, common reference voltage. Signal line voltages are interpreted only in comparison to the reference line...
|
|
|
7092435 |
Line quality monitoring apparatus and method
In a line quality monitoring method of detecting a code error rate by identifying a received optical signal using different identification levels and executing bit comparison after identification,...
|
|
|
7076003 |
Constellation design for modem receiver
A method of forming a constellation design, and a receiver having both a processor that generates the constellation design and having a comparator. The particular constellation design described...
|
|
|
7072618 |
Adaptive threshold selection system and method for detection of a signal in the presence of interference
A system and method for providing adaptive threshold selection for detecting a signal in the presence of interference or noise. The system and method thus enables a node, such as a mobile user...
|
|
|
7061542 |
Television receiving method and television receiver
A receiving section for digital television broadcasting and a receiving section for analog television broadcasting are provided. When a digital television broadcasting program is selected, it is...
|
|
|
7061995 |
Apparatus and method to generate an adaptive slicer threshold for binary data
An adaptive slicer threshold generation system includes a first moving average filter to determine a first average value of a first binary signal. A second moving average filter is included to...
|
|
|
7054387 |
Feed-forward/feedback system and method for non-causal channel equalization
A system and method are provided for feed-forward/feedback non-causal channel equalization in a communications system. The method comprises: receiving a non-return to zero (NRZ) data stream input;...
|
|
|
7054395 |
Automatic gain control for digital demodulation apparatus
A digital demodulation apparatus automatically controls gain based on a state of receiving a digital modulated signal. The digital demodulation apparatus amplifies a digital modulated signal wave...
|
|
|
7046742 |
System and method for temporal analysis of serial data
A system and method are provided for temporally analyzing serial input data. The method comprises: establishing three thresholds; distinguishing present (first) high probability one bit value...
|
|
|
7043203 |
Process for re-transmitting single frequency signals and a single frequency signal repeater
The invention discloses a process for re-transmitting single frequency signals and a single frequency signal repeater, where coupling occurs between the transmitting antenna and the receiving...
|
|
|
7042961 |
Full rate error detection circuit for use with external circuitry
A system and method are provided for selecting an optimal threshold detection level for a single serial data input receiver. The method comprises: receiving a serial data stream of pseudorandom...
|
|
|
7035349 |
Signal compensation circuit and demodulating circuit with high-speed and low-speed feedback loops
A signal compensation circuit compensates for direct-current offset of an input signal by amplifying the input signal with an amplifier having a variable direct-current offset. A low-speed negative...
|
|
|
7003057 |
Reception AGC circuit
A reception AGC circuit includes a high-speed power calculating circuit for calculating the power of an input signal at a short period, a normal power calculating circuit for calculating the power...
|
|
|
6993100 |
Burst detector
A system for detecting a burst in a wireless communications system. A signal strength indicator indicates the strength of an incoming signal representative of incoming packets. A signal strength...
|
|
|
6977970 |
Data reproducing apparatus and method for improving detection performance by adjusting decision levels used in data detector
A data reproducing apparatus and method for improving data detection performance by adjusting decision levels used in a data detector. The data reproducing apparatus includes an equalizer which...
|
|
|
6977971 |
Digital data transmission system with device for correcting baseline wander
There is provided a digital data transmission system that includes a first unit transmitting a first MLT3 signal, a second unit receiving the first MLT3 signal, and transformers. The second unit...
|
|
|
6961390 |
Systems and methods for non-casual channel equalization in an asymmetrical noise environment
A system and method are provided for non-causal channel equalization in a communications system. The method comprises: receiving a non-return to zero (NRZ) data stream input; establishing...
|
|
|
6956905 |
Peak detector circuit
A balanced peak detector circuit adjusts differential voltage signals. In one embodiment, the peak detector uses competing current paths to provide a charging current to a storage capacitor. The...
|
|
|
6947495 |
Method for estimating and removing a time-varying DC-offset
A method for estimating and removing a time varying DC-offset includes the steps of dividing the received burst into blocks ( 902 ), then finding the maximum and minimum values in each block ( 904...
|
|
|
6947496 |
Method for refining a DC-offset estimate and removing the DC-offset
A method for refining a DC-Offset estimate and removing of the DC-Offset includes the step of determining if any AM is present ( 602 ). If AM is determined to be present, it is next determined if...
|
|
|
6928249 |
Fiber optic receiver with an adjustable response preamplifier
A fiber optic receiver that includes an opto-electronic transducer, an adjustable response preamplifier circuit, and a post-amplifier circuit is described. The opto-electronic transducer is...
|
|
|
6925170 |
Wire-bound telecommunication device and a circuit for use in such a device
In known telephone subscriber end stations a caller_ID IC detects a tone alerting signal TAS alerting that successive caller_ID information can be received for displaying on a display of the phone....
|
|
|
6915076 |
System and method for adaptively selecting a signal threshold of an optical link
An apparatus and method for detecting a signal in an optical data network is disclosed. A peak power level and an average power level are measured for an optical input to an optical detector. A...
|
|
|
6898253 |
Method and apparatus for an accurate slicer that can rapidly adjust to an offset
A method that calculates a threshold for a signal according to a first bandwidth if the signal is greater than the threshold plus a first value or if the signal is less than the threshold minus the...
|
|
|
6879644 |
Method and apparatus for automatically determining a peak voltage level for a data signal propagated on a carrier medium
A method of automatically determining a peak level of a signal propagated on a carrier medium, such as for example POTS wiring, includes detecting a traversal of a noise threshold level by a data...
|
|
|
6879645 |
Method and apparatus for dynamically varying the noise sensitivity of a receiver
A method of dynamically, and automatically, varying the sensitivity of a receiver coupled to receive signals on a carrier medium, such as for example POTS wiring, includes the step of detecting...
|
|
|
6871304 |
Method and apparatus for adjusting receiver voltage threshold and phase sampling point using FEC counts
Methods and apparatus are provided for adjusting slicing parameters, such as a voltage threshold and a phase sampling point, used in recovering 1's and 0's from a signal so as to reduce a bit error...
|
|
|
6842489 |
Coherent adaptive calibration system and method
A receiver is adaptively calibrated by using a coherent reference signal. The reference signal is selected to be offset from a center frequency of the calibration signal such that the resultant...
|
|
|
6833743 |
Adjustment of a clock duty cycle
Circuits for adjusting the duty cycle of a clock(s) signal include a negative feedback loop for applying an offset signal to the uncorrected clock signal(s). The offset signal, which corresponds to...
|
|
|
6823024 |
Compensation circuit and method for compensating for an offset
To demodulate a frequency-modulated signal having an offset, two time constants are provided in a filter unit. The filter unit has two analog or digital low-pass filters or high-pass filters. A...
|
|
|
6819880 |
Loss of signal detection circuit for light receiver
An increase in the code error rate in a received signal is detected in a light receiver. An loss of signal detector circuit for a light receiver 20 comprises a main discrimination circuit 8 a ...
|
|
|
6798832 |
Semiconductor device with decision feedback equalizer
A semiconductor circuit includes a decision feedback equalizer (DFE) for waveform-equalizing an input signal and generating a waveform-equalized input signal. The DFE compares the...
|
|
|
6785344 |
Fast threshold determination for packet-multiplexed digital communication
The present invention includes a system that determines a threshold to distinguish between binary signals. The system includes a bit wise threshold determination device coupled to receive an input...
|
|
|
6771712 |
System for extracting a clock signal and a digital data signal from a modulated carrier signal in a receiver
A transmitter circuit for transmitting a sine wave modulated with digital data, where the sine wave includes a clock signal, and a receiver circuit for demodulating the transmitted sine wave, where...
|