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7643547 |
Radio quality estimation system, base station, mobile station, and radio quality estimation method
An object of the present invention is to provide a radio quality estimation system, a base station, a mobile station, and a radio quality estimation method whereby, regardless of influence of...
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7639735 |
Method and apparatus for signal to noise ratio estimation
A method and apparatus for generating a signal to noise ratio (SNR) estimate. A conditional probability distribution function (CPDF) is rectified to suppress the condition, thereby creating a...
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7636051 |
Status monitor apparatus
A statistical value update unit calculates the fluctuation of measurement data. A filtering processing unit extracts a normal white noise component from the fluctuation of the measurement data...
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7634000 |
Noise estimator for a communications system
A SINR estimator receiving a symbol stream has a delay element coupled to the symbol stream to produce a delayed symbol stream, which is also coupled to a conjugator. A first multiplier forms a...
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7623569 |
Apparatus and method for estimating interference and noise in a communication system
A method and apparatus for estimating interference and noise power in an orthogonal frequency division multiplexing/orthogonal frequency division multiple access/discrete multi-tone...
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7616927 |
Method and apparatus to reduce multipath effects on radio link control measurements
One or more median filter circuits are used to filter radio link control measurements corresponding to one or more radio link parameters of interest, such as received signal quality or round trip...
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7606299 |
Apparatus and method for estimating a carrier-to-interference-and-noise ratio in a communication system
In an apparatus for estimating a Carrier-to-Interference-and-Noise Ratio (CINR) in a communication system, received signals are blocked based on sub-carriers with similar channel characteristics....
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7600178 |
Methods for the determination of FEC parameters in DMT based xDSL systems in the presence of system imposed constraints
The present invention provides procedures for computing Forward Error Correction (FEC) parameters given a set of constraints on maximum interleaver memory, maximum interleaver depth, maximum...
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7596461 |
Measurement of air quality in wireless networks
A system for measuring air quality in wireless networks. In particular implementations, a method includes computing an interference severity level for a plurality of interference sources detected...
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7593459 |
Wireless link simulator
A wireless link simulator includes, in sequence, a digital transmit device under test (TX-DUT), a wireless link simulator, and a digital receive device under test (RX-DUT). The wireless link...
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7593315 |
Cable diagnostics for 10GBASE-T transceivers
A 10GBASE-T transceiver that is capable of performing cable diagnostics. The transceiver is a physical layer device (PHY) that has four transceiver sections. Each section includes an input path and...
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7590171 |
Apparatus and method for estimating a carrier-to-interference-and-noise ratio in a communication system
An apparatus and method are provided for estimating a Carrier-to-Interference-and-Noise Ratio (CINR) in a communication system based on Orthogonal Frequency Division Multiplexing (OFDM) or...
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7590172 |
Low bias estimation of small signal-to-noise ratio
A user equipment includes an estimator. The estimator is configured to select a first estimate of a signal-to-noise (SNR) ratio, calculate a first amplitude and first noise variance, calculate a...
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7586996 |
Method for controlling the power of the output signal from an amplifier system and the associated system
Filtered digital information representative of the power of an output signal from an amplifier is generated, and control information from a setpoint representative of a desired power for the output...
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7583739 |
Channel estimation device, channel estimation method, and wireless receiver
A channel estimation device is provided to achieve high-precision channel estimation in a MIMO or multicarrier wireless receiver. This channel estimation device is used in the wireless receiver...
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7577203 |
Minimizing non-deterministic noise by using wavelet transform
A wavelet transform noise minimization circuit comprises a differential receiver, a voltage comparator, a wavelet transform circuit, an electrical idle (EI) detector circuit, a phase interpolator,...
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7577227 |
Link adaption in general packet radio service networks
In one embodiment of the method of adaptively selecting an airlink coding scheme in a telecommunications network, a coding scheme operating region is determined based on a currently used coding...
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7567614 |
Altering power consumption in communication links based on measured noise
A method, circuit and system for altering the power consumption in communication links. A type of noise and an amount of jitter in a signal transmitted across a communication link is measured. Upon...
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7567613 |
Test method and apparatus for in-house wiring problems
To test for in-house wiring problems, upstream transmission profiles are tuned automatically and remotely, and reactive downstream parameter modifications indicative for in-house wiring problems...
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7564898 |
System and method for selecting data rates of data signals
A transceiver comprises a communication line interface, memory, and logic. The memory stores predefined noise spectra, and the logic is configured to analyze an initialization signal received from...
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7564895 |
Method and apparatus for monitoring channel frequency response
Method and apparatus for retrieving the channel frequency response H(f), the noise N(f), measured at initialization and the signal to noise ratio SNR(f) measured at show time on a per bin basis, in...
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7561212 |
Digital broadcast receiving apparatus and receiving method
A factor in deterioration of receiving characteristics of an antenna is automatically determined and automatically improved. In an apparatus for receiving digital broadcast signal, when receiving...
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7551690 |
Transmitter and receiver
A transmitter ( 1 ) converts an input signal from a microphone ( 2 ) into a plural-bit digital signal by means of an A/D converter ( 4 ) at predetermined time intervals. An encoder ( 6 ) divides...
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7532685 |
Methods of controlling tracker bandwidth in wireless communication systems
A method of tracking on-time errors may include producing first and second metrics from accumulated signal samples of a received data frame, and calculating a sum of, and a difference between, the...
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7519342 |
Tunable tracking filter
An integrated tuner circuit has an arbitrary IF (intermediate frequency) output. The tuner includes an integrated circuit with a fixed-frequency control loop and a matched external variable...
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7519329 |
Determination of antenna noise temperature for handheld wireless devices
Antenna noise temperature is determined for a handheld wireless communication device which typically includes a radio, e.g. having a wireless transceiver and associated circuitry connected thereto,...
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7519113 |
Noise detection device
Noise detection is performed by using the output of the phase comparator that the PLL comprises. The phase comparator outputs a signal that is based on the phase difference between the output of...
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7508869 |
Apparatus method and system for characterizing a communication channel and increasing data throughput
In contrast to prior are solutions that conduct an averaging operation to estimate metrics related to a communications channel such as a signal-to-noise ratio, the present invention selects a...
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7499486 |
Data transmission rate adaptation in a wireless communication system
In a wireless system comprising at least one transceiver configurable for communication over a wireless communication channel, the transceiver comprising a transmitter and a receiver, a method for...
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7499506 |
Detection of signal modulation format type
A biasing algorithm, apparatus and method for detecting and modulation format of a received signal used in a mobile phone system implementing EDGE technology that transmits and receives both GMSK...
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7492814 |
Method of removing noise and interference from signal using peak picking
Removing noise and interference from a signal by calculating a joint time-frequency domain of the signal, estimating instantaneous frequencies of the joint time-frequency domain, modifying each...
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7486724 |
Codec compensation techniques for channel analysis applications
Methods and apparatus to perform and/or analyze communication channels are described. In one embodiment, a test signal may be generated and transferred using a first signal route to a...
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7483501 |
System and method for radio receiver RF background noise estimation
A system and method of estimating radio frequency (RF) background noise in a radio receiver system comprises determining a total receiver front-end noise based on a noise equivalent receiver...
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7466749 |
Rate selection with margin sharing
Rate selection with margin sharing in a system with independent data stream rates is presented. Signal-to-Noise Ratio (SNR) estimates are obtained for each stream. Rates are selected for the...
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7463677 |
Link adaptation in wireless networks for throughput maximization under retransmissions
The present invention implements a method and system for dynamically adapting the modulation and coding scheme for radio links in a wireless communications network based on a retransmission...
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7460619 |
Method and system for optimizing coding gain
A method and system for optimizing coding gain that alters the backsearch buffer length and/or the input buffer length of a decoder in response to one or more transmission performance...
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7460591 |
Method and apparatus using re-sampled tie records to characterize jitter in a digital signal
Measurement of jitter in a system uses a digital test sequence including many repetitions of a test pattern. An Acquisition Record is made of the entire test sequence. A complete Time Interval...
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7460967 |
Selectable navigation to automatically discovered events within the acquisition record of a digital sampling oscilloscope
Events discovered by an automatic measurement subsystem in the trace of a DSO are visited using a set of event navigation controls. In a TIME Mode the controls operate to display the first of those...
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7453934 |
Automatic receiver calibration with noise and fast fourier transform
The present invention provides a method for automatic calibration of a signal path in receivers (e.g., radio frequency receivers) using a noise (and not a specific test signal) as a source and a...
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7453963 |
Subtractive cancellation of harmonic noise
A common problem in audio processing is that a useful signal is disturbed by one or more sinusoidal noises that should be suppressed. One embodiment of the invention provides a method of canceling...
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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...
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7430237 |
Decoderless bit-error-rate estimation for convolutionally encoded transmissions in wireless systems
In a UMTS (universal mobile telecommunications system) based system, a wireless receiver implements “effective signal-to-noise (E b /N o ) based BER estimation.” In particular, the wireless...
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7421009 |
Noise power estimation apparatus, noise power estimation method and signal detection apparatus
A noise power estimation apparatus is disclosed. The noise power estimation apparatus includes: a part for calculating correlation between a received signal and a pilot signal so as to obtain a...
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7414581 |
Method for improved signal to noise ratio estimation
A method for estimating signal/noise ratio is provided. The method comprises calculating a first signal/noise ratio (SNR) estimate using a technique with a first response time, calculating a second...
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7415063 |
Method to estimate noise in data
A method for estimating uncorrelated noise in a distributed record of data including data samples that represent both signal and noise, provided that the signal is substantially in phase between...
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7397871 |
Estimation of single-to-noise ratio by processing measured error vector magnitude
The signal-to-noise ratio of a demodulated received signal is estimated by measuring the error vector magnitude (EVM) of the demodulated signal; and processing the measured EVM in combination with...
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7388919 |
Dynamic wireless link adaptation
A system that adapts wireless link parameters for a wireless communication link. A measure is determined of errors occurring in communication over a wireless link. In a case that the measure of...
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7386043 |
Method and apparatus for increasing spectral efficiency using mitigated transmit power near band-edge
A method and apparatus for increasing the spectral efficiency of communications systems by employing portions of the spectrum, which portions might otherwise be reserved as all or part of guard...
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7376207 |
Apparatus for receiving and recovering frequency shift keyed symbols
A receiver architecture for receiving an FSK signal having a predetermined number of modulation levels includes a selectivity filter ( 206 ) for selectively passing a wanted channel and rejecting...
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7376178 |
Low bias estimation of small signal-to-noise ratio
An apparatus and method for estimation of signal-to-noise ratio (SNR) with low bias that is effective for both positive SNRs and small to negative SNRs. The estimation is based on an iterative...
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