Harris Corporation

Brian Padalino

John Wesley Nieto

William Nelson Furman

Fred C Kellerman

Brent Josefiak

Michael Andrew Wadsworth

Cory N Fitzsimmons

Mark W Thompson

Nicholas J Stocks

Carl Petruzelli

Robert E Daminski

The digital video communications device includes a scalable video coding (SVC) controller including an encoder and associated block equalizer. The encoder is configured to receive digital video, and encode received digital video into a plurality of related streams including a base layer having a first modulation type, and scaled enhancement layers having different modulation types. The block equalizer is configured to generate a waveform by sequentially interleaving the plurality of related streams with equalizer probes. The digital video transmission approach allows the receiver to automatically provide the best video quality that the channel will support without negotiation with the transmitter.

Systems and methods for multiple stream encoded digital video

A communications device includes a housing, an antenna carried by the housing, an oscillator carried by the housing to generate a reference signal, and an RF receiver carried by the housing, and coupled to the antenna and the oscillator, the RF receiver demodulating a received signal from the antenna based upon the reference signal. The communications device also includes a GPS receiver carried by the housing to generate a calibration signal, a temperature sensor carried by the housing to generate a sensed temperature value, and a processor carried by the housing and coupled to the oscillator, the RF receiver, the GPS receiver, and the temperature sensor. The processor may enter an oscillator calibration mode based upon the sensed temperature value for selectively calibrating the oscillator based upon the calibration signal.

Communications device with oscillator calibration and related methods

A filter for a radio receiving device doubles a sample size of a digital baseband signal to form an enhanced data set and after widowing performs a Fast Fourier Transform (FFT) to facilitate calculation of instantaneous magnitude values and average magnitude values for each of a plurality of frequency bins. A noise floor is calculated based on the average magnitude values of a plurality of the frequency bins, and the noise floor is then used to identify frequency bins which contain an interfering signal. If it is determined that a frequency bin contains spectral energy associated with an interfering signal, then the instantaneous magnitude value of the frequency bin is selectively reduced, after which an inverse FFT operation and inverse window operation is performed.

Method of adaptive interference mitigation in wide band spectrum

A transmitter includes an input, a modulator, and a calibration memory configured to store discrete calibration test points. A compensator is coupled between the input and the modulator and cooperates with the calibration memory to cause the modulator to generate a respective calibration carrier signal for each of the discrete calibration test points during a calibration phase. A detector is coupled to an output of the modulator and is configured to determine respective calibration values of the calibration carrier signals during the calibration phase. A compensator calculator is coupled to an output of the detector, and is configured to generate compensation values for the compensator for use during an operation phase and based on the calibration values of the calibration carrier signals.

Transmitter including calibration of an in-phase/quadrature (I/Q) modulator and associated methods

A communications device includes a radio frequency (RF) receiver being scannable over a plurality of different frequencies and an analog to digital (AD) converter coupled to the RF receiver. The AD converter is configured to generate a receive bitstream. A processor coupled to the RF receiver and the AD converter. The processor is configured to perform, in parallel, calculating a received power level from the receive bitstream, attempting analog video decoding from the receive bitstream, and attempting digital video decoding from the receive bitstream. The processor is also configured to lock the RF receiver to a current frequency or scan the RF receiver to a next frequency based upon the received power level, and the attempted analog and video decoding.

Communications device for scanning multiple frequencies and for detecting analog and digital video signals and associated methods

A communications system receives a modulated signal that carries encoded communications data. An adaptive filter has a plurality of non-adaptive and adaptive filter taps with weighted coefficients and a tap order selection circuit for selecting the number and order of adaptive filter taps based on one of at least measured output power from the adaptive filter and signal modulation. A demodulator and decoder receives the filtered output signal and demodulates and decodes the signal to obtain the communications data.

Communications system using adaptive filter and selected adaptive filter taps

A communications system receives a modulated communication signal that carries encoded communications data. A signal input receives the communication signal. An adaptive filter circuit is connected to the signal input and comprises N number of parallel adaptive filters. Each adaptive filter has non-adaptive and adaptive taps with weighted coefficients that are different in number from the respective other parallel adaptive filters within the adaptive filter circuit. A selection output circuit is connected to each adaptive filter and selects for output the adaptive filter having the most suppression or least output power or other criterion which can indicate a best choice to use of the N parallel adaptive filters. A demodulator demodulates the signal and a decoder receives the filtered output signal from the demodulator and decodes the signal to obtain the communications data.

Communications system using adaptive filter circuit using parallel adaptive filters

A communications system receives a modulated signal that carries encoded communications data. An adaptive filter circuit has a plurality of adaptive filters each having a plurality of non-adaptive and adaptive filter taps with weighted coefficients. At a selected adaptive filter, an interference reduction circuit is responsive to one of at least a received state of a demodulator, the type of modulation used by communication system and the input and output power of adaptive filter for updating the adaptive gain of the adaptive filter, selecting the number and order of adaptive filter taps, separating the spacing of multipath introduced by adaptive filter, controlling input and output normalizing circuits to adaptive filter(s) and selecting if signal passed to demodulator is original received signal or signal output by adaptive filter. A demodulator and decoder receive the filtered output signal and demodulate and decode the signal to obtain the communications data.

Communications system using adaptive filter for interference reduction

A communications system receives a modulated signal that carries encoded communications data. An adaptive filter has a plurality of non-adaptive and adaptive filter taps with weighted coefficients and a input and output normalizing circuit that obtain sample values from a received signal input to or output from the adaptive filter to increase gain recovery based on type of modulation of encoded communication data, on state of demodulator (preamble search, preamble detected, data state) or other signal acquisition information. A demodulator and decoder receive the filtered output signal and demodulate and decode the signal to obtain the communications data.

Communications system using adaptive filter with normalization circuit

A communications system receives a modulated signal that carries encoded communications data. An adaptive filter has a plurality of non-adaptive and adaptive filter taps with weighted coefficients and an adaptive gain circuit for updating the adaptive gain of the adaptive filter responsive to a received state of a modem or the type of modulation used by communications system. A demodulator and decoder receive the filtered output signal from the adaptive filter and demodulate and decode the signal to obtain the communications data.

Communications system using adaptive filter with adaptive update gain

A communications device includes a signal input for receiving both wideband and in-band, narrowband communication signals having wideband communications data that is transmitted over a wideband communications channel and narrowband communications data that is transmitted within an in-band, narrowband channels over the same wideband communications channel. A circuit splits the communications signals into a wideband signal channel and narrowband signal channels. A narrowband filter within the wideband signal channel filters the wideband communications signal and removes any narrowband communications signals. A demodulator within the wideband signal channel demodulates the filtered wideband communications signal to obtain any wideband communications data. An in-band, narrowband demodulators are positioned within the narrowband signal channels and demodulate the narrowband communications signals to obtain any narrowband communications data.

Communications system and device using simultaneous wideband and in-band narrowband operation and related method

A communication system receives a modulated signal that carries encoded communication data. An adaptive filter has a plurality of adaptive filter taps and weighted coefficients and a variable delay circuit operative before the adaptive filter taps for separating the spacing of multipath introduced by adaptive filter and producing a filtered output signal with improved multipath performance. A demodulator and decoder receive the filtered output signal from the adaptive filter and demodulate and decode the signal to obtain the communications data.

Communications system using adaptive filter and variable delay before adaptive filter taps

A communications system receives a modulated signal that carries encoded communications data. An adaptive filter has an input, a plurality of non-adaptive and adaptive filter taps with weighted coefficients, and an output. The received signal is passed through the adaptive filter and around adaptive filter and a switch selects which signal to pass to demodulator based on measured output power of the adaptive filter and of the original received signal. A demodulator and decoder receive the filtered output signal and demodulate and decode the signal to obtain the communications data.

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Rochester, NY, United States of America

Brian Padalino