| Patent Number |
Title Of Patent |
Date Issued |
| 7555064 |
System and method for estimating noise power level in a multi-signal communications channel |
June 30, 2009 |
| A system estimates noise power in a scalar, multi-signal communications channel. A data sampler collects N data samples from communications signals received from the communications channel. A module forms a covariance matrix of the N data samples based on a model order estimate. A mo |
| 7499515 |
System and method for automated link quality measurement for adaptive modulation systems using n |
March 3, 2009 |
| A communications system includes a transmitter that transmits a modulated signal having encoded communications data over a communications channel. The transmitter adjusts one of at least modulation and coding at the transmitter based on the received channel state information of the t |
| 7447276 |
Receiver and method for blind adaptive thresholding using noise estimator |
November 4, 2008 |
| A receiver estimates noise power and establishes a false alarm detector threshold. The receiver includes an antenna array having a plurality of antenna subarrays on which multiple communications signals are received over a communications channel. At least one channelizer splits the c |
| 7415082 |
Receiver including synch pulse detection and associated method |
August 19, 2008 |
| A receiver includes a matched filter matched to a synch pulse and generates a matched filter output signal having peaks and valleys with one of the peaks corresponding to the synch pulse. An orthogonal filter is inversely matched to the synch pulse and generates an orthogonal filter |
| 7205859 |
Method and apparatus for sub sample-per-symbol demodulator for a spectrally efficient waveform w |
April 17, 2007 |
| An apparatus and method for transmitting and receiving a communication signal includes selecting a pulse shape for a continuous phase modulated waveform, encoding specific information into the waveform to form a communication signal and transmitting the communication signal. The syst |
| 7187326 |
System and method for cumulant-based geolocation of cooperative and non-cooperative RF transmitt |
March 6, 2007 |
| A transmitted signal's higher order statistics of temporally dependent waveforms are exploited to geolocate low power signals. The geolocation is independent of the characteristics or encoded data of the transmitted waveform. The method uses spatial fourth order cumulants or spatial |
| 7126946 |
Dual key controlled content addressable memory for accessing packet switch data buffer for multi |
October 24, 2006 |
| A data management architecture for a high speed packet switch has a dual key-based content addressable memory (CAM)-based buffer access control mechanism that stores relatively long data packets for delivery to multiple output ports of the switch. The CAM stores multiple address poin |
| 7076001 |
System and method for an in-service decision-directed signal to noise ratio estimator |
July 11, 2006 |
| A signal to noise ratio estimator and method for a received signal which includes a communication component and a noise component is disclosed. One embodiment is an in-service, blind, decision-directed estimator for a CPFSK communication signal. A preferred embodiment determines the powe |
| 6993460 |
Method and system for tracking eigenvalues of matrix pencils for signal enumeration |
January 31, 2006 |
| Embodiments of a system and method are disclosed that exploit the unique higher order statistics of temporally dependent waveforms to detect and enumerate signals in a multi-signal and noise environment. The embodiments use spatial 4.sup.th-order cumulants or spatial 2.sup.nd-order m |
| 6993440 |
System and method for waveform classification and characterization using multidimensional higher |
January 31, 2006 |
| A receiver exploits unique higher order statistics of temporally dependent waveforms to classify, characterize, identify (fingerprint) and intercept a waveform within the field of view of the receiver. The method uses 4.sup.th-order non zero lag auto cumulants of the received waveform an |
| 6919839 |
Synthetic aperture radar (SAR) compensating for ionospheric distortion based upon measurement of |
July 19, 2005 |
| A synthetic aperture radar (SAR) compensates for ionospheric distortions based upon measurement of the group delay, particularly when operating in the VHF/UHF band. The SAR is based upon a multi-input multi-output (MIMO) technique for estimating the effective ionospheric conditions, whic |
| 6914553 |
Synthetic aperture radar (SAR) compensating for ionospheric distortion based upon measurement of |
July 5, 2005 |
| A synthetic aperture radar (SAR) for a moveable platform includes an antenna, a radar transmitter and radar receiver cooperating with the antenna. A radar processor is connected to the radar transmitter and radar receiver to account for the Faraday rotation introduced by propagation |
| 6711528 |
Blind source separation utilizing a spatial fourth order cumulant matrix pencil |
March 23, 2004 |
| Blind source separation (BSS) of statistically independent signals with low signal-to-noise plus interference ratios under a narrowband assumption utilizes cumulants in conjunction with spectral estimation of the signal subspace to perform the blind separation. The BSS technique utilizes |
| 6606317 |
Dual key controlled content addressable memory for accessing packet switch data buffer for multi |
August 12, 2003 |
| An output port centric digital data management architecture for a high speed packet switch employs a dual key-based content addressable memory (CAM)-based buffer access control mechanism for efficient storage and read out of relatively long data packets to one or more output ports of the |
| 6271953 |
Method and system for optical free space communications using non-mechanical beam steering |
August 7, 2001 |
| A method and system of communicating in free space comprises a first communication terminal having a multiplexer circuit for multiplexing a plurality of analog communication signals into a single broad band frequency division multiplexed signal. A laser generates an optical carrier s |
| 6259544 |
Beam steering device used in system and method for free space optical communications |
July 10, 2001 |
| A method and system of communicating in free space using an optical communication system, such as for intersatellite and satellite-to-ground communications, is disclosed. Digital communication signals are multiplexed with a plurality of other analog communication signals into a singl |
| 6246498 |
System and method for free space optical communications using time division multiplexing of digi |
June 12, 2001 |
| A method and system of communicating in free space using an optical communication system, such as for intersatellite and satellite-to-ground communications, is disclosed. Digital communication signals are multiplexed with a plurality of other analog communication signals into a singl |
| 6222658 |
Method and apparatus for a free space optical non-processing satellite transponder |
April 24, 2001 |
| A method and apparatus for a free space optical non-processing satellite transponder includes the step of receiving a phase modulated optical communication signal in a satellite. This phase modulated optical communication signal has been formed by phase modulating an optical carrier |
| 6208544 |
Content addressable memory cell providing simultaneous read and compare capability |
March 27, 2001 |
| The need to employ three separate cycles for write, read and compare operations for operation of a content addressable memory cell is obviated by a memory cell architecture that allows simultaneous read and compare operations, thereby reducing memory cycle time by one-third of that of a |
| 6181450 |
System and method for free space optical communications |
January 30, 2001 |
| A method and system of communicating in free space using an optical communication system, such as for intersatellite and satellite-to-ground communications, is disclosed. Digital communication signals are multiplexed with a plurality of other analog communication signals into a singl |
