MARK ALLEN MCHENRY
Pilots at Birnam Wood Dr, Mc Lean, VA
License number
Virginia A1251560
Issued Date
Oct 2016
Expiration Date
Oct 2017
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
8012 Birnam Wood Dr, Mc Lean, VA 22102
Professional information
System And Method For Reuse Of Communications Spectrum For Fixed And Mobile Applications With Efficient Method To Mitigate Interference
US Patent:
RE44237, May 21, 2013
Filed:
Nov 12, 2010
Appl. No.:
12/944796
Inventors:
Mark Allen McHenry - McLean VA, US
Assignee:
Shared Spectrum Company - Vienna VA
International Classification:
H04Q 7/20
US Classification:
455454, 455447, 455450, 4554521, 4554522, 455501, 455 631, 455 6713, 455570, 370324, 375149
Abstract:
A communications system network that enables secondary use of spectrum on a non-interference basis is disclosed. Each secondary transceiver measures the background spectrum. The system uses a modulation method to measure the background signals that eliminates self-generated interference and also identifies the secondary signal to all primary users via on/off amplitude modulation, allowing easy resolution of interference claims. The system uses high-processing gain probe waveforms that enable propagation measurements to be made with minimal interference to the primary users. The system measures background signals and identifies the types of nearby receivers and modifies the local frequency assignments to minimize interference caused by a secondary system due to non-linear mixing interference and interference caused by out-of-band transmitted signals (phase noise, harmonics, and spurs). The system infers a secondary node's elevation and mobility (thus, its probability to cause interference) by analysis of the amplitude of background signals. Elevated or mobile nodes are given more conservative frequency assignments that stationary nodes.
System And Method For Reuse Of Communications Spectrum For Fixed And Mobile Applications With Efficient Method To Mitigate Interference
US Patent:
7146176, Dec 5, 2006
Filed:
Jun 11, 2001
Appl. No.:
09/877087
Inventors:
Mark Allen McHenry - McLean VA, US
Assignee:
Shared Spectrum Company - Vienna VA
International Classification:
H04Q 7/20
US Classification:
455454, 455447, 455450, 4554521, 4554522
Abstract:
A communications system network that enables secondary use of spectrum on a non-interference basis is disclosed. Each secondary transceiver measures the background spectrum. The system uses a modulation method to measure the background signals that eliminates self-generated interference and also identifies the secondary signal to all primary users via on/off amplitude modulation, allowing easy resolution of interference claims. The system uses high-processing gain probe waveforms that enable propagation measurements to be made with minimal interference to the primary users. The system measures background signals and identifies the types of nearby receivers and modifies the local frequency assignments to minimize interference caused by a secondary system due to non-linear mixing interference and interference caused by out-of-band transmitted signals (phase noise, harmonics, and spurs). The system infers a secondary node's elevation and mobility (thus, its probability to cause interference) by analysis of the amplitude of background signals. Elevated or mobile nodes are given more conservative frequency assignments that stationary nodes.
Methods For Detecting And Classifying Signals Transmitted Over A Radio Frequency Spectrum
US Patent:
2013007, Mar 21, 2013
Filed:
Oct 24, 2012
Appl. No.:
13/658968
Inventors:
Eugene Livsics - Vienna VA, US
Mark A. McHenry - McLean VA, US
Dmitry Dain - Herndon VA, US
Karl Steadman - Arlington VA, US
Olga Ritterbush - Arlington VA, US
Mark A. McHenry - McLean VA, US
Dmitry Dain - Herndon VA, US
Karl Steadman - Arlington VA, US
Olga Ritterbush - Arlington VA, US
International Classification:
H04B 17/00
US Classification:
455 6711
Abstract:
A method for classifying a signal is disclosed. The method can be used by a station or stations within a network to classify the signal as non-cooperative (NC) or a target signal. The method performs classification over channels within a frequency spectrum. The percentage of power above a first threshold is computed for a channel. Based on the percentage, a signal is classified as a narrowband signal. If the percentage indicates the absence of a narrowband signal, then a lower second threshold is applied to confirm the absence according to the percentage of power above the second threshold. The signal is classified as a narrowband signal or pre-classified as a wideband signal based on the percentage. Pre-classified wideband signals are classified as a wideband NC signal or target signal using spectrum masks.
System And Method For Reuse Of Communications Spectrum For Fixed And Mobile Applications With Efficient Method To Mitigate Interference
US Patent:
RE44492, Sep 10, 2013
Filed:
Apr 19, 2011
Appl. No.:
13/089492
Inventors:
Mark Allen McHenry - McLean VA, US
Assignee:
Shared Spectrum Company - Vienna VA
International Classification:
H04W 72/00
US Classification:
455454, 455447, 455450, 4554521, 455 6711, 455 6713, 4551151
Abstract:
A communications system network that enables secondary use of spectrum on a non-interference basis is disclosed. Each secondary transceiver measures the background spectrum. The system uses a modulation method to measure the background signals that eliminates self-generated interference and also identifies the secondary signal to all primary users via on/off amplitude modulation, allowing easy resolution of interference claims. The system uses high-processing gain probe waveforms that enable propagation measurements to be made with minimal interference to the primary users. The system measures background signals and identifies the types of nearby receivers and modifies the local frequency assignments to minimize interference caused by a secondary system due to non-linear mixing interference and interference caused by out-of-band transmitted signals (phase noise, harmonics, and spurs). The system infers a secondary node's elevation and mobility (thus, its probability to cause interference) by analysis of the amplitude of background signals. Elevated or mobile nodes are given more conservative frequency assignments that stationary nodes.
Method And System For Determining Spectrum Availability Within A Network
US Patent:
8064840, Nov 22, 2011
Filed:
Jun 18, 2009
Appl. No.:
12/487257
Inventors:
Mark Allen McHenry - McLean VA, US
Alexe E. Leu - Arlington VA, US
Alexe E. Leu - Arlington VA, US
Assignee:
Shared Spectrum Company - Vienna VA
International Classification:
H04B 17/00
US Classification:
455 6716
Abstract:
A method and transceiver for determining spectrum availability within a give area is disclosed. The given area includes cells in a grid. A belief evaluator receives a measurement from a signal and assigns an instantaneous belief indicator, an instantaneous disbelief indicator and an instantaneous ignorance indicator based on a detection threshold and the power level of the measurement. The indicators quantify the probability of a presence of a transmitter within the grid cell. A belief accumulator uses the instantaneous indicators along with accumulated belief, disbelief and ignorance indicators from previous measurements to determine cumulative belief, disbelief and ignorance indicators. The accumulated belief, disbelief and ignorance indicators are the results of previous measurements and belief/disbelief/ignorance determinations for the grid cell. An allocator indicates the status of the grid cell and whether a spectrum is available. If a spectrum is available, then the grid cell is added to other available cells within the area to generate the spectrum hole.
Method And System For Transmitting Signals With Reduced Spurious Emissions
US Patent:
2012020, Aug 9, 2012
Filed:
Apr 20, 2012
Appl. No.:
13/451839
Inventors:
Mark Allen McHenry - McLean VA, US
Assignee:
SHARED SPECTRUM COMPANY - VIENNA VA
International Classification:
H04L 25/49
US Classification:
375297
Abstract:
An RF power amplifier architecture minimizes spurious emissions by breaking the transmitted signal into narrow spectrum sub-bands, amplifying each separately, and then combining the signals for transmission purposes.
Method And System For Transmitting Signals With Reduced Spurious Emissions
US Patent:
8184678, May 22, 2012
Filed:
Jul 11, 2008
Appl. No.:
12/171450
Inventors:
Mark Allen McHenry - McLean VA, US
Assignee:
Shared Spectrum Company - Vienna VA
International Classification:
H04B 1/38, H04L 25/03, H04L 27/26
US Classification:
375219, 375295, 375297
Abstract:
An RF power amplifier architecture minimizes spurious emissions by breaking the transmitted signal into narrow spectrum sub-bands, amplifying each separately, and then combining the signals for transmission purposes.
Method And System For Man-Made Noise Rejection Detector
US Patent:
2012030, Nov 29, 2012
Filed:
May 25, 2012
Appl. No.:
13/481278
Inventors:
Mark Allen McHenry - McLean VA, US
Assignee:
Shared Spectrum Company - Vienna VA
International Classification:
H04B 17/00
US Classification:
4552263
Abstract:
Methods and systems for dynamic spectrum access (DSA) in a wireless network are provided. A DSA-enabled device may sense spectrum use in a region and, based on the detected spectrum use, select one or more communication channels for use. The devices also may detect one or more other DSA-enabled devices with which they can form DSA networks. A DSA network may monitor spectrum use by cooperative and non-cooperative devices, to dynamically select one or more channels to use for communication while avoiding or reducing interference with other devices. A man-made noise rejection sub-system is used to permit signal detection while maintaining a low false alarm rate.
Method And System For Dynamic Spectrum Access Using Detection Periods
US Patent:
8326313, Dec 4, 2012
Filed:
Aug 14, 2009
Appl. No.:
12/541621
Inventors:
Mark Allen McHenry - McLean VA, US
Igor Anatoly Bazarov - Herndon VA, US
Dmitry Dain - Herndon VA, US
Jevgenijs Livsics - Reston VA, US
Filip Perich - Annapolis MD, US
Olga K. Ritterbush - Arlington VA, US
Karl N. Steadman - Arlington VA, US
Igor Anatoly Bazarov - Herndon VA, US
Dmitry Dain - Herndon VA, US
Jevgenijs Livsics - Reston VA, US
Filip Perich - Annapolis MD, US
Olga K. Ritterbush - Arlington VA, US
Karl N. Steadman - Arlington VA, US
Assignee:
Shared Spectrum Company - Vienna VA
International Classification:
H04W 72/00
US Classification:
455454, 455 62, 455 6711, 455 6716, 455434, 455450, 370277, 370329, 370330, 370335
Abstract:
Methods and systems for dynamic spectrum access (DSA) in a wireless network are provided. A DSA-enabled device may sense spectrum use in a region and, based on the detected spectrum use, select one or more communication channels for use. The devices also may detect one or more other DSA-enabled devices with which they can form DSA networks. A DSA network may monitor spectrum use by cooperative and non-cooperative devices, to dynamically select one or more channels to use for communication while avoiding or reducing interference with other devices.
Systems And Methods For A Cognitive Radio Having Adaptable Characteristics
US Patent:
2013002, Jan 31, 2013
Filed:
May 2, 2012
Appl. No.:
13/462302
Inventors:
Dmitry DAIN - Herndon VA, US
Igor BAZAROV - Herndon VA, US
Jevgenijs LIVSICS - Vienna VA, US
Mark A. MCHENRY - McLean VA, US
Igor BAZAROV - Herndon VA, US
Jevgenijs LIVSICS - Vienna VA, US
Mark A. MCHENRY - McLean VA, US
Assignee:
SHARED SPECTRUM COMPANY - VIENNA VA
International Classification:
H04W 24/00
US Classification:
370252
Abstract:
Systems and methods for configuring a network of radios for dynamic spectrum access are described. A network radio can include hardware and/or software modules for detecting a radio environment and negotiating common communications channels with a plurality of other radios in the network. Network radio behavior can be defined by a plurality of predefined policies which are used in combination with the information about the radio environment to select common operating parameters.