Patents by Inventor Michael A. Mayor
Michael A. Mayor has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8675482Abstract: Enhanced reception in a communication system is achieved by synchronously combining transmissions from a cluster of transmitting communication devices at a group of distant receiving communication devices. The transmitting communication devices coordinate their transmissions such that each device transmits the same signal on the same communication channel at different transmission times. As a consequence of the spatial diversity of the transmitting and receiving communication devices and the temporal diversity of the transmission times, the transmitted signals arrive at the receiving communication devices at different times. The receiving communication devices each essentially treat the different transmitted signals as though they were different multipath signals from a single transmitting communication device. This permits detection at a greater range or with a lower bit error rate.Type: GrantFiled: August 5, 2009Date of Patent: March 18, 2014Assignee: Exelis Inc.Inventors: Ning Lu, Michael Mayor
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Patent number: 7292624Abstract: A Direct Sequence Spread Spectrum receiver is described in which a complex spread spectrum signal is cross correlated by four digitally matched filters. The filters and subsequent multipliers correlate the in-phase and quadrature components as well as the current and previous symbols. The result is a more robust signal acquisition at very low signal to noise ratios.Type: GrantFiled: August 27, 2002Date of Patent: November 6, 2007Assignee: ITT Manufacturing, Inc.Inventors: Michael A. Mayor, Lester G. Matheson, Robert D. Martin, John H. Gass, Mhairi N. McCune
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Publication number: 20070162150Abstract: The invention is generally directed to the novel and unique modular implant that provides an improved surface for interfacing with an external prosthesis. The implant includes a stem, an optional extension member connected to the stem, a prosthetic condyle, or in the case of application to other levels of cut bone amputations, a location-specific terminal shape, connected to the extension member. The stem is inserted directly into the canal of the bone and tissue, including muscle, is attached directly to the prosthetic and the stem is inserted directly into the canal of the bone. The simulated anatomically correct condyle better distributes the load of the patient's weight and avoids twisting thereby relieving pain to improve the functional connection between the residual limb and an external prosthesis in all levels of upper and lower extremity amputations.Type: ApplicationFiled: January 11, 2007Publication date: July 12, 2007Inventors: John Fago, Julie Fago, Richard Greenwald, Michael Mayor
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Patent number: 7218682Abstract: Enhanced reception of transmitted signals in a communication system is achieved by synchronously combining transmissions from a cluster of transmitters at a distant receiver. The transmitters coordinate transmissions such that each substantially simultaneously transmits the same signal on the same communication channel. As a consequence of the spatial diversity of the transmitters, the transmitted signals arrive at the receiver at different times. The receiver essentially treats the different transmitted signals as though they were different multipath signals from a single transmitter. A multipath equalizer or combiner is used to determine timing offsets among the received signals, and the received signals are time aligned by phase rotating the signals in accordance with the estimated timing offsets. The time-aligned signals are then coherently combined and detected.Type: GrantFiled: February 12, 2002Date of Patent: May 15, 2007Assignee: ITT Manufacturing Enterprises, Inc.Inventors: Michael A. Mayor, Ning Lu
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Patent number: 7050775Abstract: A radio communication unit employs passive devices and a loop filter to receive a coded frequency modulated wakeup or synchronization signal that enables the receiving radio unit and initiates communications. The loop filter simultaneously tracks phase and frequency and provides smoothing to enable synchronization with weak signals (e.g., signals that typically do not enable a standard phase locked loop (PLL) to lock). In particular, when the communication unit is in a standby mode, the passive circuits of the present invention are receiving energy from a unit antenna and initially function as a phase locked loop (PLL) to lock onto an incoming signal. The wakeup or synchronization signal includes a series of tones at different frequencies, where the specific sequence is prearranged between the transmitting and receiving units. When each tone in the sequence has been detected by the receiving unit, the unit is enabled for communications.Type: GrantFiled: July 11, 2002Date of Patent: May 23, 2006Assignee: ITT Manufacturing Enterprises, Inc.Inventors: Michael A. Mayor, Ning Lu
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Patent number: 6859463Abstract: Operational parameters for transmitting a signal over a communication channel of a network are selected by first determining RF conditions on the communication channel from a received signal transmitted over the communication channel. An initial set of parameter values is selected for transmitting the signal based on RF conditions determined from the received signal. The initial set of parameter values is used to identify other sets of parameter values as other potential candidates for transmitting the signal. The parameter values in the other sets of parameter values differ from parameter values in the initial set of parameter values by less than a predetermined amount. The expected performance of the candidate sets of parameter values is compared to determine which set of parameter values has the best expected performance among the candidate sets of parameter values. The signal is transmitted on the communication channel using the selected set of parameter values.Type: GrantFiled: November 8, 2000Date of Patent: February 22, 2005Assignee: ITT Manufacturing Enterprises, Inc.Inventors: Michael A. Mayor, Donald J. Rasmussen, Eric A. Whitehill, Charles A. Simmons, Dennis McCrady
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Publication number: 20050031045Abstract: Enhanced reception of transmitted signals in a communication system is achieved by synchronously combining transmissions from a cluster of transmitters at a distant receiver. The transmitters coordinate transmissions such that each substantially simultaneously transmits the same signal on the same communication channel. As a consequence of the spatial diversity of the transmitters, the transmitted signals arrive at the receiver at different times. The receiver essentially treats the different transmitted signals as though they were different multipath signals from a single transmitter. A multipath equalizer or combiner is used to determine timing offsets among the received signals, and the received signals are time aligned by phase rotating the signals in accordance with the estimated timing offsets. The time-aligned signals are then coherently combined and detected.Type: ApplicationFiled: February 12, 2002Publication date: February 10, 2005Inventors: Michael Mayor, Ning Lu
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Publication number: 20040042535Abstract: A Direct Sequence Spread Spectrum receiver is described in which a complex spread spectrum signal is cross correlated by four digitally matched filters. The filters and subsequent multipliers correlate the in-phase and quadrature components as well as the current and previous symbols. The result is a more robust signal acquisition at very low signal to noise ratios.Type: ApplicationFiled: August 27, 2002Publication date: March 4, 2004Inventors: Michael A. Mayor, Lester G. Matheson, Robert D. Martin, John H. Gass, Mhairi N. McCune
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Patent number: 6700388Abstract: An EMI testing scheme involves analyzing an analog input signal in frequency band segments. The input signal is passband filtered and digitally sampled before being converted to a complex analytic signal via a Hilbert transform filter and then transformed into a frequency domain signal via a Discrete Fourier Transform (DFT). Pre-stored frequency window filters are then applied to the frequency domain signal. The set of discrete filter sample points which form the window filters are designed such that particular frequency sub-bands of a desired bandwidth within the frequency segment are selected for EMI analysis. By applying different frequency window filters to the frequency domain signal, different frequency sub-bands are sequentially selected for analysis. An inverse DFT transforms the filtered signal back to the time domain, and the peak voltage of the time domain signal is compared with a threshold to determine whether EMI levels within the selected sub-band are acceptable.Type: GrantFiled: February 19, 2002Date of Patent: March 2, 2004Assignee: ITT Manufacturing Enterprises, Inc.Inventors: Michael A. Mayor, David W. Lagrow
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Publication number: 20040009759Abstract: A radio communication unit employs passive devices and a loop filter to receive a coded frequency modulated wakeup or synchronization signal that enables the receiving radio unit and initiates communications The loop filter simultaneously tracks phase and frequency and provides smoothing to enable synchronization with weak signals (e.g., signals that typically do not enable a standard phase locked loop (PLL) to lock). In particular, when the communication unit is in a standby mode, the passive circuits of the present invention are receiving energy from a unit antenna and initially function as a phase locked loop (PLL) to lock onto an incoming signal. The wakeup or synchronization signal includes a series of tones at different frequencies, where the specific sequence is prearranged between the transmitting and receiving units. When each tone in the sequence has been detected by the receiving unit, the unit is enabled for communications.Type: ApplicationFiled: July 11, 2002Publication date: January 15, 2004Inventors: Michael A. Mayor, Ning Lu
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Patent number: 5943322Abstract: Personal communications in a code division multiple access system operated without a base is provided with simultaneous transmission of a communications channel and a control channel, each spread by different PN codes. The PN code facilitates restricting communications on the network to a particular conversation mode and between identified radios. Transmissions are performed in a time division duplex manner in 62.5 milliseconds slots. One of the radios initiates transmission and maintains power control and time synchronization normally done by a base station. A network control station can voluntarily or by command transfer control of the network to any of the other radios on the network. Colliding transmissions from more than one radio require the radios to retry transmitting until one of the radios transmits in an earlier time slot.Type: GrantFiled: April 24, 1996Date of Patent: August 24, 1999Assignee: ITT Defense, Inc.Inventors: Michael A. Mayor, Paul A. Gilmour