Dennis Kory King
Plumbers in Sandy, UT

5929783, Jul 27, 1999

Jul 30, 1997

8/902959

Dennis D. King - Sandy UT
Jeffery W. Brabender - Taylorsville UT

Raytheon Company - Lexington MA

G06F 1108

34087005

A method and apparatus for encoding and decoding data on navigation signal pulse pairs utilizes pulse position modulation (PPM). The pulse interval between a first pulse and a second pulse of the pulse pair is varied depending on whether the logic value of the data to be encoded is a logic "0" or a logic "1". A tri-graph encoding process converts the raw input data into encoded input data. Each input data bit is encoded into three bits with each bit having the same logical value as the input data bit. The encoded input data is then encoded on the navigation signal using a pulse position modulation (PPM) technique. A decoder recovers the encoded data and provides an error correction process for high data integrity that corrects certain bit errors that may occur during the transmission and reception of the data on the navigation signal. The error correction process detects and corrects errors such as a missing bit, an extra bit or a bit error.

5691723, Nov 25, 1997

Sep 11, 1995

8/526231

Dennis D. King - Sandy UT
Jeffery W. Brabender - Taylorsville UT

E-Systems, Inc. - Dallas TX

G01S 502

341178

A method and apparatus for encoding and decoding data on navigation signal pulse pairs utilizes pulse position modulation (PPM). The pulse interval between a first pulse and a second pulse of the pulse pair is varied depending on whether the logic value of the data to be encoded is a logic "0" or a logic "1". A tri-graph encoding process converts the raw input data into encoded input data. Each input data bit is encoded into three bits with each bit having the same logical value as the input data bit. The encoded input data is then encoded on the navigation signal using a pulse position modulation (PPM) technique. A decoder recovers the encoded data and provides an error correction process for high data integrity that corrects certain bit errors that may occur during the transmission and reception of the data on the navigation signal. The error correction process detects and corrects errors such as a missing bit, an extra bit or a bit error.

4646097, Feb 24, 1987

May 6, 1985

6/730559

Dennis D. King - Sandy UT

E-Systems, Inc. - Dallas TX

G01S 108

342 95

A precision distance measuring equipment (DME/P) receiver for detecting an RF signal including at least one interrogation pulse is described. The DME/P receiver includes first and second signal processing channels. The first processing channel includes a wideband filter, of bandwidth BW1, for receiving the processed RF signal and in response thereto generating a wideband (FA) mode signal proportional to the logarithm thereof. The second signal processing channel includes a narrowband filter, of bandwidth BW2, for receiving the processed RF signal and in response thereto generating a narrowband (IA) mode signal proportional to the logarithm thereof, the bandwidth BW2 of the narrowband filter being within the bandwidth BW1 of the wideband filter. A frequency discriminator circuit receives samples of the FA and IA mode signals from the first and second signal processing channels, and in response thereto generates a control signal when the pulse has a frequency within the bandwidth BW1 but outside the bandwidth BW2, the control signal representing an "off-channel" condition. In operation, gating circuits are connected to receive the control signal from the frequency discriminator circuit and operate to inhibit further processing of the FA and IA mode signals in the receiver during the "off-channel" condition.

4676660, Jun 30, 1987

Aug 4, 1986

6/874439

Dennis D. King - Sandy UT
David F. Dautel - W. Bountiful UT

E-Systems, Inc. - Dallas TX

G04E 800

368113

A noise pulse rejection circuit for use in a pulse type time-of-arrival detection system is described. Preferably, the pulse type time-of-arrival detection system includes a precision distance measuring equipment (DME/P) receiver having a delay-attenuate-compare (DAC) detector. The DAC detector produces first time-of-arrival detector outputs due to receiver noise, and a second time-of-arrival detector output upon detection of a received DME pulse having a leading edge, each of the first time-of-arrival detector outputs having a substantially shorter period than the period of the second time-of-arrival detector output. The noise pulse rejection circuit preferably includes a monostable multivibrator, which is triggered by the first and second time-of-arrival detector outputs to generate a timing signal having first and second logic states, the timing signal normally changing from a first logic state to a second logic state after a predetermined time period "T". Because the output of the monostable multivibrator has a longer period than the period of each time-of-arrival detector output, the monostable multivibrator can only "time-out" upon reception of the desired pulse.

4610549, Sep 9, 1986

May 6, 1985

6/730560

Dennis D. King - Sandy UT
David F. Dautel - W. Bountiful UT

E-Systems, Inc. - Dallas TX

G04F 800

368113

A noise pulse rejection circuit for use in a pulse type time-of-arrival detection system is described. Preferably, the pulse type time-of-arrival detection system includes a precision distance measuring equipment (DME/P) receiver having a delay-attenuate-compare (DAC) detector. The DAC detector produces first time-of-arrival detector outputs due to receiver noise, and a second time-of-arrival detector output upon detection of a received DME pulse having a leading edge, each of the first time-of-arrival detector outputs having a substantially shorter period than the period of the second time-of-arrival detector output. The noise pulse rejection circuit preferably includes a monostable multivibrator, which is triggered by the first and second time-of-arrival detector outputs to generate a timing signal having first and second logic states, the timing signal normally changing from a first logic state to a second logic state after a predetermined time period "T". Because the output of the monostable multivibrator has a longer period than the period of each time-of-arrival detector output, the monostable multivibrator can only "time-out" upon reception of the desired pulse.

4724442, Feb 9, 1988

May 29, 1986

6/868248

Dennis D. King - Sandy UT

E-Systems, Inc. - Dallas TX

G01S 504

342434

A method and apparatus is provided for deriving the direction of a received signal from a signal source using first and second orthogonally-mounted loop antennas and an omnidirectional antenna. In operation, output signals from each of the antennas are generated and repeatedly supplied to signal processing circuitry in a cyclical fashion as the receiver is rotated to locate the transmitter. The amplitudes of the output signals from the first and second loop antennas are then compared to determine whether the signal source is located in a null of the second loop antenna. If so, a null indication signal is generated. The phases of the output signals from the second loop antenna and the omnidirectional antenna are compared to determine whether the received signal is being received in a predetermined region of the second loop antenna. If so, an ambiguity indication signal is generated. The null indication signal and the ambiguity indication signal are then logically combined to generate a visual output representing the direction of the signal source.