Abstract: A method for satellite receiver autonomous integrity monitoring (RAIM) real time fault detection and exclusion implementation comprising the following steps: (1) continuously computing a horizontal protection level (HPL) and a vertical 32 protection level (VPL) associated with the effective configuration of real time measurement geometry; (2) if the HPL is less than or equal to the horizontal alert limit (HAL), and/or if the VPL is less than or equal to said vertical alert limit (VAL); declaring the RAIM detection function available; (3) continuously computing a horizontal exclusion level (HEL) and continuously computing a vertical exclusion level (VEL) associated with the effective configuration of real time measurement geometry; and (4) if the HEL is less than or equal to the HAL, and/or if the VEL is less than or equal to the VAL, declaring the RAIM fault exclusion function available.

Abstract: A microwave transistor structure having a step drain region comprising: (A) a substrate having a top surface; (B) a silicon semiconductor material of a first conductivity type, having a first dopant concentration and a top surface; (C) a conductive gate overlying and insulated from the top surface of the silicon semiconductor material; (D) at least one horizontal drain extension region of a second conductivity type and having a horizontal drain extension dopant concentration; (E) a step drain region formed in the silicon semiconductor material, and contacting the horizontal drain extension region; (F) a body region of the first conductivity type and having a body region dopant concentration; (G) a source region of the second conductivity type and having a source region dopant concentration; (H) a shield plate region formed on the top surface of the silicon semiconductor material over a portion of the horizontal drain extension region, the shield plate being adjacent and parallel to the horizontal drain extens

Abstract: An apparatus for improving linearity of an RF signal comprising: (a) a splitter configured to receive an input RF signal, and configured to split the input RF signal into two RF signals comprising a first input RF signal, and a second input RF signal; (b) an over-biased non-linear RF power amplifier configured to receive the first input RF signal and configured to generate an over-biased non-linear output signal having an over-biased non-linear distortion component; (c) an under-biased non-linear RF power amplifier configured to receive the second input RF signal and configured to generate an under-biased non-linear output signal having an under-biased non-linear distortion component; and (d) a combiner configured to combine the over-biased non-linear output signal and the under-biased non-linear output signal, and configured to output the RF signal having substantially cancelled over-biased and under-biased distortion components.

Abstract: A microwave transistor structure comprising: (1) a substrate having a top surface; (2) a silicon semiconductor material of a first conductivity type; (3) a conductive gate; (4) a channel region of a second conductivity type; (5) a drain region of the second conductivity type; (6) a body of the first conductivity type; (7) a source region of the second conductivity type; (8) a shield plate region formed on the top surface of the silicon semiconductor material over a portion of the channel region, wherein the shield plate is adjacent and parallel to the drain region, and to the conductive gate region; and (9) a conductive plug region formed in the body region of the silicon semiconductor material, wherein the conductive plug region connects a lateral surface of the body region to the top surface of the substrate.

Abstract: A method for substituting at least one high quality position measurement with a set of upgraded low quality position measurements comprising the steps of: selecting a high quality source of position measurements of an object; obtaining at least one high quality position measurement of the object by using the high quality source; wherein each high quality position measurement of the object satisfies the threshold of acceptability requirement for the object; saving at least one high quality position measurement of the object taken at at least one high quality epoch timing coordinate; selecting a low quality source of position measurements of the object; obtaining at least one low quality position measurement of the object using the low quality source; if at least one high quality position measurement of the object is available and substantially recent, using at least one high quality position measurement of the object for navigation purposes of the object; if each high quality position measurement of the object

Abstract: A method for improving a satellite receiver autonomous integrity monitoring (RAIM) availability and fault detection and exclusion (FDE) function by using an adaptive threshold logic. The method comprises the following steps: (A) pre-computing a database of thresholds; (B) selecting in real time from the database a plurality of thresholds corresponding to a set of available measurements; and (C) determining an optimum RAIM/FDE function corresponding to the set of available measurements by using the adaptive threshold logic that utilizes the plurality of thresholds corresponding to the set of available measurements. The set of available measurements is selected from the group consisting of: {a GPS measurement, a GLONASS measurement, a GALILEO measurement, a baro measurement, a clock measurement, and a pseudolite measurement}.

Abstract: Method for predistortion compensation for nonlinear distortion produced by the non-linear power amplifier of the QAM signal at the transmitter side of the direct digital communication channel. The out-of-band signal power is monitored by the existent receiver at the receive side of the direct propagation channel. The nonlinear distortion compensation signal is generated at the receiver/demodulator side of the direct propagation channel and transmitted across the direct propagation channel to an input of a pre-distortion block at the transmitter/modulator side of the direct propagation channel. The nonlinear distortion compensation signal is used to adjust the set of parameters of the pre-distortion block in order to minimize the out-of-band power produced by the non-linear amplifier (NLA).

Abstract: A lateral RF MOS transistor with at least one conductive plug structure comprising: (1) a semiconductor material of a first conductivity type having a first dopant concentration and a top surface; (2) a conductive gate overlying and insulated from the top surface of the semiconductor material; (3) at least two enhanced drain drift regions of the second conductivity type of the RF MOS transistor; the first region laying partially underneath the gate; the second enhanced drain drift region contacting the first enhanced drain drift region, the dopant concentration of the second enhanced drain drift region is higher than the dopant concentration of the first enhanced drain drift region; (4) a drain region of the second conductivity type contacting the second enhanced drain drift region; (5) a body region of said RF MOS transistor of the first conductivity type with the dopant concentration being at least equal to the dopant concentration of the semiconductor epi layer; (6) a source region of the second conductivi

Abstract: A method of guiding a vehicle in adjacent swaths across terrain that may slope comprising the steps of: (1) determining the tilt of the vehicle with respect to Earth due to a slope of the terrain; (2) determining the position with respect to Earth of a predetermined location that is fixed relative to the vehicle; and (3) using the tilt and position determinations to provide information for guiding the vehicle to prevent gaps and overlaps between adjacent swaths as the slope changes.

Abstract: A lateral RF MOS transistor with at least one conductive plug structure comprising: (1) a semiconductor material of a first conductivity type having a first dopant concentration and a top surface; (2) a conductive gate overlying and insulated from the top surface of the semiconductor material; (3) at least two enhanced drain drift regions of the second conductivity type of the RF MOS transistor; the first region laying partially underneath the gate; the second enhanced drain drift region contacting the first enhanced drain drift region, the dopant concentration of the second enhanced drain drift region is higher than the dopant concentration of the first enhanced drain drift region; (4) a drain region of the second conductivity type contacting the second enhanced drain drift region; (5) a body region of said RF MOS transistor of the first conductivity type with the dopant concentration being at least equal to the dopant concentration of the semiconductor epi layer; (6) a source region of the second conductivi

Abstract: A method and a system for creating a Positional Reality scene of a plurality of real objects that represents a virtual reality scene with the correct positional information about real objects are disclosed. A Positioning Reality Image of each geometrical object is built by using an integrated Satellite Positional System (SATPS), and a Scanning Laser Sensor (SLS). If SATPS comprises an RTK GPS system, a Positioning Reality Image of each geometrical object is built in real time.

Abstract: A tamper-resistant apparatus located on board of an aircraft for avoiding a restricted air space (RAS) comprising: (a) a tamper-resistant restricted air space (TAP-RAS) database configured to include a set of coordinates that determines the RAS; and (b) a navigational processor configured to navigate the aircraft around the RAS, if a valid overriding command is not generated. The navigational processor includes: a Satellite Positioning System (SATPS) configured to substantially continuously obtain a set of real time position coordinates of the aircraft; a restricted airspace controller configured to receive a set of real time data including the set of coordinates that determines the RAS, the set of real time position coordinates; and configured to analyze the set of real time data in order to substantially continuously generate a set of real time commands; and an aircraft controller configured to navigate the aircraft utilizing the real time set of commands around the RAS.

Abstract: The apparatus and method for the multipath pseudo-range error signal reduction using wide correlated optimized additional signals are disclosed. The wide correlated additional signals can be generated at different levels of the standard tracking channel to achieve the same result of minimizing the multipath signal. The additional signals are wide correlated and optimized during one-two chip periods.

Abstract: A microwave transistor structure comprising: (a) a SiC substrate having a top surface; (b) a silicon semiconductor material of a first conductivity type overlaying the top surface of the semiconductor substrate and having a top surface; (c) a conductive gate overlying and insulated from the top surface of the silicon semiconductor material; (d) a channel region of the first conductivity type formed completely within the silicon semiconductor material including a channel dopant concentration; (e) a drain region of the second conductivity type formed in the silicon semiconductor material and contacting the channel region; (f) a body region of the first conductivity type and having a body region dopant concentration formed in the silicon semiconductor material under the conductive gate region; (g) a source region of the second conductivity type and having a source region dopant concentration formed in the silicon semiconductor material within the body region; (h) a shield plate region being adjacent and being pa

Abstract: The system and method for long baseline RTK survey are disclosed. The system includes a primary base station (PBS), a secondary base station (SBS), a primary data link between the PBS and the SBS, and a secondary data link between the SBS and a rover. The PBS, the SBS, and the rover are equipped with satellite antennas for satellite navigational purposes, and with the wireless Internet data accesses devices (WIDAD). The long baseline vector between the PBS and the rover is established by combining the primary baseline vector between the SBS and the PBS and the secondary baseline vector between the SBS and the rover. The PBS is placed in a position with a known location. The PBS wirelessly downloads its logged set of data into the Internet server using the (PBS-WIDAD). The SBS determines its precise position coordinates by accessing wirelessly the PBS logged data on the Internet server using the (SBS-WIDAD).

Abstract: The satellite navigational system integrated with the tilt measurement system capable of precise measurement of the actual coordinates of the mobile unit that moves along a track with variable tilt is disclosed. Using the integrated satellite/tilt measurement system, a plurality of 3 dimensional lines separated by optimal swathing offset vector can be formed and followed in order to provide field guidance during a precision farming operation across variably inclined terrain.

Abstract: A network of non-cooperative integrated pseudolite (PL)/satellite base station (SBS) transmitters covering an open area. The network comprises a first plurality (K) of integrated pseudolite/satellite base station (PL)1/(SBS) transmitters, located in an open area A, and a second plurality (M) of non-cooperative integrated PL2/SBS transmitters, located in an open area B. K and M are integers. Each PL transmitter is co-located with one SBS. Each SBS provides a satellite timing synchronization signal. Each integrated active (transmitting) PL/SBS transmitter transmits its position location as a part of its message. The first plurality (K) of integrated PL1/SBS transmitters includes a substantially sufficient number of active integrated PL1/SBS transmitters in order to fill out satellite shades of coverage and to substantially cover the area A. Each integrated PL2/SBS transmitter continuously detects a plurality of ranging signals transmitted by each active integrated PL1/SBS transmitter.

Abstract: An integrated split-spectrum pseudolite/satellite base station (SS-PL)/SBS transmitter comprising a satellite base station and a split-spectrum pseudolite (SS-PL) transmitter co-located with the satellite base station. The satellite base station provides a timing synchronization signal. The satellite base station also provides a self-surveying capability for the split-spectrum pseudolite (SS-PL). The split-spectrum pseudolite (SS-PL) generates a split-spectrum sideband signal that minimizes interference with the reception of at least one satellite signal by the satellite base station.

Abstract: A satellite positioning-based guidance system and method that utilize a simulated inertial navigation system are disclosed. The trajectory of the body of a non-thrusted flight vehicle is used instead of a conventional inertial navigation system. The attitude of the flight vehicle is determined using a satellite receiver, and the Extended Kalman filter is used to implement the navigation function.

Abstract: An original previously compressed video stream image having a first level of compression including a first level of quantization is decompressed, and a set of original motion vectors for each P source picture and for each B source picture is recovered and saved. The decompressed video stream image is re-compressed re-using the most relevant saved original motion vectors in order to create a re-compressed video stream image having a second level of compression including a second level of quantization. The most relevant motion vectors point out to the camera movement and to the moving objects within the original reference frame.