Abstract: A system for pre-processing transmission sequences in a jammed environment. System a transmitter suitable for transmitting the synchronization preamble further comprising a pseudo noise generator suitable for running a non predictable pseudo random algorithm. Pseudo random algorithm is suitable for generating a codeword operable as a pointer indexed into a table of gold sequences. Pointer is suitable for selecting a pseudo random selection of gold sequences from the table of gold sequences. Pseudo random selection of gold sequences forms a synchronization preamble. Gold sequences are concatenated together to form the synchronization preamble. System further comprises a receiver configured to receive the transmitted synchronization preamble further comprising of a decryption key suitable for decrypting received synchronization preamble.

Abstract: A system and method for sensing elevation terrain using an airborne weather radar. Method techniques include sampling first and second radar returns from a weather radar at two portions of an antenna. First radar returns are removed from second radar returns to generate third radar returns for a third portion of the antenna. The third portion of the antenna is included in the second portion but not the first portion. Changes in the third radar return are analyzed to sense elevation of the terrain.

Abstract: A power supply for a communications device, including a controllable regulator that varies power drawn from a power input according to communications requirements of the communications device. The controllable regulator increases power drawn from the power input immediately before an increase of power is required by the communications device when a magnitude of a rate of change of required power exceeds a predetermined level. An active filter is connected to an output of the controllable regulator. The active filter is controlled to variably divert power that is output from the controllable regulator in excess of what is required by the communications device, wherein electromagnetic emissions resulting from the rate of change of power are reduced.

Abstract: The present invention is a method and system for high performance programmable cryptography. In an embodiment of the invention, a cryptography system in accordance with the present invention may include a processor with memory, at least two field programmable gate array (FPGA) blocks and control logic which may be algorithm independent. Programming files storing one or more crypto algorithms may be maintained remotely to the cryptography system whereby the cryptography system may remain not cryptographically controlled when un-programmed. FPGA blocks may be field-programmed to allow execution of a desired crypto algorithm. Additionally, with multiple FPGA logic blocks, programming of a first FPGA block may be simultaneously performed with the execution of a crypto algorithm via a second FPGA block to enable enhanced encryption rate performance.

Abstract: A communications system utilizes a forward error correction (FEC) regulation system in transmitting data to a mobile client. The FEC strength is regulated as a function of a mobile client location and channel statistics for the location. The communications system includes a server for providing the FEC, a channel statistics database for storing channel data for locations of the mobile client, and a map database. The FEC strength is based on mobile client position and channel performance statistics measured by the mobile client over a period of time and sent to the server or optionally on previously collected and stored channel statistics measurements for the mobile client position or predicted position. The collection of channel statistics is made with an automated system to create a channel statistics measurement database. The FEC strength is varied by modifying packet payload redundancy, packet time spreading, interleave characteristics and error coding rates.

Abstract: In some embodiments, a reflector antenna may include one or more of the following features: (a) a reflector having a tunable reflective surface, (b) a reflector feed having tunable substrate materials, and (c) a sub-reflector.

Abstract: An architecture for a frequency hopped spread-spectrum transmitter-receiver in an advanced tactical data link packet switched network that ensures optimal Statistical Priority-based Media Access (SPMA) performance, enables more efficient packing of hop channels in a given allocated bandwidth and counteracts hostile jamming. The transmitter-receiver supports a scalable symbol rate mode that reduces the symbol rate in the time domain and decreases the bandwidth in the frequency domain, over a predetermined prior value. A transceiver according to the present architecture is able to statically or dynamically scale the symbol rate of transmissions, operate in burst mode and change the hop set. In one embodiment the transceiver is part of a Software Defined Radio (SDR).

Abstract: A system for simultaneously transmitting and receiving signals in a frequency hopping system. The system includes a multiplexor configured to filter a plurality of frequency hopping message pulses based on a frequency associated with each pulse, a plurality of transceivers configured to receive the pulses from the multiplexor, and a modem configured for simultaneous transmission and reception whereby transmission of the pulses are isolated from potentially received pulses by selecting a specific sub-band and transceiver corresponding to the specific sub-band through which to transmit each pulse.

Abstract: A radio system comprises radio frequency receiving electronics and digital signal processing electronics coupled to the radio frequency receiving electronics. The radio system is characterized by security electronics coupled to the digital signal processing electronics. The security electronics comprise a cryptographic subsystem. The cryptographic subsystem comprises cryptographic equipment software, core cryptographic algorithms and a cryptographic engine abstraction layer hardware each of which is stacked with but separate from one another. The cryptographic engine abstraction layer hardware has been designed for the specific radio system design.

Abstract: The present invention is a MEMS-based broadband transceiver/sensor. A MEMS-based transceiver/sensor in accordance with the present invention may comprise: (a) an antenna; (b) a front-end triplexer block; (c) a plurality of N transceiving channels; and (d) an RF energy sensor. The front end triplexer block may comprise M triplexers, each triplexer having MEMS-based filters. The transceiving channels may each comprise: (i) a local oscillator; (ii) a mixer; (iii) a first N:1 MEMS-based switch; (iv) a plurality of N MEMS-based variable bandwidth bandpass filters; and (v) a second N:1 MEMS-based switch. The RF energy sensor may comprise: (vi) an M:1 MEMS-based switch; (vii) a local oscillator; (viii) a mixer; and (ix) a plurality of MEMS-based variable bandwidth bandpass filters.

Abstract: A radio is disclosed. The radio system includes radio system nodes that are configured with a transceiver to transmit and receive information over more than one frequency. Each radio system node also includes a processor, the processor being any of a variety of processing elements, including but not limited to general purpose processors, coders, decoders, and the like. The processor is configured to gather a block of information and configured to format the block of information into a plurality of sub blocks. Each sub block of information includes message synchronization information. The sub blocks are dispersed in time and over the more than one frequency and substantially simultaneous transmission and reception of multiple transmissions in the same frequency band is enabled.

Abstract: A tamper resistant semiconductor package includes a surface having flip chip electrical contacts. A flip chip semiconductor of the package also has flip chip electrical contacts. The flip chip semiconductor has a maximum temperature to which it can be exposed before being damaged. Flip chip solder joints physically couple and electrically connect the flip chip electrical contacts of the flip chip semiconductor to the flip chip electrical contacts of the surface. The flip chip solder joints are formed of an alloy having a higher melting point than the maximum temperature such that removal of the flip chip semiconductor from the surface by heating will destroy the functionality of the flip chip semiconductor.

Abstract: A software defined radio system is described. The software defined radio comprises a modem bank at least partially defined by software running on a processor. The software defined radio also comprises an antenna group translator coupled to the modem bank. The software defined radio also comprises at least one antenna coupled to the antenna group translator. Further, the software defined radio comprises a program stored in a memory and running on the processor. The program is configured to generate a test signal to be leaked by the first of the at least two channels and to be received by the second of the two channels. The program is configured to automatically and autonomously verify the availability of a function of one of the at least two channels and determine the integrity of the function of the one of the at least two channels.

Abstract: A process for use in conjunction with a communications network routing protocol that automatically adjusts for congestion that may occur due to the presence of advantaged and partially disadvantaged nodes. The network nodes check to determine if they are advantaged or partially disadvantaged. Advantaged nodes may, for example, be airborne or satellite nodes having a high degree of network connectivity. Partially disadvantaged nodes may comprise nodes that are low on power. Advantaged nodes and partially disadvantaged nodes adjust the network metrics entered into the routing tables they use to advertise their routing information over the network to show longer pathways through such nodes. As a result the other nodes in the network reduce the amount of network traffic routed through advantaged and disadvantaged nodes.

Abstract: A method of disrupting communications reception of a target radio receiver. A plurality of transmitters transmit a noise signal toward the target radio transceiver. Each of the plurality of transmitters has a receiver associated therewith A first transmitter ceases transmitting a noise signal at a pre-determined time. A receiver associated with the first transmitter receives information from another of the plurality of transmitters when the first transmitter has ceased transmitting the noise signal. The first transmitter resumes the transmission of the noise signal after the information has been transmitted.

Abstract: A method for alignment comprises calculating the proper alignment position for a plurality of planar items based on at least one datum per planar item of the plurality of planar items, instructing a tooling system to form a tooling aid for providing the proper alignment position in a planar substrate lamination apparatus, and inserting the tooling aid into the planar substrate lamination apparatus for the proper alignment of the plurality of planar items in the planar substrate lamination apparatus.

Abstract: The present invention is a position-based channel coding system for communications devices. The device may comprise one or more of the following features: (a) a global positioning system (GPS) receiver capable of receiving positioning data from GPS satellites; (b) a radio frequency (RF) transceiver having at least a first channel and a second channel; (c) a geographical information system (GIS) database of topographical data; (d) a processor capable of optimizing transceiving parameters of the RF transceiver based on the positioning data and topographical data; and (e) a bus linking the GPS receiver, RF transceiver, GIS database, and processor.

Abstract: A method for handling data transmission errors in a wireless communication network includes receiving a first data from a first node at a second node using a data transmission protocol having a first slot for transmitting the first data. The first slot includes a plurality of bits and a first slot header comprising an acknowledgment request for at least one group of bits. The method also includes evaluating the first set of data for errors and generating a second slot using the data transmission protocol. The second slot includes at least a second slot header comprising acknowledgement data in response to the acknowledgement request. The acknowledgement data has a structure based on a Forward Error Correction (FEC) protocol block size. The second slot is then transmitted to the first node.

Abstract: The present invention is a method for reducing aviation voice communication confusion. The method includes receiving a first voice radio communication in a processing system. The method further includes receiving a second voice radio communication in the processing system. The method further includes comparing the first voice radio communication to the second voice radio communication. The method further includes providing an alert when the compared first voice radio communication and second voice radio communication are at least substantially inconsistent in content. The processing system implements speech recognition functionality when comparing the first voice radio communication to the second voice radio communication.

Abstract: A method of detecting weather on an aircraft uses a weather radar system. The method includes determining a location of a reflective radar target, accessing a database having stored information relating to ground clutter of a reflective radar target, retrieving weather radar information associated with the location, and automatically adjusting the weather radar return threshold in response to the information. The method can adjust a threshold for a weather radar display, adjust a weather radar signal gain, adjust a tilt angle of the weather radar, or adjust a ground clutter suppression threshold. The method can be implemented by hardware and/or software.