Abstract: A system and a method. The system may include a node of a network of nodes. The network may be a combined time division multiple access (TDMA) and contention access (CA) waveform network configured to utilize a combined TDMA and CA waveform. The combined TDMA and CA waveform may include a slot ring. The slot ring may include a plurality of TDMA slots and at least one CA period.

Abstract: A system and a method. The system may include a node of a network of nodes, wherein the network is configured as a modified time division multiple access (TDMA) network. The node may include a processor and a transceiver communicatively coupled to the processor. The processor may be configured to: collect data received from each other node of the network during a data collection phase of a given modified TDMA cycle, the collected data including information of connectivity between pairs of nodes of the network; and output the collected data for transmission to each other node of the network during a data distribution phase of the given modified TDMA cycle.

Abstract: Embodiments of the inventive concepts disclosed herein are directed to systems and methods for managing network communications. A transceiver of a first node may receive, from a second node of the plurality of nodes, a transmission sequence generated according to a communications cost value determined for each pair of the nodes in the communications node. The transmission sequence may specify a third node followed by the first node as consecutive nodes for transmitting packets. A sequence manager of the first node may detect that reception of a terminal packet of the one or more packets from the third node has or should have just completed. The sequence manager may initiate transmission by the transceiver immediately upon the detection.

Abstract: A mobile ad hoc wireless network which utilizes Doppler data when deciding with which neighboring node to communicate. Using age of the Doppler data as well as the sign and the magnitude of the relative movement between nodes to make routing determinations.

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 dual mode, digital servo positioning system controls servo motor current by a processor-generated current control set point in conjunction with velocity feedback. When the motor has advanced to the vicinity of a target position, the processor opens the velocity feedback loop and reduces servo amplifier gain, such that the set point controls motor current without velocity feedback. This open loop condition provides a springy servo response that eliminates oscillation due to small deviations from target position caused by electronic drift or gravity. Position information is provided to the processor by means of quadrature encoded tachometer pulses from the motor.