Abstract: A directional access network can include a plurality of nodes and wireless links between ones of the nodes. Topology management of the network can discover when network fragmentation exists, identify nodes positioned to heal the fragmentation, and establish new active links between the identified nodes.

Abstract: A signal transmission system comprising a transmitter, a rotating transmitting antenna connected to the transmitter, a receiver, and a receiving antenna connected to the receiver. A controller connected to the transmitter is adapted to control the transmitter based upon a location of the receiving antenna relative to the transmitting antenna. The controller is also adapted to limit a transmission of signals from the transmitter to when a predetermined beam pattern of the transmitting antenna is at least partially aligned with the receiving antenna.

Abstract: An apparatus for detecting the presence of a target in an n-dimensional array of digital data samples comprises: 1) a reading module, which reads the samples from the data array in overlapping groups; 2) a quantizing module, coupled to the reading module, which quantizes each of the overlapping groups of data samples and which generates an index that identifies the quantized group; and 3) a comparing module, coupled to the quantizing module, which compares indexes from the quantizing module to multiple reference indexes, each of which represents a quantized group of data samples that identify a distinctive feature of the target.

Abstract: High speed computing apparatus for performing real time data compression of analog voice data or digital data to be transmitted over a data link. The incoming data stream is divided into blocks of digital data and the blocks are subdivided into digital samples or elements to be compressed. Each sample is analyzed individually to determine its estimated variance and the marginal return to be gained by alloting the sample one or more of the bits to be employed to define the block of digital data. The bits are assigned samples having the highest estimated variance factor so that an optimum allocation of bits to individual samples is achieved with variable ratio data compression. The allocated bits are employed to encode the samples during real time data compression and transmission.