Abstract: A system for directionally classifying of a radio signal originating from an emitter. The system includes a receiving-station, which includes at least two antennas, a single-channel-receiver producing a first and a second received signals and a switch alternately coupling each of the antennas with the single-channel-receiver. The system further includes another receiving-station which includes another receiver, producing another received signal, coupled with a first other antenna. The system further includes directional-classifier which includes a phase-difference-detector, coupled with the single-channel-receiver and with said another receiver. The phase-difference-detector produces a first phase difference measurement when the switch couples one antenna with the single-channel-receiver. The phase-difference-detector further produces a second phase-difference-measurement when the switch couples the other antenna with the single-channel-receiver.

Abstract: A system for directionally classifying of a radio signal originating from an emitter. The system includes a receiving-station, which includes at least two antennas, a single-channel-receiver producing a first and a second received signals and a switch alternately coupling each of the antennas with the single-channel-receiver. The system further includes another receiving-station which includes another receiver, producing another received signal, coupled with a first other antenna. The system further includes directional-classifier which includes a phase-difference-detector, coupled with the single-channel-receiver and with said another receiver. The phase-difference-detector produces a first phase difference measurement when the switch couples one antenna with the single-channel-receiver. The phase-difference-detector further produces a second phase-difference-measurement when the switch couples the other antenna with the single-channel-receiver.

Abstract: An Active Noise Control (ANC) for controlling a noise produced by a noise source may include an acoustic sensor (212) to sense a noise pattern and to produce a noise signal corresponding to the sensed noise pattern, an estimator (202) to produce a predicted noise signal by applying an estimation function to the noise signal, and an acoustic transducer (216) to produce a noise destructive pattern based on the predicted noise signal.

Abstract: An Active Noise Control (ANC) for controlling a noise produced by a noise source may include an acoustic sensor (212) to sense a noise pattern and to produce a noise signal corresponding to the sensed noise pattern, an estimator (202) to produce a predicted noise signal by applying an estimation function to the noise signal, and an acoustic transducer (216) to produce a noise destructive pattern based on the predicted noise signal.

Abstract: An Active Noise Control (ANC) for controlling a noise produced by a noise source may include an acoustic sensor (212) to sense a noise pattern and to produce a noise signal corresponding to the sensed noise pattern, an estimator (202) to produce a predicted noise signal by applying an estimation function to the noise signal, and an acoustic transducer (216) to produce a noise destructive pattern based on the predicted noise signal.

Abstract: A method for managing connections between at least one client and at least one data server, said method comprises: (a) providing an intermediary connection apparatus comprising connections to a plurality of clients over a WAN or a LAN environment, said apparatus comprising memory buffers and at least one connection to each of said at least one data server(s) being continuously open; (b) establishing a client network connection between said apparatus and one of said clients via a network; (c) receiving a client request to receive a response from a data server over said client network connection; (d) forwarding to the data server either a request or a partial request; (e) limiting the size of the response or partial response that the server is allowed to provide at a given time to said apparatus in response to said client request; and (f) buffering data encoding requests and responses in said apparatus according to data traffic load over the connection to said server and to said client, respectively.

Abstract: An Active Noise Control (ANC) for controlling a noise produced by a noise source may include an acoustic sensor (212) to sense a noise pattern and to produce a noise signal corresponding to the sensed noise pattern, an estimator (202) to produce a predicted noise signal by applying an estimation function to the noise signal, and an acoustic transducer (216) to produce a noise destructive pattern based on the predicted noise signal.

Abstract: A method for managing connections between at least one client and at least one data server, said method comprises: (a) providing an intermediary connection apparatus comprising connections to a plurality of clients over a WAN or a LAN environment, said apparatus comprising memory buffers and at least one connection to each of said at least one data server(s) being continuously open; (b) establishing a client network connection between said apparatus and one of said clients via a network; (c) receiving a client request to receive a response from a data server over said client network connection; (d) forwarding to the data server either a request or a partial request; (e) limiting the size of the response or partial response that the server is allowed to provide at a given time to said apparatus in response to said client request; and (f) buffering data encoding requests and responses in said apparatus according to data traffic load over the connection to said server and to said client, respectively.

Abstract: A caching method for decreasing the number of access requests for object files that are forwarded from user computers to a server farm having computers operating with web-based applications via a network. A cache memory at the server farm function as an interface between the server computers and the network infrastructure, via which access requests are forwarded by the computers. The most current popular object files are stored in the cache memory; and the cache memory, in place of the server computers, accepts requests from one of the user computers for an object file. If the object file is stored in the cache memory it is forwarded to the requesting user computer; and if the object file is not stored in the cache memory, the request is forwarded to the server computers.

Abstract: A data communication system is provided for use with a cellular system containing an array of cells and a cellular transmitter/receiver located within each cell of the array. Each cellular transmitter/receiver is adapted for transmitting and receiving voice and/or data communication over predetermined channelized frequencies associated with the particular cell in which the cellular transmitter/receiver is located. In accordance with the invention a base data transmission station is located in each cell and is adapted for transmitting a single data stream across a plurality of channels, each of which channels is adapted to carry a single stream of information. Each base data transmitting station does not transmit on the predetermined channels that are assigned to the particular cell in which the base data transmitting station is located (i.e., those channels are "notched").