Method and System for Long-Range Adaptive Mobile Beam-Forming Ad-Hoc Communication System with Integrated Positioning
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Abstract
Method and system for provided a long range, high capacity ad-hoc mobile communication network where a narrow antenna beam formed by a plurality of antenna elements, radio transceivers and digital spatial signal processing is used to provide a high accuracy positioning system integrated into the communication system. The relative positions and directive orientation of all the units in the network is done by mutual exchange of positioning data as an element in the communication protocol in the network.
137 Citations
58 Claims
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1-29. -29. (canceled)
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30. A method of setting up a wireless long range communication network between several communication units each having a Long-range Adaptive Mobile Beam-forming Ad-hoc Communication (LAMBACOM) unit (11) including an array RF transceiver section (15), a spatial phase front analysis section (16), a delay section (18), a beam-former section (17), a RF switching section (13), an antenna element section (12), a positioning system (32), a communication controller (22) and a data link (23), comprising the following steps:
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a. performing a frame-by-frame spatial scan for a phase modulated, coherent code-word from other communication units using spatial analysis of signals from the RF-transceiver section (15); b. provide beam forming according to a selection of optimum signal to interference ratio via utilizing a digital antenna beam-former (17) with an appropriate coefficient set to optimize signal energy before first RX data are passed through a plurality of delay elements (18a-n) of the delay section (18) for achieving an optimum antenna shape and demodulation of the first received RX data from any direction; c. calculating the spatial angular direction of each received communication message from another communication unit in the network; d. measuring time-of-arrival between the communication units based on correlation of a code-word that is included in each communication message in the network; e. transmitting a response message to other communication units containing information about time-of-arrival for a decoded message and delay time from the time-of-arrival to the transmission of the response message; and f. mutually exchanging position information between all communication units in the network through the same RF transceiver section (15) that is used for positioning. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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- 45. A system for setting up a wireless long range communication network between several communication units, comprising a Long-range Adaptive Mobile Beam-forming Ad-hoc Communication (LAMBACOM) unit (11) including an array RF transceiver section (15), a spatial phase front analysis section (16), a delay section (18), a beam-former section (17), a RF switch section (13), an antenna element section (12) including a plurality of antenna elements (12a-n), a positioning system (32), a communication controller (22) and a data link (23), arranged to the communication units, characterized in that the communication controller (22) is configured for frame-by-frame spatial analysis of signals from the RF-transceiver section (15) for determining relative direction and time-of-flight between the communication units, for providing beam-forming according to a selection of optimum signal-to-interference ratio by providing a digital antenna beam-former (17) with an appropriate coefficient set to optimize signal energy before first RX data are passed through a plurality of delay elements (18a-n) of the delay section (18) for achieving an optimum antenna shape and demodulation of the first received RX data from any direction, and for using angular beam-forming information to provide a low latency relative positioning information for navigation purposes.
Specification