Invention Grant
- Patent Title: System and method for the mitigation of multipath and the improvement of signal-to-noise ratios in time division multiple access(TDMA) location networks
- Patent Title (中): 用于减轻多径的系统和方法以及时分多址（TDMA）定位网络中信噪比的改善
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Application No.: US10527747Application Date: 2003-09-19
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Publication No.: US07652625B2Publication Date: 2010-01-26
- Inventor: David Small
- Applicant: David Small
- Priority: AU2002951632 20020920
- International Application: PCT/AU03/01246 WO 20030919
- International Announcement: WO2004/027927 WO 20040401
- Main IPC: G01S1/08
- IPC: G01S1/08 ; G01S3/02 ; G01S5/02
Abstract:
A positioning system that includes a plurality of chronologically synchronized Time Division Multiple Access (TDMA) Positioning-Unit Devices and a position receiver incorporating a TDMA Adaptive Directional Antenna Array is disclosed. The plurality of chronologically synchronized Positioning-Unit Devices, positioned at known locations, transmit positioning signals in a predetermined Time Division Multiple Access (TDMA) sequence, such that each Positioning-Unit Device has a unique transmission time slot. The TDMA Adaptive Directional Antenna Array is configured to consecutively steer a directional receive antenna in spatial synchronization with the plurality of Time Division Multiple Access (TDMA) Positioning-Unit Device transmissions, such that the directional receive antenna is oriented toward the currently transmitting Positioning-Unit Device, or the directional receive antenna is oriented toward the origin of the currently received positioning signal. The TDMA Adaptive Directional Antenna Array is controlled by a deterministic algorithm based on the knowledge of the Positioning-Unit Device locations, TDMA Adaptive Directional Antenna Array location, TDMA Adaptive Directional Antenna Array attitude, network Time Division Multiple Access (TDMA) transmission sequencing, Positioning-Unit Device positioning signal propagation delays, and network time.
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