Systems and methods of wireless position tracking
First Claim
Patent Images
1. A position tracking system comprising:
- a transmitting antenna transmitting a radio frequency (RF) signal modulated by a first pseudo-random noise sequence;
a plurality of receiving antennae acquiring the RF signal, one of the plurality of receiving antennae being designated a reference antenna, the plurality of receiving antennae including at least three receiving antennae;
a corresponding plurality of demodulators, each demodulator of the plurality of demodulators coupled to a respective one of the plurality of receiving antennae and configured to demodulate the RF signal received by the respective receiving antenna using a second pseudo-random noise sequence;
a processing unit determining phase differences between a reference recovered signal derived from the demodulated RF signal received by the reference antenna and a recovered signal derived from the demodulated RF signal received by each remaining receiving antenna of the plurality of receiving antennae, the processing unit computing a position of the transmitting antenna with respect to the plurality of receiving antennae based on the determined phase differences.
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Abstract
Position and orientation tracking systems and methods include a transmitting antenna transmitting a radio frequency (RF) signal. At least one receiving antenna acquires the RF signal. One of the at least one receiving antenna and the transmitting antenna is designated a reference antenna. A processing unit determines a phase difference between the RF signal received by each receiving antenna and the reference antenna. The processing unit computes a position of the transmitting antenna with respect to the at least one receiving antenna in response to the phase difference determined for each receiving antenna.
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Citations
27 Claims
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1. A position tracking system comprising:
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a transmitting antenna transmitting a radio frequency (RF) signal modulated by a first pseudo-random noise sequence; a plurality of receiving antennae acquiring the RF signal, one of the plurality of receiving antennae being designated a reference antenna, the plurality of receiving antennae including at least three receiving antennae; a corresponding plurality of demodulators, each demodulator of the plurality of demodulators coupled to a respective one of the plurality of receiving antennae and configured to demodulate the RF signal received by the respective receiving antenna using a second pseudo-random noise sequence; a processing unit determining phase differences between a reference recovered signal derived from the demodulated RF signal received by the reference antenna and a recovered signal derived from the demodulated RF signal received by each remaining receiving antenna of the plurality of receiving antennae, the processing unit computing a position of the transmitting antenna with respect to the plurality of receiving antennae based on the determined phase differences. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of tracking a position of a transmitting antenna, comprising:
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receiving a radio frequency (RF) signal modulated by a first pseudo-random noise sequence, transmitted by the transmitting antenna, with at least three receiving antennae; designating one of the at least three receiving antennae as a reference antenna; demodulating the RF signal received by the reference antenna with a second pseudorandom noise sequence to produce a reference recovered signal; demodulating the RF signal received by each remaining receiving antenna of the at least three receiving antennae with the second pseudo-random noise sequence to produce recovered RF signals; determining phase differences between the reference recovered signal and the recovered signals; and computing the position of the transmitting antenna with respect to the receiving antennae based on the computed phase differences. - View Dependent Claims (18, 19, 20)
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21. A position tracking system comprising:
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a plurality of transmitting antennae each transmitting a radio frequency (RF) signal modulated by a first pseudo-random noise sequence, the plurality of transmitting antennae including at least three transmitting antennae and one of the plurality of transmitting antennae being designated a reference antenna; a receiving antenna configured to receive the RF signals transmitted by the plurality of transmitting antennae; a demodulator coupled to the receiving antenna and configured to demodulate the RF signals received by the receiving antenna using a second pseudo-random noise sequence; a processing unit determining phase differences between a reference recovered signal derived from the demodulated RF signal transmitted by the reference antenna and a recovered signal derived from the demodulated RF signal transmitted by each remaining transmitting antenna of the plurality of transmitting antennae, the processing unit computing a position of the receiving antenna with respect to the plurality of transmitting antennae based on the determined phase differences. - View Dependent Claims (22, 23, 24, 25, 26, 27)
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Specification