Base station using an antenna array for location determination
First Claim
1. A base station comprising:
- a plurality of antennas, each of the antennas separated by a known distance;
means for transmitting a first spread spectrum signal having a first code;
means for receiving, using the plurality of antennas, a second spread spectrum signal having a second code, the second spread spectrum signal time synchronized with the first spread spectrum signal;
means for making a distance determination based on in part a timing difference between the second code of the received second spread spectrum signal and the first code of the base station'"'"'s transmitted first spread spectrum signal;
means for comparing a phase difference of a carrier signal of the second spread spectrum signal as received by each of the plurality of antennas; and
means for determining an angle of the received second spread spectrum signal using the known distance between the antennas and the phase difference; and
means for determining a location of a source of the second spread spectrum signal using the determined angle and the distance determination.
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Abstract
A base station comprises a plurality of antennas. Each of the antennas is separated by a known distance. A first spread spectrum signal is transmitted having a first code. Using the plurality of antennas, a second spread spectrum signal is received having a second code. The second spread spectrum signal is time synchronized with the first spread spectrum signal. A distance determination is made based on in part a timing difference between the second code of the received second spread spectrum signal and the first code of the base station'"'"'s transmitted first spread spectrum signal. A phase difference of a carrier signal of the second spread spectrum signal as received by each of the plurality of antennas is compared. An angle of the received second spread spectrum signal is determined using the known distance between the antennas and the phase difference. A location of a source of the second spread spectrum signal is determined using the determined angle and the distance determination.
20 Citations
3 Claims
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1. A base station comprising:
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a plurality of antennas, each of the antennas separated by a known distance;
means for transmitting a first spread spectrum signal having a first code;
means for receiving, using the plurality of antennas, a second spread spectrum signal having a second code, the second spread spectrum signal time synchronized with the first spread spectrum signal;
means for making a distance determination based on in part a timing difference between the second code of the received second spread spectrum signal and the first code of the base station'"'"'s transmitted first spread spectrum signal;
means for comparing a phase difference of a carrier signal of the second spread spectrum signal as received by each of the plurality of antennas; and
means for determining an angle of the received second spread spectrum signal using the known distance between the antennas and the phase difference; and
means for determining a location of a source of the second spread spectrum signal using the determined angle and the distance determination. - View Dependent Claims (2, 3)
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Specification