Base station for distance determination
AssigneeInterDigital Technology Corporation
InventorDavid K. Mesecher
Life of this patent
Estimating the term…
Abstract
A base station transmits a first spread spectrum signal having a first code. It receives and analyzes an impulse response of multipath components of a second spread spectrum signal having a second code to determine a first received component. The second 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 signal and the first code of the base station's transmitted first signal and the determined first received components for that base station's received second signal.
Claims6
A base station comprising:
- means for transmitting a first spread spectrum signal having a first code;
- means for receiving and analyzing an impulse response of multipath components of a second spread spectrum signal having a second code to determine a first received component of the second spread spectrum signal, the second spread spectrum signal time synchronized with the first spread spectrum signal;
- and
- 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 and the determined first received component for that base station's received second spread spectrum signal.
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, and analyzing an impulse response of multipath components of a second spread spectrum signal having a second code to determine a first received component of the second spread spectrum signal, 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 and the determined first received component for that base station's received second 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 distance determination and the phase difference.
Dependencies are inferred from the claim text.