Method for estimating arrival time of wireless communication signal and computer-readable recording medium recording same
AssigneeVilliv Micron Inc.
InventorsJae Hong Eom, Yunho Jung, Jeonghyeon Cheon, Hyunsu Hwang
Life of this patent
Estimating the term…
Abstract
A method for estimating an arrival time of a wireless communication signal comprises the steps of: receiving a packet including a first preamble, a second preamble, and a start of frame delimiter (SFD) by a receiver; estimating, by the receiver, a first delay time on the basis of a time point of demodulating the SFD and the symbol length of the first preamble; and estimating, by the receiver, a second delay time on the basis of an accumulated correlation degree calculated by performing an accumulated correlation calculation on the second preamble.
Claims17
A method of estimating time of arrival (TOA) of a wireless communication signal, the method comprising:
- receiving, by a receiver, a packet including a first preamble, a second preamble, and a start of frame delimiter (SFD);
- estimating, by the receiver, a first delay time based on an SFD demodulation time at which the SFD is demodulated and on a symbol length of the first preamble;
- and
- estimating, by the receiver, a second delay time based on a cumulative correlation calculated by performing a cumulative correlation operation on the second preamble;
- and
- estimating a total delay time by adding the first delay time and the second delay time.
A method of estimating time of arrival (TOA) of a wireless communication signal, the method comprising:
- receiving, by a receiver, a packet including a first preamble, a second preamble, and a start of frame delimiter (SFD);
- estimating, by the receiver, a first delay time based on an SFD demodulation time at which the SFD is demodulated and on a symbol length of the first preamble;
- and
- estimating, by the receiver, a second delay time based on a cumulative correlation calculated by performing a cumulative correlation operation on the second preamble;
- wherein the estimating of the first delay time comprises:
- detecting a first count corresponding to the SFD demodulation time;
- detecting a second count corresponding to a reception time at which the packet is received by subtracting, from the first count, a count associated with the symbol length of the first preamble and a count associated with a symbol length of the SFD;
- and
- estimating the first delay time by multiplying the second count by a sampling period.
A method of estimating time of arrival (TOA) of a wireless communication signal, the method comprising:
- receiving, by a receiver, a packet including a first preamble, a second preamble, and a start of frame delimiter (SFD);
- estimating, by the receiver, a first delay time based on an SFD demodulation time at which the SFD is demodulated and on a symbol length of the first preamble;
- and
- estimating, by the receiver, a second delay time based on a cumulative correlation calculated by performing a cumulative correlation operation on the second preamble;
- wherein the estimating of the second delay time comprises:
- estimating an error in a sampling interval using an average operation of the calculated cumulative correlation;
- and
- estimating the second delay time by multiplying the estimated error by a sampling period.
Dependencies are inferred from the claim text.