Method and device for estimating a time of arrival of a radio signal
AssigneeHuawei Technologies Co., Ltd.
InventorsJiantao XUE, Yuan GAO, Jing HAN, Xizeng DAI
Life of this patent
Estimating the term…
Abstract
A method and device for estimating the time of arrival (ToA) of a radio signal are proposed. The radio signal comprises M subsignals carried on M subcarriers, where M is an integer ≥2. The number of propagation paths and the time of arrival associated with a first path are estimated. The technique can improve ToA estimation accuracy, especially in a multipath fading channel, and reduce the need for channel information.
Claims17
A method for estimating a time of arrival of a radio signal at a wireless communication device, wherein the radio signal comprises M subcarriers, wherein M≥2, and wherein the method comprises:
- receiving the radio signal by the wireless communication device;
- obtaining, by the wireless communication device, M subsignals from the M subcarriers, by demodulating each of the M subcarriers to obtain a respective one of the M subsignals;
- determining an autocorrelation matrix P of the M subsignals;
- estimating a number of propagation paths based on the eigenvalues and eigenvectors of the autocorrelation matrix;
- and
- estimating a time of arrival of the radio signal associated with a first path based on the eigenvalues and eigenvectors of the autocorrelation matrix and the estimated number of propagation paths.
A wireless communication device for estimating a time of arrival of a radio signal, wherein the radio signal comprises M subsignals carried on M subcarriers, each of the M subcarriers carrying one of the subsignals, wherein M≥2 and wherein the device comprises:
- a processor;
- and
- a non-transitory computer-readable storage medium storing a program to be executed by the processor, the program including instructions that, when executed by the processor, cause the processor to:
- receive the radio signal;
- obtain M subsignals from the M subcarriers, by demodulating each of the M subcarriers to obtain a respective one of the M subsignals;
- determine an autocorrelation matrix P of the M subsignals;
- estimate a number of propagation paths based on the eigenvalues and eigenvectors of the autocorrelation matrix;
- and
- estimate a time of arrival associated with a first path based on the eigenvalues and eigenvectors of the autocorrelation matrix and the estimated number of propagation paths.
Dependencies are inferred from the claim text.