Method for estimating arrival direction of desired wave
AssigneeNEC Corporation
InventorMasashi Hirabe
Life of this patent
Estimating the term…
Abstract
A method for estimating an arrival direction of a desired wave in which the arrival direction of the desired wave can be estimated even in case of existence of a multiple reflection wave. An identical signal series is repetitively transmitted two or more times from a transmitting side. The transmitted signal series is received by an array antenna having a plurality of element antennas on a receiving side. When the signal is received by each of the element antennas, cross-correlation is calculated between the signal series corresponding to the different repetition of the signal transmission from the transmitting side. Then, a MUSIC algorithm or an ESPRIT algorithm using the cross-correlation matrix is applied to estimate the arrival direction of the desired wave.
Claims13
A method for estimating an arrival direction of a desired wave by receiving a radio wave propagated from a transmitting side at a receiving side, comprising the steps of:
- receiving a signal series on the receiving side on an antenna array having a plurality of antenna elements, said signal series being repeatedly transmitted two or more times from the transmission side;
- calculating a cross-correlation for each element antenna between a pair of the received signal series corresponding to different repetition times of the signal series;
- and
- estimating the arrival direction of the radio wave by using a cross-correlation matrix derived from the cross-correlation of each antenna element.
An apparatus for estimating an arrival direction of a desired wave by receiving a radio wave propagated from a transmitting side at a receiving side, comprising:
- an antenna array having a plurality of antenna elements, said antenna array receiving a signal series which is repeatedly transmitted form the transmitting side;
- analog-to-digital conversion means for converting a signal received on each antenna element into a digital signal sequence;
- and
- processing means for calculating a cross-correlation for each antenna element between a pair of the received signal series corresponding to different repetition times, and estimating the arrival direction of the radio wave by using a cross-correlation matrix thereof.
Dependencies are inferred from the claim text.