BEAM FORMING DEVICE AND METHOD USING FREQUENCY-DEPENDENT CALIBRATION
First Claim
1. A beam forming device comprising:
- a transmitter arrangement comprising at least one transmit antenna that transmits radiation towards a scene,a receiver arrangement comprising at least one receive antenna that receives radiation from said scene and at least one receive unit that generates receive signals from said received radiation, wherein the total number of transmit antennas and receive antennas is at least three,a beam forming unit that performs beam forming to obtain beam formed output signals from said receive signals by use of corrected beam forming weights, anda correction unit that corrects preliminary beam forming weights in amplitude and/or phase by use of frequency-dependent final calibration coefficients representing the different amplitude and/or phase responses of the different channels between said at least one transmit antenna and said at least one receive antenna at two or more separate frequencies covered by the radiation used for illumination of the scene.
1 Assignment
0 Petitions
Accused Products
Abstract
A beam forming device that enables the use for wideband digital beam forming and provide a high accuracy a beam forming device comprises a transmitter arrangement and a receiver arrangement, wherein the total number of transmit antennas and receive antennas is at least three. A beam forming unit performs beam forming to obtain beam formed output signals from said receive signals by use of corrected beam forming weights. A correction unit corrects preliminary beam forming weights in amplitude and/or phase by use of frequency-dependent final calibration coefficients representing the different amplitude and/or phase responses of the different channels between said at least one transmit antenna and said at least one receive antenna at two or more separate frequencies covered by the radiation transmitted towards the scene.
-
Citations
20 Claims
-
1. A beam forming device comprising:
-
a transmitter arrangement comprising at least one transmit antenna that transmits radiation towards a scene, a receiver arrangement comprising at least one receive antenna that receives radiation from said scene and at least one receive unit that generates receive signals from said received radiation, wherein the total number of transmit antennas and receive antennas is at least three, a beam forming unit that performs beam forming to obtain beam formed output signals from said receive signals by use of corrected beam forming weights, and a correction unit that corrects preliminary beam forming weights in amplitude and/or phase by use of frequency-dependent final calibration coefficients representing the different amplitude and/or phase responses of the different channels between said at least one transmit antenna and said at least one receive antenna at two or more separate frequencies covered by the radiation used for illumination of the scene. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 18)
-
-
17. A beam forming method comprising the steps of:
-
transmitting radiation towards a scene by at least one transmit antenna, receiving radiation from said scene by at least one receive antenna, wherein the total number of transmit antennas and receive antennas is at least three, generating receive signals from said received radiation, correcting preliminary beam forming weights in amplitude and/or phase by use of frequency-dependent final calibration coefficients representing the different amplitude and/or phase responses of the different channels between said at least one transmit antenna and said at least one receive antenna at two or more separate frequencies covered by the radiation transmitted towards the scene, and beam forming to obtain beam formed output signals from said receive signals by use of the corrected beam forming weights. - View Dependent Claims (19, 20)
-
Specification