Method and apparatus for remotely calibrating a phased array system used for satellite communication
First Claim
1. A method for remotely calibrating a system having a plurality of N elements, N being a positive integer number, said method comprising the steps of:
- coherently generating a calibration signal and a reference signal having a predetermined spectral relationship between one another;
applying to each respective one of said plurality of N elements the calibration signal;
encoding the calibration signal applied to each respective one of said plurality of N elements to generate first and second sets of encoded signals;
transmitting the first and second sets of encoded signals and the reference signal to a remote location;
coherently detecting the transmitted first and second sets of encoded signals at the remote location;
decoding the coherently detected first and second sets of encoded signals to generate a set of decoded signals; and
processing the set of decoded signals for generating calibration data for each element of said system.
1 Assignment
0 Petitions
Accused Products
Abstract
A method and apparatus for remotely calibrating a system having a plurality of N elements, such as a phased array system, is provided. The method includes generating coherent signals, such as a calibration signal and a reference signal having a predetermined spectral relationship between one another. The calibration signal which is applied to each respective one of the plurality of N elements can be orthogonally encoded based on the entries of a predetermined invertible encoding matrix, such as a binary Hadamard matrix, to generate first and second sets of orthogonally encoded signals. The first and second sets of orthogonally encoded signals and the reference signal are transmitted to a remote location. The transmitted first and second sets of orthogonally encoded signals are coherently detected at the remote location. The coherently detected first and second sets of orthogonally encoded signals are then decoded using the inverse of the predetermined invertible encoding matrix to generate a set of decoded signals. The set of decoded signals is then processed for generating calibration data for each element of the system.
89 Citations
30 Claims
-
1. A method for remotely calibrating a system having a plurality of N elements, N being a positive integer number, said method comprising the steps of:
-
coherently generating a calibration signal and a reference signal having a predetermined spectral relationship between one another; applying to each respective one of said plurality of N elements the calibration signal; encoding the calibration signal applied to each respective one of said plurality of N elements to generate first and second sets of encoded signals; transmitting the first and second sets of encoded signals and the reference signal to a remote location; coherently detecting the transmitted first and second sets of encoded signals at the remote location; decoding the coherently detected first and second sets of encoded signals to generate a set of decoded signals; and processing the set of decoded signals for generating calibration data for each element of said system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
-
16. Apparatus for remotely calibrating a system having a plurality of N elements, N being a positive integer number, said apparatus comprising:
-
a coherent signal generator for generating a calibration signal and a reference signal having a predetermined spectral relationship between one another; means for applying to each respective one of said plurality of N elements the calibration signal; means for encoding the calibration signal applied to each respective one of said plurality of N elements to generate first and second sets of encoded signals; means for transmitting the first and second sets of encoded signals and the reference signal to a remote location; a coherent detector for detecting the transmitted first and second sets of encoded signals at the remote location; means for decoding the coherently detected first and second sets of encoded signals to generate a set of decoded signals; and a processor adapted to process the set of decoded signals for generating calibration data for each element of said system. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
-
Specification