Calibration apparatus for array antenna radio receiving apparatus
First Claim
1. A calibration apparatus for an array antenna radio receive system having an array antenna with a plurality of antenna elements and a plurality of radio reception units provided for each of said antenna elements, comprising:
- supply means for supplying a calibration signal with substantially the same frequency band as a spread signal used for spread spectrum communications to each of said radio reception units;
detection means for detecting at least one of delay characteristics and amplitude characteristics of said radio reception units from said calibration signal that has passed said radio reception units.
0 Assignments
0 Petitions
Accused Products
Abstract
In an array antenna radio receive system comprising an array antenna containing a plurality of antenna elements and a plurality of radio reception units provided for said antenna elements, a calibration signal with substantiallyy the same frequency band as a spread signal used for spread spectrum communications is passed through said radio reception units and the delay characteristic or amplitude characteristic of said radio reception units is detected from said calibration signal that has passed said radio reception units.
41 Citations
18 Claims
-
1. A calibration apparatus for an array antenna radio receive system having an array antenna with a plurality of antenna elements and a plurality of radio reception units provided for each of said antenna elements, comprising:
-
supply means for supplying a calibration signal with substantially the same frequency band as a spread signal used for spread spectrum communications to each of said radio reception units;
detection means for detecting at least one of delay characteristics and amplitude characteristics of said radio reception units from said calibration signal that has passed said radio reception units. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 18)
-
-
16. A delay detection apparatus that detects the amount of delay of each of radio reception units for an array antenna radio receive system comprising an array antenna containing a plurality of antenna elements and a plurality of said radio reception units provided for said antenna elements, comprising:
-
supply means for supplying a calibration signal with substamtially the same frequency band as the spread signal used for spread spectrum communications to each of said radio reception units;
detection means for detecting the amount of delay of said radio reception units from said calibration signal that has passed said radio reception units.
-
-
17. An amplitude detection apparatus that detects the amplitude characteristic of each of radio reception units for an array antenna radio receive system comprising an array antenna containing a plurality of antenna elements and a plurality of said radio reception units provided for said antenna elements, comprising:
-
supply means for supplying a calibration signal with substantially the same frequency band as the spread signal used for spread spectrum communications to each of said radio reception units;
detection means for detecting the amplitude characteristic of said radio reception units from said calibration signal that has passed said radio reception units.
-
Specification