METHOD AND APPARATUS FOR MEASURING AND CORRECTING RECEIVER PARAMETERS
First Claim
1. A method for measuring parameters of a receiver, the receiver including a mixer for generating an I signal and a Q signal using an input signal, an I channel circuit for processing the I signal, and a Q channel circuit for processing the Q signal, the method comprising:
- feeding the receiver a first testing signal before the mixer;
feeding the receiver a second testing signal on the I channel circuit;
feeding the receiver a third testing signal on the Q channel circuit; and
measuring I/Q quadrature deviation and I/Q delay imbalance of the receiver using the first, the second, and the third testing signals.
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Accused Products
Abstract
A method and apparatus for measuring parameters of a receiver having a mixer for generating an I signal and a Q signal using an input signal, an I channel circuit for processing the I signal, and a Q channel circuit for processing the Q signal. The method includes feeding the receiver a first testing signal before the mixer. The method includes feeding the receiver a second testing signal on the I channel circuit. The method includes feeding the receiver a third testing signal on the Q channel circuit. The method includes measuring I/Q quadrature deviation and I/Q delay imbalance of the receiver using the first, the second, and the third testing signals. This separates the I/Q quadrature deviation and I/Q delay imbalance.
30 Citations
20 Claims
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1. A method for measuring parameters of a receiver, the receiver including a mixer for generating an I signal and a Q signal using an input signal, an I channel circuit for processing the I signal, and a Q channel circuit for processing the Q signal, the method comprising:
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feeding the receiver a first testing signal before the mixer; feeding the receiver a second testing signal on the I channel circuit; feeding the receiver a third testing signal on the Q channel circuit; and measuring I/Q quadrature deviation and I/Q delay imbalance of the receiver using the first, the second, and the third testing signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A receiver comprising:
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a mixer for generating an I signal and a Q signal using an input signal; an I channel circuit for processing the I signal; a Q channel circuit for processing the Q signal; a first testing signal generating circuit for generating a first testing signal being connected to the signal path before the mixer; a second testing signal generating circuit for generating a second testing signal being connected to the I channel circuit; and a third testing signal generating circuit for generating a third testing signal being connected to the Q channel circuit. - View Dependent Claims (11, 12, 13, 14, 15, 20)
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16. A communication system, comprising:
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a receiver comprising a signal path, the signal path comprising a mixer for generating an I signal and a Q signal using an input signal, an I channel circuit for processing the I signal, and a Q channel circuit for processing the Q signal; a first testing signal generating circuit for generating a first testing signal being connected to the signal path before the mixer; a second testing signal generating circuit for generating a second testing signal being connected to the I channel circuit; and a third testing signal generating circuit for generating a third testing signal being connected to the Q channel circuit; and a demodulator comprising a digital signal processor for measuring I/Q quadrature deviation and I/Q delay imbalance using the first, the second, and the third testing signals in testing mode, and for demodulating in working mode. - View Dependent Claims (17, 18, 19)
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Specification