Open loop polar transmitter having on-chip calibration
First Claim
1. An on-chip calibration system for a transceiver, comprising:
- a transmitter;
a receiver;
a phase and amplitude determination element configured to determine amplitude and phase characteristics of an output signal generated in the transmitter, the signal representing transmitter characteristics;
an amplitude comparison element configured to compare the signal representing transmitter characteristics with a desired amplitude signal and generate an amplitude compensation signal;
an AM predistortion element configured to modify an ideal AM signal with the amplitude compensation signal;
a phase comparison element configured to compare the signal representing transmitter characteristics with a desired phase signal and generate a phase compensation signal; and
a PM predistortion element configured to modify an ideal phase signal with the phase compensation signal.
1 Assignment
0 Petitions
Accused Products
Abstract
An on-chip calibration system comprises a transmitter, a receiver, a phase and amplitude determination element configured to determine amplitude and phase characteristics of an output signal generated in the transmitter, the signal representing transmitter characteristics, an amplitude comparison element configured to compare the signal representing transmitter characteristics with a desired amplitude signal and generate an amplitude compensation signal, an AM predistortion element configured to modify an ideal AM signal with the amplitude compensation signal, a phase comparison element configured to compare the signal representing transmitter characteristics with a desired phase signal and generate a phase compensation signal, and a PM predistortion element configured to modify an ideal phase signal with the phase compensation signal.
52 Citations
21 Claims
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1. An on-chip calibration system for a transceiver, comprising:
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a transmitter;
a receiver;
a phase and amplitude determination element configured to determine amplitude and phase characteristics of an output signal generated in the transmitter, the signal representing transmitter characteristics;
an amplitude comparison element configured to compare the signal representing transmitter characteristics with a desired amplitude signal and generate an amplitude compensation signal;
an AM predistortion element configured to modify an ideal AM signal with the amplitude compensation signal;
a phase comparison element configured to compare the signal representing transmitter characteristics with a desired phase signal and generate a phase compensation signal; and
a PM predistortion element configured to modify an ideal phase signal with the phase compensation signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for performing on-chip calibration for a transceiver, comprising:
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providing an output signal;
routing the output signal to a receiver;
determining amplitude and phase characteristics of the output signal, the output signal representing transmitter characteristics;
comparing the amplitude characteristics of the transmitted signal to a desired AM signal and developing an AM predistortion signal;
comparing the phase characteristics of the transmitted signal to a desired PM signal and developing a PM predistortion signal; and
compensating the amplitude and phase characteristics of the output signal. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. An on-chip calibration system for a portable transceiver, comprising:
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a transmitter including a power amplifier configured to provide an output signal;
a receiver configured to receive the output signal;
a phase and amplitude determination element configured to determining amplitude and phase characteristics of the output signal, the output signal representing transmitter characteristics;
an amplitude comparison element configured to compare the amplitude characteristics of the transmitted signal to a desired AM signal;
an AM predistortion element configured to develop an AM predistortion signal and apply the AM predistortion signal to the desired AM signal;
a phase comparison element configured to compare the phase characteristics of the transmitted signal to a desired PM signal; and
a phase predistortion element configured to develop a PM predistortion signal and apply the PM predistortion signal to the desired PM signal. - View Dependent Claims (20, 21)
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Specification