Mobile-communication equipment and transmission power control method
View Patent ↗Mobile communication equipment comprises a power amplifier for amplifying a transmission signal and a feedback circuit for providing feedback to allow the above-described power amplifier to output a transmission-power set value. The feedback circuit comprises an error detection unit for detecting an error between a power value obtained by detecting a portion of the power of the transmission signal amplified by the power amplifier and the transmission-power set value specified by the above-described transmission-power specifying unit, a Loop-gain generating unit for periodically switching two different loop-gain values at a predetermined time ratio to output one of them, a loop-gain multiplying unit for multiplying the error detected by the error-detection unit by the loop-gain value outputted from the loop-gain generating unit to output an error value that results from the multiplication, and a feedback-amount generating unit for integrating the error value outputted from the loop-gain multiplying unit to generate a specific amount of the feedback.
1. Mobile communication equipment comprising:
a power amplifier for amplifying a transmission signal; and
a feedback circuit for providing feedback to allow said power amplifier to output a transmission-power set value, wherein
said feedback circuit comprises:
a transmission-power specifying unit for specifying said transmission-power set value;
an error-detection unit for detecting an error between a power value obtained by detecting a portion of the power of the transmission signal amplified by said power amplifier and the transmission-power set value specified by said transmission-power specifying unit;
a loop-gain generating unit for periodically switching two different loop-gain values at a predetermined time ratio to output one of them;
a loop-gain multiplying unit for multiplying the error detected by said error-detection unit by the loop-gain value supplied from said loop-gain generating unit to output an error value that results from said multiplication; and
a feedback-amount generating unit for integrating the error value supplied from said loop-gain multiplying unit to generate a specific amount of said feedback.
2. Mobile communication equipment comprising:
a power amplifier for amplifying a transmission signal; and
a feedback circuit for providing feedback to allow said power amplifier to output a transmission-power set value, wherein
said feedback circuit comprises:
a transmission-power specifying unit for specifying said transmission-power set value;
an error-detection unit for detecting an error between a power value obtained by detecting a portion of the power of the transmission signal amplified by said power amplifier and the transmission-power set value specified by said transmission-power specifying unit;
a temperature measuring unit for measuring the temperature of a predetermined portion and outputting a timing signal upon detection of a certain amount of temperature change;
a loop-gain generating unit for holding a first loop-gain value and a second loop-gain value that is larger than said first loop-gain value, and upon receipt of said timing signal provided from said temperature measuring unit, outputting said second loop-gain value for a predetermined period, and outputting said first loop-gain value except for said predetermined period;
a loop-gain multiplying unit for multiplying the error detected by said error-detection unit by the loop-gain value supplied from said loop-gain generating unit, and outputting an error value as said multiplication results; and
a feedback-amount generating unit for integrating the error value supplied from said loop-gain multiplying unit to generate a specific amount of said feedback.
3. Mobile-communication equipment according to claim 2 , wherein
said predetermined portion is a portion of the circuit of the mobile-communication equipment on which said power amplifier is provided.
4. Mobile communication equipment comprising:
a power amplifier for amplifying a transmission signal; and
a feedback circuit for providing feedback to allow said power amplifier to output a transmission-power set value, wherein
said feedback circuit comprises:
a transmission-power specifying unit for specifying said transmission-power set value;
an error-detection unit for detecting an error between a power value obtained by detecting a portion of the power of the transmission signal amplified by said power amplifier and the transmission-power set value specified by said transmission-power specifying unit;
a temperature measuring unit for measuring the temperature of a predetermined portion and outputting a timing signal upon detection of a given amount of temperature change;
a loop-gain generating unit for holding a first loop-gain value and a second loop-gain value that is larger than said first loop-gain value, and upon receipt of said timing signal provided from said temperature measuring unit, outputting said second loop-gain value for a predetermined period, and periodically switching said first and second loop-gain values at a predetermined time ratio to output one of them except for said predetermined period;
a loop-gain multiplying unit for multiplying the error detected by said error-detection unit by the loop-gain value outputted from said loop-gain generating unit, and outputting an error value that results from said multiplication; and
a feedback-amount generating unit for integrating the error value supplied from said loop-gain multiplying unit to generate a specific amount of said feedback.
5. Mobile-communication equipment according to claim 4 , wherein
said predetermined portion is a portion of the circuit of the mobile-communication equipment on which said power amplifier is provided.
6. A transmission-power control method for providing feedback to allow a power amplifier to amplify a transmission signal to output a specified transmission-power set value, comprising:
a first step of detecting a portion of the power of the transmission signal amplified by said power amplifier to obtain a power value;
a second step of detecting an error between a power value obtained in said first step and said specified transmission-power set value;
a third step of periodically switching two different loop-gain values at a predetermined time ratio to output one of them; and
a fourth step of multiplying the error detected in said second step by the loop-gain value outputted in said third step, and integrating an error value that results from said multiplication to generate a specific amount of said feedback.
7. A transmission-power control method for providing feedback to allow a power amplifier to amplify a transmission signal to output a specified transmission-power set value, comprising:
a first step of detecting a portion of the power of the transmission signal amplified by said power amplifier to obtain a power value;
a second step of detecting an error between a power value obtained in said first step and said specified transmission-power set value;
a third step of measuring the temperature of a predetermined portion and detecting a certain amount of temperature change;
a fourth step of holding a first loop-gain value and a second loop-gain value that is larger than said first loop-gain value, and upon detection of a certain amount of temperature change in said third step, outputting said second loop-gain value for a predetermined period, and outputting said first loop-gain value except for said predetermined period; and
a fifth step of multiplying the error detected in said second step by the loop-gain value outputted in said fourth step, and integrating an error value that results from said multiplication to generate a specific amount of said feedback.
8. A transmission-power control method according to claim 7 , wherein
said predetermined portion is a portion of the circuit for performing said feedback on which said power amplifier is provided.
9. A transmission-power control method for providing feedback to allow a power amplifier to amplify a transmission signal to output a specified transmission-power set value, comprising:
a first step of detecting a portion of the power of the transmission signal amplified by said power amplifier to obtain a power value;
a second step of detecting an error between a power value obtained in said first step and said specified transmission-power set value;
a third step of measuring the temperature of a predetermined portion and detecting a certain amount of temperature change;
a fourth step of holding a first loop-gain value and a second loop-gain value that is larger than said first loop-gain value, and upon detection of a certain given amount of temperature change in said third step, outputting said second loop-gain value for a predetermined period, and periodically switching said first and second loop-gain values at a predetermined time ratio to output one of them except for said predetermined period; and
a fifth step of multiplying the error detected in said second step by the loop-gain value outputted in said fourth step, and integrating an error value that results from said multiplication to generate a specific amount of said feedback.
10. A transmission-power control method according to claim 9 , wherein
the above-described predetermined portion is a portion of the circuit for performing said feedback on which the above-described power amplifier is provided.