Method and apparatus for power estimation in a communication system
First Claim
1. An apparatus comprising a signal power estimator, the signal power estimator comprising:
- (a) demodulating means for demodulating a received communication signal to derive a stream of samples selected from the group consisting of;
a stream of reference samples and a stream of data samples; and
(b) estimating means, operatively coupled to the demodulating means, for generating a complex signal power estimate of the power of the received communication signal as a function of the stream of samples.
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Abstract
A method and apparatus is provided for estimating signal power. This is accomplished by demodulating a received communication signal to derive a stream of samples. These samples may consist of either reference samples, data samples, or a combination thereof. An estimate of the power of the received communication signal is then generated as a function of the stream of samples. The signal power estimate may, for example, be used in a power control algorithm by setting a power control indicator in response to a comparison between the signal power estimate and a predetermined threshold. Subsequently, the power control indicator is transmitted over a communication channel to another communication unit. The communication unit detects a power control indicator within a signal received from over the communication channel and adjusts a particular signal transmission power of a signal transmitter in response to the detected power control indicator.
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Citations
34 Claims
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1. An apparatus comprising a signal power estimator, the signal power estimator comprising:
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(a) demodulating means for demodulating a received communication signal to derive a stream of samples selected from the group consisting of;
a stream of reference samples and a stream of data samples; and(b) estimating means, operatively coupled to the demodulating means, for generating a complex signal power estimate of the power of the received communication signal as a function of the stream of samples. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A communication unit, comprising:
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(a) a signal power estimator including demodulating means for demodulating a received communication signal to derive a stream of samples selected from the group consisting of;
a stream of reference samples and a stream of data samples, estimating means, operatively coupled to the demodulating means, for generating a complex signal power estimate of the power of the received communication signal as a function of the stream of samples, and means for determining a magnitude of the complex signal power estimate to produce a sample-based signal power estimate;(b) threshold means, operatively coupled to the signal power estimator, for setting a power control indicator in response to the result of a comparison between the sample-based signal power estimate and a predetermined threshold; and (c) signal transmitting means, operatively coupled to the threshold means, for transmitting the power control indicator over a communication channel. - View Dependent Claims (17)
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18. A communication unit, comprising:
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(a) signal receiving means for detecting a power control indicator within a signal received from over it communication channel, the power control indicator being derived from a comparison between a sample-based signal power estimate and a predetermined threshold, the sample-based signal power estimate being derived from it magnitude of a complex signal power estimate of a power of a despread communication signal as a function of a stream of samples selected from the group consisting of;
a stream of reference samples and a stream of data samples;(b) power adjustment means, operatively coupled to the signal receiving means, for adjusting a particular signal transmission power of a signal transmitter in response to the detected power control indicator. - View Dependent Claims (19)
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20. A method of estimating signal power, comprising:
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(a) demodulating a received communication signal to derive a stream of samples selected from the group consisting of;
a stream of reference samples and a stream of data samples; and(b) generating a complex signal power estimate of the power of the received communication signal as a function of the stream of samples. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification