Calibration of an adaptive signal conditioning system

An adaptive signal and adjustment system technology, which is applied to the parts of the amplification device, electrical components, amplifiers, etc., can solve the problems of uncertainty, time required, aging, etc., and achieve reliable and effective calibration and accurate adaptive signal adjustment Effect

Inactive Publication Date: 2004-11-24
TELEFON AB LM ERICSSON (PUBL)
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Problems solved by technology

However, power detectors must also be calibrated for all known variables of interest such as power, temperature, and frequency
Although the power detector compensation is relatively small compared to the complete transmission path, it shows that this compensation still suffers from the same disadvantages as the previously described compensation, including aging uncertainty and the need for time

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  • Calibration of an adaptive signal conditioning system
  • Calibration of an adaptive signal conditioning system
  • Calibration of an adaptive signal conditioning system

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Embodiment Construction

[0056] Calibration of Universal Adaptive Signal Conditioning Systems

[0057] figure 2 is a schematic block diagram showing a general adaptive signal conditioning system applicable to arbitrary signal conversion systems according to the present invention. In an input signal path to the signal conversion system 220 , a signal conditioning module 210 is provided for preconditioning the signal to be converted by the signal conversion system 220 . In other words, the signal conditioning module 210 receives an input signal S 1N And vary this input signal according to the specific application. Then the final changed input signal is sent to the signal conversion system 220, and the signal conversion system 220 converts the changed input signal into an output signal S OUT . Signal conversion system 220 may be any signal conversion system known in the art that performs signal conversion, such as amplification, attenuation, frequency conversion, phase shifting, or any other filterin...

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Abstract

The invention provides robust and non-invasive calibration of an adaptive signal conditioning system having a signal conditioning block in the signal path to a signal conversion system, and a feedback path with a number of feedback components for enabling adaptation, by means of a parameter adaptation block, of the parameters used in the signal conditioning. In order to calibrate the feedback path, a well-defined reference signal is inserted into the feedback path, and an appropriate calibration coefficient is then determined by a coefficient calibrator in response to the received reference signal. The calibration coefficient is provided to a compensator, which effectively compensates for changes in the transfer characteristics of the feedback path due to factors such as variations in ambient temperature and component aging. Accordingly, the feedback signal transferred over the calibrated feedback path will be an accurate representation of the output signal of the signal conversion system, thus allowing accurate adaptive signal conditioning.

Description

technical field [0001] The present invention generally relates to an adaptive signal conditioning system and methods of calibrating such a system, as well as schemes for implementing adaptive signal conditioning techniques in power amplifier systems and multiband transmitter systems. Background technique [0002] Adaptive signal conditioning systems are found in all fields of electronics and communications, and are typically used to condition an input signal to a signal conversion system such as an amplifier chain or any other suitable system. Adaptive regulation to continuously provide the desired output signal for the entire system. [0003] Predistortion Distortion is a signal conditioning technique. For example in power amplifier and transmitter systems, as shown in references 1-9. The main purpose of predistortion is to compensate for the distortion caused by a power amplifier or similar system by pre-distorting the input signal to the power amplifier, taking advantag...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/32
CPCH03F1/3247
Inventor S·莱尤杰姆V·布杰尔克P·利特L·内奥韦尤斯J·加斯
Owner TELEFON AB LM ERICSSON (PUBL)
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