A Data Separator for Look Receiver Based on Shifted Peak Detection Method

Abstract

The invention discloses a data separator of an OOK (On-Off Keying) receiver based on a shift peak detection method. Firstly, negative shift of a voltage is realized by passing a filtered analog baseband signal through a shifter, then a positive peak of the shifted signal is detected as a judgment level, and finally, a judgment level signal is compared with the analog baseband signal through a comparer to obtain a digital baseband signal, and thus the digital baseband signal is extracted. The data separator specifically and structurally comprises the shifter, a first rail-to-rail operation transconductance amplifier A1, a first P type metal oxide transistor M1, a first capacitor C1, a first resistor R1, a second rail-to-rail operation transconductance amplifier A2 and a second resistor R2. The data separator realizes the characteristic of directly separating the digital signal from the simulation signal, is high in response speed, and is capable of adjusting the judgment level by adjusting the shifted voltage according to a designed requirement, thereby being capable of obtaining an accurate demodulation signal and being high in sensitivity.

Description

technical field [0001] The invention relates to an OOK receiver data separator based on a shift peak detection method, which belongs to the signal modulation technology. Background technique [0002] The on-off keying AM system (OOK) signal is an on-off keying AM signal, which uses on-off at different positions to transmit different information, and the accuracy of the pulse position will determine the final demodulation bit error rate. The information demodulation of wireless communication can be realized by analog circuit or digital circuit. For complex information modulation methods, demodulation is generally implemented in digital circuits; for simple modulation methods such as OOK, analog demodulation has the advantages of simplicity and reliability, but the information obtained from preliminary demodulation is still an analog signal, which needs to be obtained from The digital signal is recovered for processing by the subsequent digital module. Since the information ...

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Problems solved by technology

The average voltage detection method is to obtain the average value of the detection signal as the judgment level by integrating on a large capacitor. It has reliable performance and strong anti-interference ability, but the response speed is slow. When the signal changes suddenly, the detected average value It takes a long time for the response to change; and the way to detect the peak value is to determine the judgment level through the peak detection and the resistor-capacitor network, the response speed is fast, but the reliability is poor, and the comparator has a fuzzy zone of judgment

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