Novel GMSK decoding circuit and decoding method

A technology of decoding circuit and signal conditioning circuit, applied in the field of electronic communication, to achieve the effect of reducing system complexity, high reliability and simple principle

Active Publication Date: 2016-01-06
TIANJIN 712 COMM & BROADCASTING CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention is to solve the problem of how to simplify the GMSK decoding circuit in low-cost simple products, to meet the needs of general communication decoding, and to provide a new GMSK decoding circuit and decoding method to suit different application

Method used

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  • Novel GMSK decoding circuit and decoding method

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Embodiment Construction

[0011] like figure 1 As well as 2 Show, a new GMSK decoding circuit consists of two computing amplifiers and resistance capacitance elements. One of the computing amplifiers N1A and peripheral components form a signal conditioning circuit; the other computing amplifier N1B and peripheral components form a signal decoding circuit.

[0012] First of all, the radio frequency signal modulated by the GMSK modulation becomes the baseband signal of the GMSK -modulated circuit through the system antenna and the frequency regulating demodulation circuit.Fang wave signal.

[0013] The specific circuit connection is: the baseband signal of the GMSK modulation through the connection of the anti -phase input terminal of the capacitance C1, the resistor R1 and the operation amplifier N1A, and the one -end connection of the resistor R2., Connected one end of resistance R4, resistance R6, the other end of the capacitor C2, resistor R3, the other end of the resistor R4 connects the power supply VC...

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Abstract

The invention relates to a signal decoding circuit and method using a GMSK modulation mode. An operational amplifier N1A and a peripheral element form a signal conditioning circuit, an operational amplifier N1B and a peripheral element form a signal decoding circuit. A GMSK modulation radio frequency signal is converted into a GMSK modulation baseband signal by a system antenna and a frequency modulation demodulation circuit, the GMSK modulation baseband signal is input to a GMSK decoding circuit, and the GMSK decoding circuit demodulates and decodes the GMSK baseband signal and outputs a decoded digital square wave signal. The effects are as follows: a complex and expensive digital signal processing circuit is replaced by the universal operational amplifier and a resistance-capacitance device to solve the GMSK decoding problem very economically and smartly, and miniaturization of the decoding circuit is achieved. The application demands of common communication systems can be satisfied, the system complexity and the overall cost are greatly reduced, and the signal decoding circuit and method are very suitable for portable receivers with low costs.

Description

Technical field [0001] The invention involves the field of electronic communications technology, which specializes in a signal decoding circuit and method that uses the GMSK modulation method, that is, a new GMSK decoding circuit and decoding method. The use of the invention circuit can greatly simplify the complexity of the GMSK signal decoding circuit. Background technique [0002] GMSK is that Gaussian minimum frequency shift key control is a digital modulation method commonly used in the communication field, such as the GMSK modulation method used by the GSM system.GMSK can improve the spectrum utilization and communication quality of digital mobile communication.The traditional GMSK modulation signal decoding method mostly uses special chips or digital DSP decoding.The traditional decoding method has stable performance, but the circuit is relatively complex and cost -effective, and it is not suitable for some low -cost simple product applications. Invention content [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/14
CPCH04L27/14
Inventor 程树军
Owner TIANJIN 712 COMM & BROADCASTING CO LTD
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