Research And Design Of Low Power Consumption And Anti-Jamming RF Wake-Up Receiver

In recent years,with the integration and innovative application of various wireless communication networking technologies,the smart Internet of Things technology industry has developed rapidly.How to further extend the on-duty working time of Io T nodes and reduce system power consumption has become a new research on the perception layer of the Internet of Things.Hotspots and Difficulties.This thesis adopts the system sleep and wireless wake-up mechanism to reduce the average power consumption of Io T nodes,conducts in-depth research on the RF wake-up system and receiver architecture,focuses on the key technologies of RF wake-up receiver antijamming and low power consumption,and proposes a two-level packet-based The wakeup receiver structure of network detection effectively improves the anti-jamming ability of the radio frequency wake-up receiver and reduces energy consumption through frequency offset,detection reception,square despreading,channel filtering and other technical methods,in order to realize low-power anti-jamming Io T nodes Provided new ideas.The main work of this thesis is as follows:1.Investigated and analyzed the RF wake-up receiver schemes of two types of structures,frequency change and RF tuning,systematically studied the receiver system sleep and RF wake-up working modes,theoretical basis and main indicators,and further studied frequency domain conversion,hardware despreading,Channel filtering and other technical methods to enhance the anti-jamming performance of low-power radio frequency wake-up receivers,and theoretical analysis of technical principles such as radio frequency envelope detection and matched filtering.2.This thesis studies and designs the overall scheme and receiver structure of a lowpower anti-jamming RF wake-up system based on two-stage envelope detection.The application of radio frequency detection and despreading,channel selection filtering and low frequency detection and demodulation to detect and receive wake-up signals can improve the anti-interference ability and realize low power consumption of the system.Theoretical derivation and simulation verification can suppress the in-band interference up to 8 dB.3.Completed the design and implementation of the hardware circuit and software algorithm of the RF wake-up receiver.The hardware circuit design mainly includes functional modules such as low-noise amplification,impedance matching,RF detection,band-pass filtering,low-frequency detection,comparison shaping,and baseband processing.The signal processing adopts lightweight Level low-power FPGA design realizes baseband processing modules such as signal synchronization,matched filtering,sampling judgment,and Manchester decoding.4.A low-power anti-interference wake-up receiver test platform was built,and the function and performance of the receiver were tested and analyzed.The results indicate that the receiver can correctly detect,receive and demodulate the wake-up signal with a signal-to-interference ratio of 2.8 dB,which verifies the wake-up reception Antiinterference ability of the machine.The RF wake-up system receiver researched and designed in this thesis has the advantages of low power consumption,anti-interference,miniaturization,and low cost.Consume the development of wide-area Internet of Things technology industry.