A high-throughput backscattering fine-grained frequency shift coding method based on FPGA

Abstract

The invention discloses a high-throughput backscattering fine-grained frequency-shift coding method based on FPGA, which is characterized in that the method includes constructing a 32-bit phase accumulator and using Matlab data analysis software to assist in constructing sinusoidal signals of 65536 discrete key-value pairs Registers, fine-grained frequency generation algorithm, step size calculation formula, use improved fractional Fourier transform to decode at the receiving end, so as to obtain the basic frequency of high-throughput coding, and finally realize a communication method with high throughput and low power consumption on the system .

Description

technical field [0001] The invention belongs to the technical field of backscatter communication, and in particular relates to an FPGA-based high-throughput encoding and decoding method. Background technique [0002] Traditional wireless communication technology requires both the sender and the receiver to send wireless signals through the antenna radiating electromagnetic waves, so as to exchange data. [0003] Antenna radiation is the generation of radiated electromagnetic waves by alternating current in wires. The antenna converts the high-frequency current in the circuit into a space electromagnetic wave and emits it; when receiving the electromagnetic wave, it converts the electromagnetic wave from a specific direction in space into a high-frequency current in the circuit. The electromagnetic waves sent by the antenna include frequencies between 9khz and 300,000Ghz. Although this method is easy to implement, it has serious defects in the field of passive IoT. That is,...

AI Technical Summary

Problems solved by technology

The backscatter communication system based on the LoRa signal can continue to work only by obtaining the energy in the environment, but the main disadvantage of the existing design is that the throughput is too low. For example, 1-bit encoding is performed on the packet structure chirp of the LoRa signal, and the throughput is the highest. Only 2.838Kbps, which greatly limits the scalability of system applications

[0005] To sum up: the existing backscattering method can solve the demand for low power consumption in the Internet of Things, but it cannot provide a high-throughput modulation scheme. This problem makes the Internet of Things system only for simple data communication, which restricts the development of networking

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