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Implementation of On-Off Passive Wireless Surface Acoustic Wave Sensor Using Coding and Switching Techniques
Implementation of On-Off Passive Wireless Surface Acoustic Wave Sensor Using Coding and Switching Techniques
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机译:利用编码和开关技术实现开关式无源无线表面声波传感器
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摘要
Methods and systems for passive wireless surface acoustic wave devices for orthogonal frequency coded devices to implement ON-OFF sensors reusing orthogonal frequency code and distinguishing between ON and OFF states using additional PN sequence and on/off switches producing multi-level coding as well as external stimuli for switching and identification of a closure system. An embodiment adds a level of diversity by adding a dibit to each surface acoustic wave devices, thus providing four different possible coding states. The PN on-off coding can be with the dibit for coding in a multi-tag system.
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