Method using differential transmission and Manchester encoding to enhance backscatter
A backscattering and differential transmission technology, which is applied in the direction of code conversion, electrical components, individual digital conversion, etc., can solve the problems of high bit error rate, short backscattering communication distance, etc., to increase the transmission distance, eliminate interference, interference inhibitory effect
Active Publication Date: 2015-12-23
TAIYUAN UNIV OF TECH
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[0005] In order to solve the problems of short environmental backscattering communication distance and high bit error rate in the transmission process, the present invention provides a method for enhancing backscattering by using differential transmission and Manchester coding
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[0018] A method of enhancing backscatter using differential transmission and Manchester encoding comprising the steps of:
[0019] Build environmental backscatter equipment, including the transmitter and receiver integrated with the power management module, install the antenna on the transmitter as two polarized antennas with orthogonal polarization directions, and install the antennas on the receiver as two Polarized antenna with orthogonal polarization direction, and the polarization direction is consistent with the polarization direction of the polarized antenna of the transmitter. The transmitter adds an inverter on the original basis, and the receiver includes two envelope detectors, one Analog subtractor and a threshold comparator;
[0020] The transmitter and the receiver adjust the impedance matching state first. In the case of impedance matching, energy can be obtained from the TV signal and stored in the capacitor of the power management module in the transmitter and...
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The invention relates to an environmental backscattering method, in particular to a method using differential transmission and Manchester encoding to enhance backscatter. The method comprises the steps that: a transmitter and a receiver are constructed; the transmitter and the receiver store energy when impedances are matched; a signal is subjected to Manchester encoding when the impedances do not match, and the signal is transmitted through the transmitter and is received through the receiver; the receiver passes the received signal through an envelope detector, and then perform subtraction operation on the signal via a simulated subtracter to offset interference of the TV signal; an amplitude value of the signal obtained through subtraction operation is compared with a threshold value via a threshold value comparator, and transmitted information is decoded through a Manchester encoding rule. The method combines the differential transmission method and Manchester encoding method, can enhance environmental backscattering performance maximally, can effectively increase transmission distance by using Manchester codes, has suppression effect on interference in channels by adopting the differential transmission method, and reduces error rate of environmental backscattering.
Description
technical field [0001] The invention relates to an environment backscattering method, in particular to a method for enhancing backscattering by using differential transmission and Manchester coding. Background technique [0002] Since Mark Wiesel formally proposed the concept of Invisible Computing (Invisible Computing), people have been committed to enabling things to be widely interconnected, and to realize the deep integration of people and things through fully intelligent response behaviors, and to this end. A series of research and development work, so as to provide better service experience for human beings. More than 20 years have passed. Although the concept of cyber-physical integration (Cyber-Physical System, CPS) has been widely recognized, and the Internet of Things industry for the connection of everything is also unanimously optimistic, there has not been an explosive large-scale application of the Internet of Things. I have to say The energy problem of IoT no...
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Inventor赵菊敏白瑞琴李灯熬
OwnerTAIYUAN UNIV OF TECH