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3 results about "Delay encoding" patented technology
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In telecommunications, delay encoding is the encoding of binary data to form a two-level signal where a "0" causes no change of signal level unless it is followed by another "0" in which case a transition to the other level takes place at the end of the first bit period; and a "1" causes a transition from one level to the other in the middle of the bit period. Delay encoding is used primarily for encoding radio signals because the frequency spectrum of the encoded signal contains less low-frequency energy than a conventional non-return-to-zero signal and less high-frequency energy than a biphase signal. Delay encoding is an encoding using only half the bandwidth for biphase encoding but features all the advantages of biphase encoding: To be rewritten: It is guaranteed to have transitions every other bit, meaning that decoding systems can adjust their clock/DC threshold continuously. One drawback is human readability. Delay encoding is also known as Miller encoding. <US Pat. # 3,108,261> Some RFID cards, in particular EPC UHF Gen 2 RF cards, use a variant called "Miller sub-carrier coding".
A low-delay optical fiber time-frequency synchronization method, device and storage medium
The application discloses a low-delay optical fiber time-frequency synchronization method and device and a storage medium, which are used for reducing errors in a transmission process of a long-distance optical fiber. A PPS reference data packet and an optical fiber delay data packet are generated; the PPS reference data packet and the initial optical fiber delay data packet are input into a first slave station; the PPS reference data packet and the initial optical fiber delay data are site-encoded by the first slave station; after a response delay, the site-encoded PPS reference data packet and the initial optical fiber delay data are transmitted to a master station; the optical fiber delay data packet is subjected to first optical port optical fiber segment delay encoding according to a loopback total delay and the response delay; the PPS reference data packet and the optical fiber delay data packet subjected to the optical fiber segment delay encoding are transmitted to the first slave station through the first optical port; the first slave station is subjected to master station original PPS recovery by using the PPS reference data packet, and the first slave station is subjected to phase shift processing by using the optical fiber delay data packet subjected to the optical fiber segment delay encoding.
Owner:SICHUAN TAIFU GROUND BEIDOU TECH CO LTD
Image reconstruction method and system based on pulse memory autoencoder
The application belongs to the field of pulse neural network and image reconstruction, and discloses an image reconstruction method and system based on a pulse memory autoencoder. The pulse memory autoencoder comprises an encoder, a memory network and a decoder. An input image is obtained, the input image is converted into a pulse sequence by using delay coding, and the pulse sequence is input into the encoder to obtain corresponding pulse features. The pulse features are input into the memory network to obtain corresponding memory features. In the recall stage, the pulse features are only transmitted to the perception neuron, the response neuron is activated by the synaptic connection learned by the perception neuron in the memory stage, and the memory features are output to the decoder to generate a corresponding reconstructed image. The application can enhance the maintenance capability of the potential representation and complete high-quality image reconstruction while maintaining a low pulse overhead.
Owner:ZHEJIANG UNIV OF TECH
A low-delay optical fiber time-frequency synchronization method, device and storage medium
This application discloses a low-latency optical fiber time-frequency synchronization method, apparatus, and storage medium for reducing errors during long-distance optical fiber transmission. The method involves: generating a PPS reference data packet and an optical fiber delay data packet; inputting the PPS reference data packet and the initial optical fiber delay data packet into a primary slave station; performing site encoding on the PPS reference data packet and the initial optical fiber delay data packet through the primary slave station; transmitting the site-encoded PPS reference data packet and the initial optical fiber delay data packet to the master station after a response delay; performing optical segment delay encoding on the optical fiber delay data packet using the first optical port based on the total loopback delay and the response delay; transmitting the PPS reference data packet and the optical segment delay-encoded optical fiber delay data packet to the primary slave station through the first optical port; using the PPS reference data packet to recover the original PPS from the master station at the primary slave station, and performing phase shifting processing on the primary slave station using the optical segment delay-encoded optical fiber delay data packet.
Owner:SICHUAN TAIFU GROUND BEIDOU TECH CO LTD