46results about How to "Guarantee transmission reliability" patented technology

The invention discloses a regional danger early warning system and method for the integration of wireless detection and communication. The cloud wireless network architecture is used to deploy public network or private network authorized frequency band RRU and millimeter wave frequency band RRU, and the public network or private network authorized frequency band and millimeter wave frequency band RRU are reasonably used. Based on the characteristics of the wave frequency band, while detecting the surrounding environment, it uses idle resources to realize high-reliability and large-capacity wireless communication, and feeds back the environmental detection results to the ground monitoring center through the communication function to achieve danger warning and other purposes. The physical layer frame in the authorized frequency band of the public network or private network is used to transmit low-capacity reliable wireless communication data. The millimeter wave frequency band is divided into detection frames and wireless communication frames in time according to requirements, and the millimeter wave frequency band RRU performs environmental detection signals within the detection frame time transmission and reception; RRU in the millimeter wave frequency band transmits large-capacity unreliable communication data within the frame time of wireless communication, and designs a signaling process for data transmission in the uplink and downlink directions that integrates the authorized frequency band of the public network or private network with the millimeter wave frequency band within the frame time of wireless communication .

The invention discloses a polar code-based backscatter communication method, device and system, including: in the code rate detection stage, the backscatter tag performs initial polarization on the information to be sent with cyclic redundancy check bits added After encoding and backscatter modulation, it occurs to the reader; the reader demodulates the received information and decodes the polar code, and feeds back the obtained frozen bit error rate to the backscatter tag; in the redundancy supplementary stage, The backscatter tag reselects the code rate according to the obtained frozen bit error rate, performs polar code encoding and sends it to the reader; the reader demodulates the received information and calculates the log likelihood ratio, and compares the combined two After the information bit is judged by the log likelihood ratio of the stage, the cyclic redundancy check is performed on the judgment result. If the verification is passed, the judgment result is what is required, and the information transmission is completed, so that the transmission can be guaranteed under any channel conditions at the same time. The reliability and code rate are optimal, which greatly increases the communication distance.

The invention discloses a deflection ball conveying mechanism, which relates to the technical field of logistics conveying devices. The invention includes a deflection mechanism and a driving mechanism. The deflection mechanism includes a support frame, and a deflection ball is movably connected to the support frame. There is a gap. The bottom end of the support frame is connected with a swing arm. The swing arm is used to drive the deflection ball to deflect as a whole. The deflection angle is 0‑90°. The driving mechanism includes a transmission shaft. The conical wheel is used to drive the deflection ball to rotate. The invention has the advantages of being not affected by the weight of the cargo, having a large deflection angle and wide application range.

A cable for radio frequency treatment equipment belongs to the technical field of wires and cables for medical equipment. Including the cable core and the outer sheath extruded outside the cable core. The cable core includes network cables, signal transmission lines, inner wrapping layer, power transmission line, intermediate wrapping layer, shielding layer and outer wrapping layer. Network cables and signal transmission lines Accompanying each other, inner fillers and reinforcements are provided in the space between the network cable and the signal transmission line. The network cable, signal transmission line, inner filler and reinforcement are located in the inner wrapping layer, and the power transmission line surrounds the outside of the inner wrapping layer. Arranged in an arc, the middle wrapping layer is wrapped outside the power transmission line, an intermediate filler is provided between the inner and outer wrapping layers, the shielding layer is placed outside the middle wrapping layer, and the outer wrapping layer is wrapped outside the shielding layer. The outer sheath is extruded onto the outer cladding. It meets the transmission requirements for power, network signals and surgical video signals; it has a good soft bending effect and ensures the reliability of signal transmission; it has an ideal elastic recovery effect.