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95results about How to "Reduce surplus" patented technology

Ship radar anti-same-frequency-interference signal processing method based on FPGA

ActiveCN104049242AGuaranteed non-correlation of disturbance parametersThe optimization effect of interference suppression is remarkableRadio wave reradiation/reflectionSignal-to-noise ratio (imaging)Slide window
The invention discloses a ship radar anti-same-frequency-interference signal processing method based on an FPGA. Video echo signals are processed through analog-digital conversion and then subjected to three-pulse staggering time sequence processing, meanwhile, anti-interference variables are superposed, and dynamic synchronous interference asynchronization is achieved; the echo signals processed through synchronous interference asynchronization are subjected to improved three-pulse reverse asynchronous processing; finally, sliding window accumulation is performed on the echo signals subjected to reverse asynchronous processing. Compared with the prior art, the ship radar anti-same-frequency-interference signal processing method based on the FPGA has the advantages that on the basis of a random circuit and mode correction, dynamic staggering of the radar transmission period is achieved through time sequence design; the capacity for detecting small targets and targets in interference units is improved through improved three-pulse reverse asynchronous correlation; through the sliding window accumulation processing, same-frequency interference residues are further reduced, and the signal-to-noise ratio of detection is increased.
Owner:CHINA INFORMATION & ELECTRONICSE DEV HEFEI

Method and system for radio communication with mobile units

The invention concerns a system and a method of radio communication between a plurality of mobile units (6) and a stationary system (1, 3, 12, 14) comprising one or several transmitter units (3), wherein radio communication to one or several mobile units (6) is effected by broadcasting from one of said emitter units (3) on a first, public frequency. The stationary system further comprises a plurality of stationary receiver units (12), said units being connected to a central unit (1) via a common data communication network (14), radio communication from the mobile units (6) being effected by transmitting on a second, public frequency a burst of radio messages (25) that are receivable only by a small number of receiver units (12). From the receiver units (12) the messages are forwarded via the data communication network (14) to the central unit (1), which selects one of the forwarded messages and reads the data contained in the message. The system in accordance with the invention therefore does not require that designated communication paths be established with each communicating unit, and since only a small number of receiver units (12) receive each transmitted message, all messages may be transmitted on the same frequency. Alternative frequencies could however be utilised, for example when longer messages are to be transmitted.
Owner:TRYGGIT

Winch automatic controlling type three-section folding conveyor

The invention discloses a winch automatic controlling type three-section folding conveyor. The winch automatic controlling type three-section folding conveyor comprises three conveying arms, a main portal frame and a winch. The winch automatic controlling type three-section folding conveyor is characterized by further comprising a secondary portal frame I, a secondary portal frame II, a hydraulicoil cylinder, a limiting device I, a limiting device II and a steel wire rope, wherein the conveying arms are all of a trapezoidal truss type structure; the secondary portal frame I is hinged with a hinging hole in the big end of the second conveying arm, and the limiting device I is arranged on the hinging hole; the secondary portal frame II is hinged with a hinging hole in the small end of the second conveying arm, and the limiting device II is arranged on the hinging hole; the winch, the hydraulic oil cylinder and the main portal frame are mounted on a ship body. According to the winch automatic controlling type three-section folding conveyor, the conveying arms are long enough and are upwards turned over to be folded, and moreover, the hydraulic oil cylinder is not used, so that the load of a belt is decreased, the cost is reduced, and the mass of the conveying arms is reduced; the problems such as safety accident caused by forwards-shifted weight due to excessively high mass of the conveying arm can be solved, and thus the safety coefficient is increased.
Owner:CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY

N-channel non-volatile flash memory device and compiling, erasing and reading method thereof

The invention discloses an N-channel non-volatile flash memory device and a compiling, erasing and reading method thereof. The N-channel non-volatile flash memory device includes a P type silicon substrate with an N type doped source end, a drain end and an N channel which are formed therein, and a gate structure which is formed on the substrate and is located between the source end and the drain end and includes a gate oxide layer, a polysilicon floating gate, a first silicon oxide layer, a silicon nitride layer, a second silicon oxide layer and a polysilicon control gate which are distributed sequentially from bottom to top, wherein the polysilicon floating gate is used for storing charges. According to the flash memory device provided by the invention, a low-power consumption band-to-band-tunneling hot-hole injection compiling and channel FN electron tunneling erasing method is adopted, and therefore, the problem of high consumption of original channel hot electron injection programming can be solved, and a traditional floating gate transistor structure can have a smaller gate length, and the problem of erasure saturation which cannot be solved by a traditional p-channel B4-Flash can be solved, and the N-channel non-volatile flash memory device can be manufactured more easily.
Owner:SHANGHAI HUALI MICROELECTRONICS CORP
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