34results about How to "Solve the speed bottleneck" patented technology

The invention discloses a high-speed intermediate-infrared laser space communication system and a communication method. The system comprises a first laser device, a near-infrared high-speed electrooptical modulator, an optical parameter difference frequency device and a transmitting antenna which are connected sequentially, a second laser device connected with the optical parameter difference frequency device, a receiving antenna, an optical parameter sum frequency device, a near-infrared high-speed photodetector and a high-speed electrical signal processing unit which are connected sequentially, and a third laser device connected with the optical parameter sum frequency device, wherein the near-infrared high-speed electrooptical modulator is connected with the high-speed electrical signal processing unit; the optical wave frequency generated by the first laser device is omega p1; the optical wave frequency generated by the second laser device is omega s1; and the optical wave frequency generated by the third laser device is omega p2. According to the system and the method, restriction of immaturity of a high-speed intermediate-infrared communication device to an intermediate-infrared laser space communication rate is avoided, and space communication transmission and processing of high-speed (tens to hundreds of Gbits / s) and high-capacity optical information can be achieved.

The invention relates to an ultra-high-speed system for realizing the SM4 algorithm, including a control module, a cryptographic expansion / encryption / decryption module, an encryption / decryption module, a decryption / encryption module, a data splitter, a cryptographic expansion / encryption / decryption selector, and a round encryption / result splitter and result selector, the present invention solves the problem of low speed caused by having to wait for 32 round keys to be calculated before encryption in the existing hardware system, and the processing speed can reach Nearly twice that of the existing hardware system; based on the idea of ​​module reuse, the present invention realizes the synchronous encryption / decryption operation of three groups of tasks, solves the problem that the decryption module is idle during frequent encryption tasks in the traditional design, and effectively improves The utilization rate and operation speed of the system are improved, and the processing speed is three times that of single-task operation when the key is not changed in multi-task operation, and the fastest is six times that of the existing hardware system.

The invention provides an FPGA based IPv6 data packet high-speed processing device and an operational method thereof, and belongs to the technical field of transceiving processing of the data packet. The device comprises a microprocessor interface module, an IPv6 data packet encapsulating transmission module, an IPv6 data packet decapsulation analysis module, an Ethernet MAC controller module, anSRAM controller module and a user interactive module, wherein the microprocessor interface module is connected with an external microprocessor, the IPv6 data packet encapsulating transmission module,the IPv6 data packet decapsulation analysis module, the SRAM controller module and the user interactive module respectively; and the IPv6 data packet encapsulating transmission module and the IPv6 data packet decapsulation analysis module are connected with the Ethernet MAC controller module respectively. The device has the advantages that: the IPv6 is fully supported, the speed of processing thenetwork data is greatly improved, the modularization design is adopted, and various microprocessors or bus interfaces are adapted only by modifying the microprocessor interface module, so that the device is high in expansibility, versatility and flexibility.

The invention relates to a data processing method and a device. Program codes running on a serially connected multiprocessor nuclear structure are partitioned according to specific rules, so that the serially connected multiprocessor nuclear structure forms a serial multi-emitting and production line layered structure, and the time required for running corresponding code fragments obtained by partitioning on each nucleus is equal as much as possible, thereby realizing the load balance of internuclear workload.

The invention discloses a space laser communication forwarding system based on a passive optical switch. The system consists of a ground optical signal transmitting terminal, a space forwarding system and a ground optical signal receiving terminal. A transmitting end and a receiving end for space optical communications are placed on the ground, and the space forwarding system is carried by an aircraft and only forwards optical signals without processing such as amplification, modulation, demodulation and the like, so that the complexity of a space system is lowered greatly, and the sizes, weights and power consumption of space loads are lowered. Moreover, point-to-point or broadcasting-mode forwarding of the optical signals is realized through an optical switching system. The signals are modulated on the transmitting end, and demodulated on the receiving end, so that ground-space-ground forwarding communications are realized.

The embodiment of the invention discloses a data input method based on OBD equipment, relates to the technical field of high-concurrency data processing, and can ensure timeliness of the real-time monitoring process of the OBD equipment and ease data congestion. The data input method based on the OBD equipment comprises the steps that data transmitted to a server by the OBD equipment according to a UDP / IP protocol are received by the server; the received data are taken out of a memory queue through the multi-service processing thread, the header of the received data is parsed, uplink entities are correspondingly generated according to the key words of the header, and the uplink entities are added to an uplink entity queue; downlink entities are generated according to the processing result of the uplink entity queue and pressed in a downlink entity queue, downlink messages are generated according to the downlink entities, and the downlink messages are added to a downlink information queue; and downlink information is issued to the OBD equipment according to the downlink information queue. The data input method based on the OBD equipment is suitable for data interaction with the OBD equipment.

The invention discloses a design method of an LDPC (Low-Density Parity-Check Code) decoder compatible with a DVB-S2X standard, which mainly solves the problem of long iteration time of a decoder in an existing system. The design method of the LDPC decoder compatible with the DVB-S2X standard comprises the implementing steps of 1, designing a data buffer, converting input single-path data into 360-path parallel data after the input single-path data are subjected to sequence adjustment, buffering the 360-path parallel data and carrying out decoding initiation for the data; 2, designing a first barrel-shaped shifting module, shifting the 360-path data after variable node updating and carrying out check node updating; 3, designing a second barrel-shaped shifting module, and shifting the 360-path data after the check node updating is finished and then carrying out variable node updating; 4, after the number of decoding iterations reaches to the set maximum number of iterations, calculating hard decision information for the 360-path data; and 5, after the hard decision information is subjected to the decoding decision, outputting the hard decision information in sequence so as to finish the decoding. According to the design method of the LDPC decoder compatible with the DVB-S2X standard, the iteration time of the LDPC decoder is reduced, and the throughput of the decoder is increased by one time.

The invention provides a method for directly assigning and displaying true three-dimensional simulation regions. The method comprises the following steps of: directly connecting a storage unit of a three-dimensional visual image storage with a display storage region of each projector, which is divided in advance, and carrying out assignment control by a synchronous signal; simultaneously assigning all the display storage regions which are divided in advance by contents which are stored in the three-dimensional visual image storage and respectively correspond to the display storage region of each projector according to the synchronous signal; and after completing assigning the display storage regions of all the projectors, synchronously controlling and displaying to realize rapid and synchronous display of a plurality of projectors. By the method, on-line assignment and image calling of the divided display regions are realized by hardware, rapid and synchronous display of a plurality of projectors is reliably realized and the problem of the speed bottleneck of a method for performing simulation by a software method is solved.