32results about How to "Meet the delay requirements" patented technology

The invention discloses a superspeed wireless local area network frame polymerization device and a control method thereof. The device comprises a transmitting end and a receiving end, wherein the transmitting end comprises a frame format control unit and a transmitting unit; the receiving end comprises a receiving unit and a control command unit, and the control command unit controls a frame polymerization / segmentation mode and an access mode under different services and comprises an optimal frame format control module and a frame polymerization control command generation module; the optimal frame format control module receives real-time error rate information from the receiving unit, and compares the real-time error rate information with an error rate interval comparison table to select an optimal frame polymerization / segmentation mode and access mode; and according to the optimal frame polymerization / segmentation mode and access mode, the frame polymerization control command generation module generates a frame polymerization / segmentation control command for carrying out frame polymerization / segmentation control on the frame format control unit of the transmitting end. The method and the device provided by the invention can select proper polymerization modes and polymerization frame numbers in real time according to the service type and the error rate situation, and the wireless local area network is enabled to improve the throughput performance while satisfying time delay.

The invention discloses a polar code BP List decoding method. Step 1: select a factor graph set according to the method of factor graph error probability; Step 2: select a factor graph from the factor graph set Z in order to perform BP decoding; Step 3: If the decoding is correct, end the decoding; otherwise, execute step 4; Step 4: If it is the last factor graph, then the decoding fails, and end the decoding; otherwise, execute Step 5; Step 5: According to the current factor graph For the decoding result in the figure, select the two positions with the lowest reliability in the x terminal, that is, select the unreliable position; Step 6: Select the symbol of the unreliable position; Step 7: Update the initial information of the channel, and then go to Step 2 for execution. The method of the invention can not only realize the performance of BP decoding close to that of CASCL8 and meet the requirements of engineering applications, but also the parallel implementation of the invention can effectively reduce the delay of the algorithm and meet the requirement of delay.

The present invention discloses a digital signal fiber transmission triggering system. The system comprises an electric signal-optical signal conversion module and an optical signal-electric signal conversion module which are connected through a fiber connection line; the electric signal-optical signal conversion module has an input end which is taken as the signal input interface of a digital signal fiber transmission triggering system and is configured to receive external digital triggering signals; and the optical signal-electric signal conversion module is configured to convert the digital signals through external input to optical signals, and the optical signal-electric signal conversion module is configured to convert the optical signals to high low-level digital triggering signals and realize opto-couplers isolation and power amplification of the digital triggering signals. The digital signal fiber transmission triggering system is able to overcome the defect of the inductor (or transformer) type isolation anti-interference capability and solve the problem of the common transmission channel of capacitive coupling noise and signals, is low in cost, extensive in applicability, high in reliability and high in carrying load ability and has long-distance fiber transmission signals, etc.

The invention discloses an encoding device and an encoding method. The device comprises a decision device, a parameter register, a check matrix register bank and an encoder, wherein the decision device is used for obtaining parameter information required by the encoding of data according to the service state information and channel state information of the received data; the parameter register is used for storing the parameter information required by the encoding of a service; the check matrix register bank is used for obtaining a check matrix required by the encoding of the service according to the parameter information; and the encoder is used for encoding the received data according to the parameter information and the check matrix, and outputting the encoded data.

The invention relates to an error-prevention limitation method for a three-position switch of an aircraft. A switch limitation structure comprises a limitation knob and a base, wherein a constraint hole is formed at the middle of the limitation knob and is biased towards one side, constraint on a state switching path of the three-position switch is formed due to the position and the shape of the constraint hole, a positioning steel ball of the limitation knob is matched with a round guide rail groove and a ball-socket shaped stop point of the base, the positioning steel ball moves along the guide rail groove on the surface of the base to be stopped at a required stop point by rotating the limitation knob, a state handle only can act in the constraint hole along a constraint direction, and thus, the function of error-prevention limitation is achieved.

This invention discloses a microphone echo elimination device and method, which eliminates echo between microphone and sound circuit, wherein, the device comprises long frame adjust module to combine one self adaptive filter parameter data frame for self adapting filter.

The invention discloses a training method of a voice bandwidth expansion model and a voice bandwidth expansion method, wherein the voice bandwidth expansion method comprises the following steps: acquiring to-be-expanded narrowband voice; calculating an amplitude spectrum and a phase spectrum of the to-be-expanded narrowband voice, and extracting auxiliary characteristics of the to-be-expanded narrowband voice ; processing the amplitude spectrum and the auxiliary characteristics of the to-be-expanded narrowband voice by virtue of the voice bandwidth expansion model which is obtained from training, so that the amplitude spectrum of a reconstructed bandwidth voice high-frequency band can be obtained; conducting mirror image reversing on the phase spectrum of the to-be-expanded narrowband voice in a frequency domain, and determining the phase spectrum of the bandwidth voice high-frequency band; and on the basis of the amplitude spectrum and the phase spectrum of the narrowband voice, and in combination with the amplitude spectrum and the phase spectrum of the reconstructed bandwidth voice high-frequency band, determining a bandwidth voice signal. With the application of the voice bandwidth expansion method provided by the invention, an effect of improving the tone quality and naturalness of the narrowband voice can be achieved.