311 results about "Frame synchronization" patented technology

The invention provides an AI-based nuclear power station high-risk operation compliance real-time monitoring method and system, and the method comprises the steps: processing human body joint point coordinate data of an operator through employing an AI dynamic contour modeling algorithm, and generating a limb movement track sequence; scanning the preset operation area to generate a relative motion vector between the special operation tool for the nuclear power station and the operator; detecting an action deviation mode of the operator based on the limb movement track sequence, and generating a detection result; fusing the relative motion vector and multi-channel video stream frame synchronization data obtained by applying an AI video analysis algorithm to generate a space intrusion relation between the nuclear power station special operation tool and the nuclear power station high-risk equipment; and when the action deviation mode exists in the detection result and the space intrusion relation exceeds a preset safety threshold, generating an operation compliance signal. According to the invention, real-time dynamic evaluation of human motion compliance and tool equipment safety distance in the high-risk operation process of the nuclear power station is realized, and the safety monitoring precision and real-time early warning capability of high-risk operation are improved.

The invention relates to the technical field of intelligent monitoring, in particular to a multi-thread low-power-consumption intelligent monitoring system based on an AI processor. The method has the advantages that aiming at the problems of unbalanced computing power and power consumption, high multi-task processing delay and strong hardware dependence in the prior art, the NPU module of the RK3588 processor is combined with the INT8 quantitative model, so that the power consumption is lower than 10W under the 6TOPS computing power; a dynamic multi-thread scheduling mechanism is designed, parallel processing of more than eight paths of video streams is supported through binding of a priority queue and an NPU core, and end-to-end delay is compressed to be within 200 ms; a zero-copy video stream architecture is constructed, data transfer is eliminated through memory mapping, and preprocessing time consumption is reduced by 90%; an energy efficiency control module is integrated, the NPU voltage frequency is dynamically adjusted according to the load, and the energy efficiency ratio reaches 0.83 TOPS / W; space-time alignment of multi-model reasoning results is realized by adopting a frame ID synchronization technology, and the mismatching rate is lower than 0.1%.

The invention provides a multi-antenna MIMO architecture synchronization method and device, a program product and a storage medium, and relates to the technical field of wireless communication. Receiving sampling signals through a plurality of receiving channels; performing down-sampling on each sampling signal to obtain a down-sampling signal; determining a plurality of cache regions to store each downsampling signal, and performing cross-correlation operation on each downsampling signal and a local synchronous time domain signal; when any receiving channel detects an effective peak value, determining the position of the effective peak value as a preliminary synchronization position; determining a corresponding search window range, and performing weighted stacking on the target cross-correlation results to obtain an overall correlation peak value; searching a maximum value in all the total correlation peak values, and determining a position corresponding to the maximum value as a final synchronization position; and calculating a frequency offset estimation value of each receiving channel according to each pilot signal, and carrying out weighted average on each frequency offset estimation value to obtain a final frequency offset estimation value. By adopting the method, the wireless frame synchronization precision can be improved.

The invention discloses a lightweight high-speed photographing system and method based on an event camera, and the system comprises a hybrid imaging module which is used for synchronously collecting the image data and event data of a scene, and comprises a visible light camera and an event camera; the hardware synchronization module is electrically connected with the visible light camera and the event camera, and is used for receiving a frame synchronization signal of the visible light camera and sending a trigger signal to the event camera, so that the event camera inserts a time stamp corresponding to a visible light image frame exposure moment in an event stream; the data processing and fusion unit is in communication connection with the hybrid imaging module and is used for receiving the image data and the event data and executing the following steps: performing time alignment on an event stream and a visible light image frame stream based on a time stamp; operating a high-frequency frame insertion reconstruction algorithm, and reconstructing a multi-frame intermediate image by using event stream data between two frames; synthesizing the original visible light image frame and the reconstructed intermediate image into a high-frame-rate video stream; and the power supply and interface module is used for supplying power to the system and outputting a high-frame-rate video stream.

The invention discloses an electronic outside rear-view mirror image optimization display method based on environment perception and an electronic rear-view mirror, and belongs to the technical field of electronic rear-view mirrors. The method comprises the steps that environment information of a vehicle and state information of the vehicle are collected in real time, marking the same time reference on the image frame of the electronic rearview mirror and the collected data, and constructing to obtain a frame synchronization environment vector; carrying out multi-modal evidence fusion based on the frame synchronization environment vector, forming probabilistic judgment on an environment state, and obtaining a final state decision; using a parameter smooth transition model to calculate according to a state decision result to obtain a final optimization parameter set; and the final optimization parameter set is issued to a DSP chip, and the DSP chip generates a finally presented optimized electronic rearview mirror image. According to the method, the accuracy and robustness of electronic outside rear-view mirror image optimization are effectively improved.

The invention discloses an intelligent diagnosis method for power equipment primitive state recognition and rule fusion, and relates to the technical field of power system dispatching automation. The method is used for substation dispatching master station monitoring picture equipment primitive state recognition and abnormity diagnosis, video and graph model library data acquisition, preprocessing denoising, frame synchronization and ROI extraction. Using the improved YOLOv8-Tiny to extract a multi-modal feature to identify a primitive state; establishing an expert experience rule base, a graph-model association rule base and an anomaly judgment rule base; performing primary diagnosis on the forward chain reasoning fusion rule; performing cross checking on telecommand consistency, telemetering relevance and graph model library integrity; and outputting a result coexistence log. The problems that manual checking is low in efficiency and prone to omission are solved, the reliability of primitive recognition and correlation checking is improved, a D5000 system and a domestic operating system are adapted, complex monitoring scenes are coped, the operation and maintenance burden is relieved, it is guaranteed that monitoring pictures of a dispatching master station are accurate, and safe operation and maintenance of a power grid are facilitated.

The invention provides an LED constant-current driving chip and a display system, and relates to the field of display. The LED constant current driving chip comprises a line feed signal generation module, a display data cache module, a display control module and a constant current driving module. The line feed signal generation module is used for resetting in response to the received frame synchronization signal, and counting or timing based on the frame synchronization signal and a line feed period so as to periodically output a line feed signal; the display data caching module is used for caching the input display data; the display control module is used for generating a PWM (Pulse Width Modulation) signal according to the line feed signal and the display data read from the display data cache module; and the constant current driving module outputs a constant current driving signal based on the PWM signal so as to drive a corresponding LED lamp bead to emit light. The LED constant-current driving chip provided by the invention can output the line feed signal under the condition of no ROW line, so that the wiring is simplified, and the port utilization rate is improved.

The invention discloses an LED driving chip and a display driving structure, and relates to the technical field of LED display driving, the LED driving chip is any one of a plurality of LED driving chips cascaded through a data signal line, and the plurality of LED driving chips transmit a frame of data sequence step by step through the data signal line; the LED driving chip extracts the address ADDR from the received data sequence, and performs frame change when the count value of the internal count reaches Z-ADDR; wherein the address of the later-stage LED driving chip is obtained by adding 1 to the address of the previous-stage LED driving chip and then transmitting the data sequence, and the addresses are transmitted according to the sequence of address bits from low to high. When a single-line cascade scheme is applied to the LED driving chip, frame changing synchronization of the multiple LED driving chips can be achieved, the wiring space is saved, the display permeability can be improved, and the LED driving chip has the advantage of being small in frame changing delay.

The invention discloses a projector remote control system based on the Internet of Things, and relates to the technical field of remote control of the Internet of Things, and the projector remote control system comprises a time frequency audit baseline module, a coupling feature analysis module, a causal tracking calibration module, a multi-time-scale registration module and a regulation and control dance editing module. Video sampling rates, frame phase sequences and power waveform changes of a plurality of projectors are collected under a unified time reference, a global coupling tensor is generated, and a drift map is constructed and used for forming a system-level synchronous reference. According to the method, collaborative optimization of multiple projectors in the aspects of picture consistency, electromagnetic interference suppression and remote communication stability is realized through cross-device time-frequency auditing, coupling feature analysis, causal tracking, multi-time-scale registration, dynamic regulation and control frame synchronization and energy release.

The invention discloses a multi-granularity data cascade updating method and device based on a dynamic topological graph and a medium, and relates to the technical field of data processing. The method maintains a multi-level data dependency model (DAG) in memory. The system recursively updates a target node by monitoring the change of a source node and utilizing an incremental propagation algorithm. For a high-concurrency scene needing isolation verification, the method introduces an overlay shadow topology mechanism: on the premise of not destroying a main graph structure and not copying a total graph, only instantiating a shadow copy of an affected node based on a Context ID, and constructing an overlay Mapping pointing to a father node; when the propagation path is calculated, the numerical value of the shadow node is preferentially read based on the context, and the propagation path of the original node is logically blocked in the current context. The invention further provides a path convergence mechanism and rendering frame synchronization technology based on topology in-degree, and the problems of resource competition, data consistency and front-end rendering flicker under the complex dependence network are effectively solved.

The invention discloses a double-flow image transmission system and method based on a high-speed SerDes interface, and belongs to the technical field of high-speed image transmission, the system comprises a sending end and a receiving end, an image source A and an image source B of the sending end do not need DDR cache synchronization, and image frames are segmented, interleaved and packaged through a dynamic time slice distribution mechanism and then sent to a single high-speed SerDes channel; and a receiving end collects data and then de-interleaves and recombines the recovered image. The data encapsulation comprises a frame synchronization head, a block synchronization head and the like for identification, the dynamic time slice distribution mechanism alternately or independently sends image blocks according to the image preparation condition, and the image adopts a double-cache mechanism to avoid data coverage. The method improves the channel bandwidth utilization rate, saves hardware resources, is good in compatibility, supports various data stream combinations, reduces frame delay, and is suitable for single-channel multi-stream and multi-channel multi-stream transmission.

The invention discloses an asynchronous space and time warping rendering system for XR equipment. The asynchronous space and time warping rendering system comprises an attitude prediction module, an asynchronous warping processing module, a synthesis and output module and a monitoring and feedback module. According to the method, space warping and time warping are decoupled from a main rendering thread, an independent asynchronous warping processing assembly line is constructed, interference of warping calculation on main rendering performance can be effectively isolated, and the stability of an application rendering frame rate is ensured; according to the system, through dynamic monitoring of rendering load and prediction precision, distortion parameters and execution strategies are adaptively adjusted, and on the premise of ensuring visual quality, perception delay can be significantly reduced and frame rate output can be smoothed; according to the method, a layered buffering and synthesizing mechanism is adopted, the problem of inter-frame asynchronization or tearing possibly caused by asynchronous execution is reduced, image coherence and visual comfort in a high-dynamic motion scene are improved, and meanwhile the overall utilization rate of graphic processing hardware is increased.

The invention discloses a TFDM-PON uplink transmission system and OLT equipment, and relates to the technical field of optical access networks, and the OLT equipment comprises a coherent receiver which is used for converting a received signal into a first electric signal; the analog-to-digital converter is used for sampling the first electric signal; the first digital signal processor is used for processing the sampled burst frame, the burst frame comprises a lead code, and the lead code comprises a training sequence segment TS-B; the first digital signal processor is configured to calculate the conjugate correlation of the two segments of sequences by using the [S, S] structure of TS-B, and locate the initial position of a burst frame to perform frame synchronization; calculating a power distribution ratio and a relative phase difference of a received signal in two polarization states by using a signal borne by a [S, S] structure of TS-B, and executing maximum-ratio polarization combination; and calculating the initialization coefficient of the equalizer by using the signal sent by the ONU equipment and the received signal subjected to frame synchronization and polarization combination. The invention can shorten the length of the lead code to improve the transmission efficiency.

The invention discloses a satellite Internet of Things uplink signal detection method and a satellite Internet of Things uplink signal detection system, which integrate traditional signal processing and advanced spiking neural network technologies, realize high-precision frame synchronization by performing two-dimensional cross-correlation matching in a time-frequency domain, and perform low-power-consumption and high-robustness symbol judgment by using an event-driven spiking neural network. Compared with a traditional method based on FFT or matched filtering, the method has higher adaptability and detection performance in a satellite Internet of Things scene with large Doppler frequency shift, low signal-to-noise ratio and dense users.

The embodiment of the invention provides a signal tracking method and device, electronic equipment and a storage medium, and belongs to the technical field of satellite navigation. The method comprises the following steps: determining a reference parameter of a first tracking channel according to a captured to-be-processed signal; synchronizing the reference parameter to a second tracking channel; controlling the first tracking channel and the second tracking channel to perform coherent integration and non-coherent accumulation based on the reference parameters respectively to obtain a first accumulation result and a second accumulation result; and under the condition that the effective accumulation result does not exist, according to the integral result of the coherent integral of the first tracking channel, respectively updating the carrier loop and the code loop of the BPSK signal to obtain an updated reference parameter, and returning to execute the step of synchronizing the reference parameter to the second tracking channel until the effective accumulation result is detected to exist. And generating a to-be-frame-synchronized message based on the effective accumulation result. According to the invention, stable tracking requirements of BPSK and MCSK signals can be compatible.

A half-duplex data communication system, comprising a first communication device and a second communication device, wherein the first communication device is connected to the second communication device by means of a communication link. The first communication device sends a first signal to the second communication device; the second communication device sends a second signal to the first communication device; the first signal comprises a synchronization frame; the second communication device recovers a data frame synchronization signal on the basis of the received synchronization frame; the second communication device communicates with a peripheral device on the basis of the data frame synchronization signal; a local clock generation module in the second communication device generates a local clock of the second communication device; the clock for sending the second signal by the second communication device is the local clock of the second communication device; and the first signal and the second signal are transmitted on the communication link in a time-division manner.

The embodiment of the invention provides a frame synchronization method and device based on a WI FI system, and the method comprises the steps: carrying out the delay self-correlation of a short training sequence of a main channel and a secondary channel, carrying out the bandwidth detection of a current WI FI frame according to the delay self-correlation result of the main channel and the secondary channel, and when the bandwidth detection result of the current WI FI frame is greater than a specified bandwidth, carrying out the bandwidth synchronization of the current WI FI frame. And coarse synchronization is carried out according to a delay self-correlation result of the main channel and the secondary channel to obtain long training sequences of the main channel and the secondary channel, and a correlation peak is searched for a cross-correlation result of the long training sequences of the main channel and the secondary channel and a long training sequence of a local sequence to carry out fine synchronization so as to determine a symbol boundary of the current WIFI frame. According to the method and the device, the problems that only a main 20M channel is used, other channels are not used, and timing errors are deteriorated due to the length of the PPDU are solved, and the effects of improving the frame synchronization precision of the WI FI system and reducing the error code probability caused by the overlong length of the PPDU are achieved.

The embodiments of the present application belong to the technical field of human-computer interaction. Disclosed are a skill indicator display method and apparatus, and a device, a medium and a program product. The method comprises: receiving a trigger operation on a target skill control, wherein the target skill control is used for controlling a virtual object to cast a target skill (610); when the virtual object is moving, displaying a skill indicator for the target skill on the basis of a rendered position of the virtual object, wherein the rendered position is the position used by a client to render the virtual object, and the skill indicator is used for indicating the skill effect range for after the target skill is cast (620); and when the virtual object is stationary, and on the basis of a logical position of the virtual object, displaying the skill indicator for the target skill, wherein the logical position is the position of the virtual object that is carried when a server and the client execute frame synchronization, and the refresh rate of the rendered position is higher than the refresh rate of the logical position (630).

This application relates to the field of monitoring data processing technology, and particularly to a method, device, and storage medium for preventing monitoring data from being tampered with. The method includes: during the recording of monitoring data, simultaneously acquiring a thermal noise segment from an imaging sensor for each video frame, reducing equipment costs and deployment difficulty; calculating the image activity metric of the video frame and the noise energy metric of the thermal noise segment, requiring minimal computation and meeting the simple real-time needs of ordinary monitoring equipment; performing an arithmetic combination of the image activity metric and the noise energy metric to obtain a frame verification feature value, which is then associated with and stored with the video frame, making it difficult to forge and having low storage overhead; acquiring the video frame to be verified and generating a verification feature value based on the video frame; determining that the monitoring data has been tampered with when the deviation between the verification feature value and the stored verification feature value exceeds a preset range, thus achieving low-cost, low-complexity, and high-real-time monitoring data integrity protection.

The present application relates to the technical field of audio and video synchronization processing, more particularly to an audio and video synchronization method and system based on TS stream and a storage medium. The method comprises reading TS stream data frames and unpacking the TS stream data frames; a synchronization device acquires and calculates the difference between the PTS of the current frame and the previous frame, determines whether the difference is a TS abnormal data type; when the difference is a TS abnormal data type, the synchronization device further determines the type of the current frame; if the type of the current frame is a video frame, the synchronization device discards the current frame; if the type of the current frame is an audio frame, the synchronization device adjusts the offset value and determines whether the current frame is subjected to decoding processing; if the current frame is subjected to decoding processing, a transcoder performs decoding processing. The present application realizes normal transcoding and audio and video synchronization by offset detection and correction error avoidance stream.

The present application relates to the field of artificial intelligence technology and early warning analysis, in particular to an engineering machinery identification and safety risk early warning method based on continuous learning, comprising: collecting optical cable line video, environmental parameters and positioning data for frame synchronization alignment to build an initial identification model; the edge side preliminarily screens suspected targets and uploads to the cloud; the cloud accurately identifies the mechanical category, working state and confidence, combines the positioning data to build multi-modal risk judgment features; based on compliance verification and distance determination to determine the risk level, generate graded early warning and work order; based on operation and maintenance feedback to screen difficult samples, update the model through incremental training and synchronize to the edge side, realize the continuous iteration of the identification model, balance real-time and accuracy, reduce the false positive rate, and improve the automation level of optical cable inspection.

The invention relates to a method for frame synchronization for a digital receive signal, which is received at an output of a transmission channel as a consequence of a binary digital transmit signal supplied to an input of the transmission channel, wherein the binary digital transmit signal contains information to be transmitted in a data packet which has a predetermined number D of data symbols in a data section and a predetermined number S of synchronization symbols in an optional synchronization section, and wherein the binary digital transmit signal has a predetermined symbol rate, wherein the digital receive signal is represented by a sequence of digital samples and wherein a sampling frequency is used which is greater than or equal to the symbol rate.According to the invention, a sliding window is defined which has a temporal length corresponding to the temporal length of a data packet or a data segment of a data packet. At each position µ of the sliding window, a sample value is assigned to each symbol segment of the data segment and optionally to each symbol segment of the synchronization segment of the sliding window. For each position µ of the sliding window, a position value Λ is determined using a predefined metric. met[µ] is determined, using at least the sampled values ​​assigned to the symbol segments of the data segment. The metric is based on the use of a model for the transmission channel, which assumes a memory-free transmission channel and in which the digital received signal is described by a conditional probability density function for each of the possible binary values ​​of the transmitted signal. From the initial time of the sliding window in a position for which the position values ​​Λ met assume a maximum or for which the position value Λ met If a predetermined threshold is exceeded, a start time of a data packet in the digital received signal is determined. The invention further relates to a device and a computer program for implementing the method.

The invention is applicable to the technical field of computers, and provides an MIPI (Mobile Industry Processor Interface) multi-channel switching method, device and equipment and a storage medium, the method comprises the following steps: receiving MIPI multi-channel composite data input by a camera, analyzing the multi-channel composite data into independent multi-channel data, and obtaining a frame synchronization signal of each channel; determining a target channel with the highest current priority according to a preset switching parameter, and generating a switching instruction corresponding to the target channel with the highest current priority; according to the switching instruction, a target channel is opened, data transmission is carried out through the target channel, and other channels are closed; processing the channel data according to frames; when it is detected that the current frame data transmission is completed, the next target channel with the highest priority is determined according to the switching parameter, the switching instruction corresponding to the next target channel with the highest priority is generated, and channel data processing is continued, so that the problems that the occupied memory resources are too large, the hardware cost is increased, and the processing efficiency is high are solved. And the multi-channel switching flexibility is insufficient.

The invention relates to a power line carrier multi-user communication method. The method comprises the following steps: dividing each leaf node into a plurality of target groups based on a power line channel measurement result, and carrying out frequency domain resource allocation on each leaf node of each target group; and then sending a multi-user transmission request frame to each target group through periodic broadcast, and finally receiving uplink data frames sent by each leaf node of each target group in parallel in the allocated frequency domain resources. According to the embodiment of the invention, through frequency domain resource allocation, each leaf node sends data in parallel, on one hand, frame synchronization and frame waiting time are reduced, and time domain resource waste is avoided; and on the other hand, based on frequency domain distribution of channel measurement, spectrum resources can be utilized to the maximum extent, and the leaf nodes in the same target group jointly occupy the channel, so that the transmission rate is improved.

The invention discloses a page rendering method and device, a readable medium, electronic equipment and a program product. The method comprises the following steps: in response to a first frame synchronization signal triggered by a first page, determining a decoding strategy corresponding to a first image at least based on a display container and a display position of the first image under the condition that the first page comprises an undecoded first image; under the condition that the decoding strategy corresponding to the first image represents that the first image is decoded, the first image is decoded, first decoding content corresponding to the first image is obtained, and the first decoding content is used for rendering the first image in the first page. The problem that CPU threads are frequently switched due to the fact that decoding tasks are initiated for all images is avoided, performance loss and memory occupation are reduced, and then the interaction experience of a user is improved.

The invention relates to a satellite-borne fluorescence hyper-spectral detector electronics system with high integration level and high signal-to-noise ratio. A signal processing module is used for controlling the working mode of a detector; receiving a second pulse signal of a satellite GPS subsystem to generate a time count of a frame synchronization signal; carrying out extremely low noise quantization on an analog signal transmitted by the focal plane driving unit; the image data and the auxiliary data are coded and integrated and then sent to a satellite data transmission subsystem; a global clock and a global reset signal are generated and sent to the sequential control unit; the time sequence control unit generates a frame synchronization signal and a clock synchronization signal, and generates a driving time sequence signal of a CCD in the focal plane driving unit; the focal plane driving unit generates various bias voltages required by the work of the CCD; receiving a driving time sequence signal to generate various high-voltage driving signals required by the work of a CCD (Charge Coupled Device); and the CCD output analog signal is output to the signal processing unit after being subjected to power amplification and impedance matching. The signal-to-noise ratio of the system is improved, and the size, weight and power consumption of imaging electronics of the detector are reduced.

The invention discloses a non-cooperative star chain signal matching identification method combined with known satellite constellation signal measurement, and solves the problem of non-cooperative star chain signal matching identification when the position of a receiver is unknown and the receiver cannot depend on frame synchronization and demodulation information. And the technical problems of fuzzy star chain carrier frequency and difficulty in real-time identification in a dynamic scene are solved. The method comprises the following implementation steps: establishing a measurement data set; constructing a receiver speed resolving equation set; generating a non-cooperative star chain signal matching test equation set; generating a receiver speed candidate set; screening a receiver speed candidate set; determining a probability speed; and obtaining a matching identification result. According to the method, the satellite with the known identity and the intercepted signal of the satellite are used for assisting non-cooperative star chain signal matching recognition, real-time matching recognition of the moving platform under the carrier frequency fuzzy condition of the non-cooperative star chain satellite can be achieved, calculation complexity is linearly controllable, the method does not depend on the real position of a receiver, and reliability is high. The method can be used for receiver navigation and positioning based on non-cooperative star chain signals.

The application discloses an anti-interference frame synchronization method in high-speed frequency hopping communication, equipment and medium, the anti-interference frame synchronization method in high-speed frequency hopping communication includes: combining interference detection based on communication receiving end and single synchronization pulse correlation value multi-feature joint decision, constantly interference detection is carried out to receiving end synchronization pulse signal, and the position of interference point is marked, according to the number of non-interference marked points in synchronization pulse and the synchronization correlation value calculated from non-interference marked points and the threshold value set, multi-feature joint decision is carried out, to carry out error correction processing to the correlation value of current pulse, and the accumulation of multiple synchronization pulse correlation values, by setting reasonable threshold, the correct frame synchronization position is finally detected. The application can be in the case where interference exists, through interference detection and single pulse correlation value multi-feature joint decision technology, can realize the great improvement of anti-interference frame synchronization performance under the premise of not increasing additional resources.

A satellite-borne modulation platform single particle protection method based on multi-level frame synchronization detection comprises a multi-level frame synchronization detection module which is used for receiving a first-level data frame data stream output by a scrambling module, judging whether frame out-of-step occurs or not, generating a reset signal to a receiving module, a coding module and the scrambling module when judging that the frame out-of-step occurs, and outputting the reset signal to the receiving module, the coding module and the scrambling module; and resetting the receiving module, the coding module and the scrambling module. The active, stable and reliable single-particle protection method is provided for a satellite-borne modulation platform, and satellite-ground link lock loss caused by single-particle faults can be effectively avoided.

The application provides a kind of free space continuous variable quantum key distribution method and system based on thermal state source, it is related to quantum key distribution technical field, including: continuous variable initial key distribution step: the detection result of regular component X and P after sending party Alice utilizes thermal state source polarization beam splitting, as local initial key;And another half thermal state optical signal is attenuated after transmission after being combined with local light through free space channel, by receiving party Bob detection, obtain corresponding initial continuous key data;Continuous data post-processing step: Bob carries out bit frame synchronization, block phase compensation, parameter evaluation, error correction and security enhancement to the initial continuous key data obtained, finally obtains safe binary bit key.The application can reduce the complexity of continuous variable quantum key distribution system implementation, and provide new application scenarios for quantum key distribution system.