33 results about "Effective data transfer rate" patented technology

Multi-drop communications channels can have significantly deep notches in their frequency response causing a corresponding limitation of the effective data transmission rate. A special time-ordered coding method is described which results in the emitted spectrum of the data stream transmitted into the channel having a notch at the same frequency as the notch in the channel frequency response, permitting channel receivers to successfully decode the transmitted data stream. The described coding method may be applied at various multiples of the channel notch frequency to support different throughput rates, and may be combined with other coding techniques such as group or vector signaling codes.

In accordance to one aspect, a method for optimizing the effective data transmission rate in a bus system, in particular in automation technology is provided. A data telegram used in higher-order data networks based on the Internet protocol, with at least one data telegram, at least one data segment and / or at least one data section being generated and / or modified and / or deleted by at least one slave. The topology of the bus system can hereby be selected according to the application and is taken into account in the configuration of the data contained in the data telegrams, without infringing the protocol characteristics of the higher-order data network. The number of data telegrams required is hereby significantly reduced, in particular on communication links with maximum loading.

This invention provides a data transfer device, data transfer system, and data transfer method.a transfer start / end detecting section detects timing at which a DMARQ signal becomes an H level or an L level. A transfer time-measuring section measures a transfer time during which data transfer is actually performed within a period in which a predetermined number of data blocks are transferred. A transfer byte count-measuring section measures a transferred byte count of data that have successfully been transferred. An effective data transfer rate-computing section computes an effective data transfer rate by dividing the transferred byte count by the transfer time. A transfer rate-comparing section compares the effective data transfer rate with a transfer rate that is one step slower than a current transfer rate output from a selectable transfer rate-storing section. If the former is slower, a transfer rate-switching section switches to the transfer rate that is one step slower. A large decrease in the effective data transfer rate caused by data corruption is prevented.

The invention discloses a system and a method for executing data transferring rate adjustment to improve the effective data transfer rate of a serial ATA storage apparatus. When the data is transferred, the insertion of an ALIGN primitive element reduces the data transferring rate. A receiving device only abandons the ALIGN primitive element. Thus a receiving data First-In First-Out (FIFO) is not filled in and a flow control sequence with less flow control demand prevents the data FIFO from overflow. The advantage of the ALIGN primitive element instead of the conventional flow control is that the ALIGN does not cause a roundtrip signal switching delay and discontinuation and later starts the data transfer.

The invention discloses a system and a method for executing data transferring rate adjustment to improve the effective data transfer rate of a serial ATA storage apparatus. When the data is transferred, the insertion of an ALIGN primitive element reduces the data transferring rate. A receiving device only abandons the ALIGN primitive element. Thus a receiving data First-In First-Out (FIFO) is notfilled in and a flow control sequence with less flow control demand prevents the data FIFO from overflow. The advantage of the ALIGN primitive element instead of the conventional flow control is thatthe ALIGN does not cause a roundtrip signal switching delay and discontinuation and later starts the data transfer.

The invention discloses a self-adaption transmission mode selecting system and method for a vehicle communication access network. The system comprises a vehicle information service flow generating module, a vehicle information service flow classifying and mapping module, a grouping and submitting module, a self-adaption transmission mode selecting module, an OFDMA wireless resource allocating module, a frame sending / receiving module and an access channel / driving state / local geographic area information detecting module which are arranged at the I / B position. The system further comprises a vehicle information service flow generating module, a vehicle information service flow classifying and mapping module, a grouping and submitting module, a self-adaption transmission mode selecting module, an OFDMA wireless resource allocating module, a frame sending / receiving module and an access channel / driving state / local geographic area information feedback module which are arranged at the SV position. The self-adaption transmission mode selecting system introduces an OFDMA technique and an AMC technique, can balance ITS information service flow transmission effectiveness and system transmission efficiency, can meet the QoS requirements of various ITS information service flows and meanwhile can acquire high system average effective data transmission rate.

This invention provides a data transfer device, data transfer system, and data transfer method.a transfer start / end detecting section detects timing at which a DMARQ signal becomes an H level or an L level. A transfer time-measuring section measures a transfer time during which data transfer is actually performed within a period in which a predetermined number of data blocks are transferred. A transfer byte count-measuring section measures a transferred byte count of data that have successfully been transferred. An effective data transfer rate-computing section computes an effective data transfer rate by dividing the transferred byte count by the transfer time. A transfer rate-comparing section compares the effective data transfer rate with a transfer rate that is one step slower than a current transfer rate output from a selectable transfer rate-storing section. If the former is slower, a transfer rate-switching section switches to the transfer rate that is one step slower. A large decrease in the effective data transfer rate caused by data corruption is prevented.

A wireless LAN access point is configured to perform a shaping operation to calculate and set an upper limit of communication speeds of belonging mobile units when the number of the belonging mobile units is equal to or more than a preset threshold. The wireless LAN access point is configured to extract a highest one or a lowest one of data transfer rates that are detected by analyzing header parts of communication packets to be exchanged respectively with the belonging mobile units as a shaping data-transfer rate. The wireless LAN access point is configured to calculate the upper limit of the communication speeds of the belonging mobile units on the basis of a correction factor that is arbitrarily set for converting the shaping data-transfer rate to an effective data-transfer rate, on the basis of the shaping data-transfer rate, and on the basis of the number of the belonging mobile units.

The invention relates to a hydraulic support frame data collecting method, a hydraulic support frame data collecting system and a hydraulic support frame centralized control system. The hydraulic support frame data collecting method comprises the following steps of: obtaining the number of a located hydraulic support frame of a coal mining machine; determining the number of an adjacent hydraulic support frame of the coal mining machine according to the number of the located hydraulic support frame of the coal mining machine; and collecting the support frame information data of the hydraulic support frames according to the number of the located hydraulic support frame of the coal mining machine and the number of the adjacent hydraulic support frame of the coal mining machine. The support frame information data of the located hydraulic support frame and the adjacent hydraulic support frame of the coal mining machine are collected, and the polling of the data of all of the hydraulic support frames is not needed, so that a remote control center can timely obtain the effective hydraulic support frame data; the effective data transmission speed of the remote control center and a fully mechanized coal mining face is accelerated; meanwhile, the effective data transmission effect is accelerated, so that the operation speed of the coal mining machine can be properly accelerated; the automatic mining efficiency is further improved; and the hydraulic support frame data collecting method, the hydraulic support frame data collecting system and the hydraulic support frame centralized control system can be widely applied to the automatic mining field.

The invention discloses a method for adaptive bandwidth adjustment for industrial site communication, which belongs to the field of communication technology and comprises the following steps: ①preliminary preparation for entering cyclic communication, ②after entering cyclic communication, use Gaussian process regression algorithm to estimate the current bandwidth and Predict the channel gain matrix corresponding to the two pre-spreading bandwidths, ③ obtain the current receiving end rate v and compare, ④ compare the mean value of the channel gain matrix H, ⑤ perform loop detection when any of the conditions in step 3 or 4 are not satisfied, ⑥ satisfy In any case in step 3 or 4, bandwidth adjustment is performed after further judging the channel gain matrix corresponding to the pre-spreading bandwidth. The present invention combines the channel estimation algorithm based on the intelligent algorithm to obtain more accurate channel estimation results and evaluates them, and at the same time combines the effective data transmission rate v of the current receiving end to dynamically adjust the bandwidth size according to the effective transmission rate V of the specified communication system. Communication resource costs are saved where required.

The invention belongs to the technical field of radar, and relates to a CE-OFDM-based integrated radar communication system. The present invention proposes a CE-OFDM-based super-resolution radar communication integration solution through communication information compensation that can improve the effective data transmission rate and solve the problem of excessively high PAPR of OFDM signals based on the traditional OFDM communication radar integration solution. The sending end firstly converts the data to be sent into a CE‑OFDM symbol frame through QAM modulation, IFFT transformation and phase modulation, and replaces a single pulse in a pulse repetition period with a frame of CE‑OFDM symbols, thereby increasing the data transmission rate and solving the problem of Send signal PAPR too high problem. At the receiving end, after demodulating the received waveform pulse, the signal can be demodulated by the reverse process of the CE-OFDM system transmission process, and the data can be demodulated; and since the transmitted waveform is known, the pulse compression processing is performed on the received echo, and the communication After information compensation, the super-resolution estimation of the distance and speed of the target can be completed through decoherence processing and MUSIC algorithm.

The invention discloses a real-time online simulation system of an MMC type high-voltage frequency converter based on RT-Lab and WiGig. The system includes a host computer, a target machine, a controller, an MMC type high-voltage frequency converter, and a WiGig wireless communication module. The communication specification of the WiGig wireless communication module adopts the G.hn standard. Collect the output signal of the MMC high-voltage inverter control unit through the RT-LAB simulator, realize the capacitor voltage balance control and modulation of the MMC high-voltage inverter rectifier side and the inverter side converter, and simulate the MMC high-voltage inverter in real time The real-time wireless signal interaction between the real equipment of the control unit realizes the simulation control of the MMC type high-voltage inverter. The invention effectively improves the data transmission rate among various components in the system, provides a large amount of technical reference data for the real-time control of the MMC type high-voltage frequency converter, and can greatly shorten the research and development cycle and cost of the MMC type high-voltage frequency converter.

The invention relates to a method for sharing channels, comprising the following steps of: A. distributing an idle registration channel for a cognitive user; B. detecting whether an authorized user appears or not, if the authorized user appears, distributing the registration channel for the authorized user, and measuring an interference temperature threshold for ensuring that the authorized user normally uses the registration channel, acquiring the maximum available power of the cognitive user according to the interference temperature threshold, and if the authorized user does not appear, continue to detecting; and C. calculating whether the cognitive user can carry out data transmission or not by using the maximum available power, if so, regulating the transmitting power of the cognitive user, and if not, switching the cognitive user to the idle channel. Moreover, the invention also relates to a system for sharing channels. The method and the system for sharing channels judge whether the cognitive user can carry out data transmission or not by using the maximum available power to control the action of the cognitive user, which greatly reduces the frequency spectrum switching efficiency, improves the frequency spectrum use ratio and network performance and meanwhile also improves the effective data transfer rate.