86results about How to "Avoid bit errors" patented technology

The invention provides a distributed base station as well as a data transmission method and a data transmission device. The base station comprises a base band unit (BBU) and a radio remote unit (RRU) and is characterized in that the RRU comprises a first module and a second module, and the BBU comprises a third module, wherein the first module is used for carrying out data processing on a physical layer, the second module is used for carrying out data processing on the first part of MAC (Media Access Control) sublayer and data processing on the first part of RLC (Radio Link Control) sublayer, and the third module is used for carrying out data processing on the second part of MAC sublayer and data processing on the second part of RLC sublayer. After the invention is applied, the bandwidth requirement on a fiber interface between the BBU and the RRU in the base station can be lowered, and meanwhile, the processing performance of baseband data is ensured.

The invention discloses a data transmission method for supporting sub-channel modulation coding, which is used in a wireless local area network. The method comprises the following steps of: acquiring sub-channel modulation coding information which contains spatial stream information, sub-channel modulation mode of each spatial stream and coding rate through a first site; packing the sub-channel modulation coding information by adopting a physical layer data unit frame of a predetermined format; and sending a physical layer data unit of a predetermined format to a second site through the first site to demodulate the physical layer data unit frame so as to obtain received data. The invention also provides a corresponding wireless local area network system. As the modulation mode is selected according to the information condition of each sub-channel, the invention improves the data transmission efficiency, supports adaptive modulation coding on the sub-channel consisting of sub-carrier packets, effectively overcomes the frequency selectivity in the system, improves the performance of the system, and is backward compatible with the existing system.

The invention discloses a data strobe signal DQS position adjusting method and device. The method comprises the steps: acquiring the margin effective width of all data signals DQ on a transfer bus; determining a left boundary based on the margin effective width, and determining a right boundary, wherein the left boundary is the maximum value of the margin effective width minimum values of all DQs,and the right boundary is the minimum value of the corresponding all margin effective width maximum values of all DQs aligned with the left boundary; calculating a first center position according tothe left boundary and the right boundary, wherein the first center position is the center of the minimum margin effective width after all DQs are aligned during read data training; and adjusting a delay line DL of the DQS to the first center position. The method enables the margin of the setup time and the holding time of the data signal obtained by DQS sampling at the first central position to bemaximum, thereby avoiding the error code when the data is read and written, and improving the reliability of the data read and write operation.

The invention provides an electric energy meter reading method and a system and a user terminal. The method comprises collecting power consumption data by a user terminal according to pre-set parameters and storing the data; sending an instruction by a server to a center station; and receiving the instruction, processing the instruction by the center station and transmitting the instruction to all user terminals; wherein the user terminal is allocated with an address; and the user terminal discriminates the instruction when receiving the instruction and transmits the electric energy meter data stored therein to the server according to the discrimination result, or the user terminal of the electric energy meter is set correspondingly. The invention can achieve non-online meter reading and obviate various error codes caused by online monitoring mode, thereby improving the operation stability of the system. The user terminal can be directly connected with the prior electric energy meter without changing the electric energy meter thereby to significantly reduce the system cost.

The invention discloses a Mesh ad-hoc network channel adaptive automatic equalizer which comprises a linear equalizer and a decision feedback equalizer. The linear equalizer is composed of a delayed unit, tap coefficient units, a summing device and a sampling decision device, the tap coefficient unit consists of a noise producing module and a multiplier, outputs of all tap coefficient units are connected with the summing device, and a balance output of the summing device is connected with the sampling decision device. The decision feedback equalizer is composed of a forward direction filter and a feedback filter, the feedback filter consists of a tap coefficient unit and a delayed unit, a balance output of the equalizer is connected with an input of the delayed unit, an output of the delayed unit is connected with an input of the tap coefficient unit, and the outputs of the tap coefficient units are connected with the summing device. When tracking time-variable characteristics of a communication channel in real time, the Mesh ad-hoc network channel adaptive automatic equalizer overcomes the disturbance among symbols, can effectively prevent from producing signal distortion or producing error code on a receiving end in the process of information transport, and improves communication quality of Mesh ad-hoc network.

The invention relates to a typhoon emergency rapid drawing method based on a Beidou short message, and the method comprises the following steps: S1, determining typhoon emergency drawing information, carrying out the identification of a typhoon emergency drawing short message, and extracting a needed minimum information field data set; S2, carrying out the classification of information fields in the data set extracted at step S1 through a typhoon emergency information issuing platform, carrying out decimal text coding to form the Beidou short message, and carrying out the transmission of the Beidou short message through a Beidou communication module in the typhoon emergency information issuing platform and a Beidou communication satellite; S3, receiving the Beidou short message transmitted by the Beidou communication satellite through a typhoon emergency drawing terminal, analyzing the Beidou short message according to a decimal text coding rule, extracting information of drawing elements, and carrying out typhoon emergency drawing and display on a base map template according to the information of drawing elements. The method can iron out the defect of error codes or package loss caused by map compression or blocking, and improves the efficiency of quick drawing under the condition of typhoon emergency.

The invention discloses a multi-way ARINC429 data transmit-receive circuit structure based on the development of a DSP and a CPLD. The multi-way ARINC429 data transmit-receive circuit structure based on the development of the DSP and the CPLD comprises a DSP circuit, multiple sets of ARINC429 bus transmit-receive chip circuits, an auxiliary control circuit achieved through CPLD programming, wherein a data end of each ARINC429 bus transmit-receive chip is connected with the DSP, a control end of each ARINC429 bus transmit-receive chip is connected with the CPLD, the DSP circuit achieves control over the multiple sets of ARINC429 bus transmit-receive chips by sending an control instruction to a register circuit achieved through CPLD chip programming, and receiving decoding and sending coding of ARINC429 data are achieved through software in a DSP chip. The multi-way ARINC429 data transmit-receive circuit structure based on the development of the DSP and the CPLD can achieve real-time reading and sending of multiple ways of ARINC429 data through a data bus of the DSP chip, avoids collision, loss and error codes of the data, and achieves high-speed processing of the data.

The invention relates to a process for relaying remote control signals, specifically to a method using wireless communicating for relaying optical signals, which resolves the code error problem due to accumulated deviation in the relaying. The method includes: a transmitter receiving remote command signals sent by an infrared remote-controller, and digitalizing them into a set of codes and storing in order in a first memory cell group; the transmitter establishing a digital coding classification table, analyzing the affiliated category number of each encode value in the first memory cell group in order according to the classification table, and storing in order in a second memory cell group; the transmitter transmitting various category numbers in the second memory cell group in order to a receiver, the receiver receiving and storing the category number sequence; the receiver establishing a digitization encode classification table; the receiver reverting the category number sequence into a group of remote command codes with positive and negative impulse width duration time sequence according to the classification table, and then transferring to infrared sensors on the household electrical appliance in an infrared ray transmission mode.

The method comprises: a) according to the preset sequence, saving multi weighted sequences; b) the data vector in OFDM (orthogonal frequency division multiplexing) signals is divided into multi subvectors; c) selecting one weighted sequence from said multi weighted sequences in order to make peak value of the signals formed by the combination of the weighted sequence and said multi subvectors to be least; d) according to the location of the weighted sequence selected in multi weighted sequences, shifting the pilot frequency in OFDM signals.

The invention relates to a position measurement device based on a two-dimensional pseudo-random code, which belongs to the technical field of position measurement. The position measurement device is characterized by comprising a measurement coding ruler, a measurement head element, a stimulus signal generating unit, a signal conditioning unit and a position information processing unit, wherein an object to be measured is connected to the measurement coding ruler; the measurement coding ruler comprises non-magnetic coding elements, measurement magnetic coding elements, and fault-tolerant magnetic coding elements, wherein the non-magnetic coding elements and measurement magnetic coding elements are arranged correspondingly according to a measurement dimensional coding sequence mode and the fault-tolerant magnetic coding elements are inserted among different coding elements; the arrangement sequence of the fault-tolerant magnetic coding elements is in same correspondence to a fault-tolerant dimensional coding sequence; the coding elements are arranged according to the sequence and then are mutually coaxially connected; and the position information processing unit analyzes type information of the corresponding coding elements inside the measurement head element, wherein the type information is transmitted by the signal conditioning unit and is obtained by the sampling of the measurement head element, and the position information of the measured object is obtained after the type information is processed. The invention has the advantages of good extension property, high reliability and simple structure.

The invention provides a wireless Bluetooth on-ear voice communication system with channel coding, including a smart wireless device, wherein the Bluetooth master device includes a first Bluetooth chip, configured to establish a SCO link / CSB link / ACL link, channel-encode the data of the SCO link / CSB link / ACL link, and transmit the encoded data to the Bluetooth physical layer for transmission; theBluetooth slave device includes a second Bluetooth chip, configured to establish a SCO link / CSB link / ACL link, wherein the Bluetooth physical layer of the second Bluetooth chip receives the data of the encoded SCO link / CSB link / ACL link sent by the Bluetooth physical layer of the first Bluetooth chip, and performs channel decoding on the received data of the encoded SCO link / CSB link / ACL link. Theinvention improves the Bluetooth protocol between the master device and the slave device, and channel coding and decoding is adopted for the data to be transmitted in the subsystem formed by the master device and the slave device, thereby improving the reliability of the entire audio data transmission.

The method comprises: 1) at sending end, segmenting multimedia data into multi independent media data units; 2) recording the length information about each media data unit in the header information of the media data; 3) adding syn code between each media data unit to separate the multimedia data unit; 4) sending the header information, the media data units and the syn codes between the media data units to the receiving end. By the invention, after terminal receives the media data, even in the case of appearing error code, the error cannot be spread due to the correct segmentation of different data blocks.

The invention discloses a method for achieving the clock main equipment reversing without code error, which comprises the following steps: it links the hardware of the two clock units so that the clock signal can transmit to each other; the main clock unit controls the output clock signal by locking phase algorithm so that the output clock signal keeps the uniform with the input external guideline clock signal, and the stand-by clock unit real-time follow-ups and locks the output clock signal of the main clock unit; when it has the main equipment reversing, the stand-by clock unit controls the output clock signal by the control value of the main clock unit so that the output signal after reversing has the same frequency and the same phase with the clock signal before the reversing. It also discloses an appliance for achieving the clock main equipment reversing without code error.

The invention provides measurement and calculation methods of a digital modulation error. The method is characterized in that reference orthogonal baseband waveforms V3(t) at a terminal of a vector signal analyzer (VSA) is directly generated by an information bit sequence BT1 at a lead-in measured transmitting terminal, so that BIT sequences corresponding to a measured signal V2(t) and a reference signal V3(t) are bit sequences BT2 for receiving judgment, thereby generating an error code phenomenon at a receiving terminal. In addition, signal distortion is reflected correctly by measuring an error rate and modifying traditional EvmRms parameters. The method provided by the invention is utilized to solve defects produced by deep distortion signals measured by a traditional VSA measurement structure.

The invention discloses an anti-narrowband interference method combining a time domain and a frequency domain. The method comprises the following steps: S1, performing digital down-conversion processing on an ADC input signal to obtain I and Q orthogonal baseband data; S2, performing windowing processing on the N-point baseband data; S3, performing FFT operation on windowed data to obtain FFT data; S4, performing power spectrum estimation operation on the FFT data, juging interference spectral lines and generating frequency domain weight to obtain 0 and 1 weights; S5, performing weighting processing on the FFT data obtained in the step S3 by using the weight obtained in the step S4; S6, performing IFFT operation on the weighted data to obtain time domain data; S7, inputting the time domaindata into a time domain anti-interference module to carry out time domain LMS adaptive filtering; and S8, selecting data and then outputting signals. According to the invention, by combining frequency domain processing and time domain processing, the advantages of frequency processing and time domain processing are fully combined, the defects of frequency processing and time domain processing areavoided at the same time, and the anti-interference processing and high-precision measurement capabilities are high.

The invention provides a high-speed data transmission system based on LDPC and parallel QPSK modulation and an implementation method, which are characterized in that a sending end processes data by aparallel processing method, then performs LDPC coding, parallel QPSK modulation and frequency conversion and then transmits the data; and a receiving end performs frequency conversion and parallel QPSK demodulation on the signal, and sends the output parallel data to an LDPC decoding module to obtain decoded data, and combines the data by an inverse process of sending end grouping to obtain demodulated and decoded received data. According to the invention, the method of solving the transmission processes of encoding, modulating, demodulating, decoding and the like of high-speed signals by utilizing parallel low-speed processing is realized, a hundreds-order large filter which is high in hardware complexity, difficult to realize and high in system time delay is equivalently realized, the system processing time delay is effectively shortened, the hardware cost is reduced, error codes possibly existing in the high-speed signal transmission process are solved, and a technical basis is provided for application of actual airborne systems and the like.

The embodiment of the invention provides an all-optical two-dimensional quantization and coding method, an all-optical two-dimensional quantization and coding system and electronic equipment. The method comprises the steps of: on the basis of any obtained corresponding optical signal, obtaining the first code corresponding to any optical signal through multiple judgment thresholds by any amplitudequantization module, wherein any optical signal is obtained through a multichannel array filter; and, on the basis of first codes corresponding to all optical signals obtained by all the amplitude quantization module, obtaining second codes, so that all-optical two-dimensional quantization and coding are completed. According to the all-optical two-dimensional quantization and coding method, the all-optical two-dimensional quantization and coding system and the electronic equipment provided in the embodiment of the invention, the first code corresponding to any optical signal is obtained through multiple judgment thresholds; the problem that the position of the central wavelength only can be roughly estimated by adoption of single judgement in the prior art can be avoided; the false code condition can be avoided by adoption of the multiple judgment thresholds; and thus, the finally obtained second codes are relatively accurate.

The invention relates to a process for relaying remote control signals, specifically to a method using wireless communicating for relaying optical signals, which resolves the code error problem due to accumulated deviation in the relaying. The method includes: a transmitter receiving remote command signals sent by an infrared remote-controller, and digitalizing them into a set of codes and storing in order in a first memory cell group; the transmitter establishing a digital coding classification table, analyzing the affiliated category number of each encode value in the first memory cell group in order according to the classification table, and storing in order in a second memory cell group; the transmitter transmitting various category numbers in the second memory cell group in order toa receiver, the receiver receiving and storing the category number sequence; the receiver establishing a digitization encode classification table; the receiver reverting the category number sequence into a group of remote command codes with positive and negative impulse width duration time sequence according to the classification table, and then transferring to infrared sensors on the household electrical appliance in an infrared ray transmission mode.

The invention discloses a method for maintaining an intelligent clock, network equipment and a network management platform. The method comprises the following steps of: receiving an intelligent clock startup command cent by the network management platform; calculating the synchronization status information (SSM) grade of each light direction clock according to extracted SSM byte information of each light direction clock; comparing the SSM grade of each light direction clock, and locking a first clock with the optimal SSM grade; and reporting information on the locked first clock to the network management platform to establish an intelligent clock topological graph. The method for maintaining the intelligent clock, the network equipment and the network management platform effectively prevent network service error codes even base station crash caused by clock configuration errors, thereby ensuring the stability of a network; and simultaneously, the automatic locking of the optimal clock is realized without manual operation, and the working efficiency is high.

The present invention discloses a unidirectional bit error correction method for a OTP ROM, comprising: applying error correction encoding to bit information and writing the bit information to the OTP ROM; during power-up initialization, converting hard bit information read out from the OTP ROM to soft bit information; during the power-up initialization, performing error correction decoding through a soft bit decoder. The advantages of the present invention include: utilizing otherwise temporarily idle decoding modules in the chip, without requiring additional hardware resource, while providing stronger error correction capability to the OTP ROM, improving the stability of chip applications, prolonging chip service life, and significantly reducing rejection rate in chip production.

The invention discloses a processing method and device and a mobile terminal for weather forecast data. The method comprises the following steps of: requesting to acquire the weather forecast data from a current weather forecast data source; taking the acquired weather forecast data as the weather forecast data to be provided for a user when the weather forecast data is successfully acquired from the current weather forecast data source; and acquiring at least one available weather forecast data source from preset optional weather forecast data sources and acquiring the weather forecast data from the available weather forecast data source as the weather forecast data to be provided for the user when the weather forecast data is not successfully acquired from the current weather forecast data source. By adopting the technical scheme disclosed by the embodiment of the invention, when the weather forecast data can not be acquired from a current data source device, the weather forecast data can be still provided for a weather application by switching to the available weather forecast data source, so that the weather application can acquire the weather forecast data and the reliability of the weather application can be improved.

The invention provides a burst trans-impedance amplifier with a reset signal. An input photocurrent signal is input from a junction of an input end of a forward amplifier-A and a feedback resistor RF.An NMOS tube NO is connected with the feedback resistor RF in parallel; an output signal of the forward amplifier-A is divided into two paths, and one path is directly input into the inverting inputend of the differential voltage amplifier Diff Amp; the other path passes through resistors RS and RL in series and then is input to a differential voltage amplifier Diff Amp and an inverting input end of an operational amplifier OP; after being amplified by the differential voltage amplifier, the signal is converted into a differential signal OUTP / OUTN, and the differential signal OUTP / OUTN is output to the outside of the chip; and a switch S is connected with the resistor RL in parallel and is controlled by the reset signal RESET. In the lead code stage, the switch s is switched on, and in the data section, the switch s is switched off.

The invention discloses a clock generating and smoothing device which comprises an FIFO (First In First Out), a step length regulation module and a counter, wherein high-speed SDH (Synchronous Digital Hierarchy) data is taken as input data of the FIFO, an SDH clock is taken as a write clock of the FIFO, a high-speed reference clock is taken as a read clock and is used for reading data in the FIFO, the step length regulation module and the counter, and the data read from the FIFO is low-speed PHD (Pulse Height Detection) data. The FIFO uses deep data and sends the deep data to the step length regulation module, the step length regulation module outputs an accumulated step value to the counter subjected to judgment, the counter carries out accumulation according to the step value to obtain a counting value, and an output signal is reversed after the counting value reaches an upper limit to finally generate a smooth PHD clock. A PHD clock signal generated by applying the clock generating and smoothing device is smooth and can efficiently avoid error codes caused by misjudgment of a chip at downstream.

The invention relates to a safety protection system and method for a shunting operation on a stub-end track of a car dumper in a power plant. The safety protection system comprises locomotive identification devices, a ground host and a locomotive-mounted host, wherein the plurality of locomotive identification devices are distributed in an area near the end of a loaded railcar line track; the locomotive identification devices are used for generating railcar detection control point signals when a locomotive passes by, and transmitting the railcar detection control point signals to the ground host; the ground host is used for encoding the railcar detection control point signals, generating locomotive position data, and wirelessly transmitting the locomotive position data to the locomotive-mounted host; and the locomotive-mounted host is used for demodulating the locomotive position data to generate a locomotive position prompting voice so as to prompt a driver in the locomotive to perform a speed control operation. The safety protection system is an active defense system; the safety protection system can eliminate the interference of human factors, and is safe and reliable; and the safety protection system is capable of preventing the locomotive from rushing out of the stub-end track of the car dumper, and ensuring that the locomotive stops stably in front of the car dumper.

The invention discloses a chaotic optical fiber communication method based on electric domain compensation. The method includes the following steps: step 1, setting parameters of a chaotic optical fiber communication system; step 2, performing bipolar transformation on a binary data stream; step 3, encoding Sn into a chaotic signal u(t); step 4, determining a value of the number of iterations Iter; step 5, determining the input optical power; step 6, performing electric domain dispersion compensation; step 7, performing matched filtering on the signal after dispersion compensation; and step 8,carrying out sampling judgment, restoring source information, and completing the communication. The algorithm of the method is simple to implement and has low requirements on hardware structures.

The invention relates to a method and a device for realizing AGC (automatic gain control) gain gear control, wherein the method comprises the following steps: setting an AGC gain gear obtained from a main carrier frequency as an initial gear in a special state when an MS (mobile station) enters the special state from a free state; detecting a signal-to-noise ratio of an input signal when the MS enters the special state; and controlling the AGC gain gear control by the signal-to-noise ratio of the input signal when the signal-to-noise ratio is not less than a preset threshold value. With the adoption of the method and the device of the embodiment provided by the invention, error codes of a first business block in the special state can be effectively avoided, and the situation that a gear is locked can be effectively avoided, so that the normal operation of the business can be ensured.

The method includes steps: determining whether clock signal on master-slave board is need to be rearranged; adjusting jumping time of clock selective control signal level to be occurred, and relative relation of jumping time of clock signal level of master-slave board; making the said jumping time of clock selective control signal level be located in time period of identical signal level of clock signal of master-slave board; based on selected jumping time of clock selective control signal level, determining clock signal after clock rearranging. The invention also discloses the device for implementing based on the method. The invention realizes fast clock rearranging with no spike so as to avoid error generated in communication system, raises stability and reliability of communication system.

The invention relates to a method for returning the clock in radio remote module and relative device. Wherein, according to the data that the radio remote module RRU receives from the base station, obtaining the clock signal; using said clock signal as the reference clock of soft phase-locked loop to be input the soft phase-locked loop; using the time clock of soft phase-locked loop, that output according to the soft phase-locked preset algorithm and its reference clock, as the reference clock of hard phase-locked loop; using the clock signal output by hard phase-locked loop, according to its reference clock and the clock signal output from soft hard phase-locked loop as the clock signal of RRU. The invention can make the phase noise character of clock signal of radio part in the RRU meet the demand of clock, and make the clock signal of RRU high-speed data interface meet the demand of clock accuracy and RRU cascade, to make the clock signal of RRU meet the demands of clock vibration and clock synchronization, to confirm the data transmission between the RRU and the high-speed interface of base station.