35 results about "Spread factor" patented technology

The invention provides a dynamic spreading factor anti-interference method based on annealing Q learning. The method comprises the following steps: determining an information transmission rate according to a spreading factor; determining system throughput and an optimization target according to the signal-to-noise ratio of the receiving end; determining a state space, an action space, a state transition probability matrix and rewards in the decision process; calculating a reward obtained by the selection action according to a broadband spectrum sensing result; the interference condition at the current moment is obtained through broadband spectrum sensing; deciding a spreading factor of the next time slot according to the Q value table; the user selects the action of the next time slot according to the decision information and updates the state; the award obtained by selecting the corresponding action is calculated according to the broadband spectrum sensing result; selecting the spreading factor of the next time slot according to the Q value table, and updating the Q value of the selection action in the state; and the user makes the most anti-interference strategy in a dynamic interference environment. According to the method, the system throughput is maximized, and time delay and overhead caused by channel switching are avoided.

The invention relates to the technical field of Internet of Vehicles, and discloses an Internet of Vehicles device scheduling method based on a LoRa ad hoc network and a Prophet algorithm, comprising the following steps: deploying LoRa nodes to form an ad hoc network, adopting a star-shaped or mesh topology structure, and setting transmission rate, signal bandwidth and spreading factor parameters; information such as the position, the speed and the direction of a vehicle is obtained through GPS or V2X communication, and interference, noise level and signal strength of a LoRa channel are monitored in real time for dynamically adjusting transmission parameters; designing an adaptation and scheduling strategy based on a Prophet algorithm; and dynamically updating the encounter frequency and the encounter duration, and selecting an optimal forwarding node in combination with the probability of Prophet and the transmission parameter of LoRa. According to the method, the interference, the noise level and the signal strength of the LoRa channel are monitored in real time, and the spreading factor (SF), the bandwidth and the power are dynamically adjusted, for example, the SF12 and 125kHz bandwidths are adopted during long-distance transmission, and the SF7 and 500kHz bandwidths are switched to a high-speed scene, so that the transmission efficiency is improved by more than 20%.

A user equipment (UE) that includes one or more non-transitory computer-readable media storing one or more computer-executable instructions for determining the transport block size for a Physical Uplink Shared Channel (PUSCH) transmission and at least one processor coupled to the one or more non-transitory computer-readable media is provided. The processor is configured to execute the one or more computer-executable instructions to cause the UE to determine whether an Orthogonal Cover Code (OCC) is applied to the PUSCH transmission; determine a spreading factor of the OCC in a case that the OCC is applied to the PUSCH transmission; and determine the transport block size using a scaling factor in a case that the OCC is applied to the PUSCH transmission, the scaling factor being determined based on the spreading factor.

A method and system for improving channel estimation for multi-user, multiple-input, multiple-output (MU-MIMO) systems through dynamic DM-RS port allocation in a 5G New Radio network is provided. The method comprises of allocating, by a Scheduler aware UE port allocation unit, one or more MU-MIMO ports to a plurality of code division multiplexing (CDM) groups for a plurality of UE users, performing, by a code selection unit, a code selection based on a number of allocated MU-MIMO ports, determining, by a spreading factor unit, a spreading factor allocated for each of the MU-MIMO ports in each of the plurality of CDM groups, determining, by a signalling unit, a Downlink Control Information (DCI) signalling of a Partial Port Occupancy (P-Poi) transmission for each UE and obtaining, by a channel estimation unit, channel estimates at the receiver through VSFOCC de-spreading based on the P-POI assigned for each of the MU-MIMO ports.

To suppress a demodulation error rate while utilizing a fractional spreading factor in LoRa modulation.SOLUTION: A demodulator (30) comprises a sampling unit (302), a correction unit (306), an estimation unit (307), and an output unit (308). The sampling unit performs oversampling on a received signal subjected to FSF-LoRa modulation that uses a predetermined spreading factor and a predetermined fractional coefficient, at a sampling interval obtained by dividing a chip length used in the FSF-LoRa modulation by a predetermined oversampling coefficient, thereby generating an equivalent low-pass signal. The correction unit (306) performs correction, which is based on the spreading factor, the fractional coefficient and the oversampling coefficient, on a de-spread DFT signal obtained by performing de-spreading processing and DFT processing on the equivalent low-pass signal, thereby generating a correction signal. The estimation unit (307) estimates a frequency index having a maximum amplitude among a plurality of frequency indices included in the correction signal as an index of a desired signal.SELECTED DRAWING: Figure 3

A method (400, 500) of transmitting data, by a utility metering device (200) and to a further device, using long range, LoRa, communications. The method (400, 500) comprises assigning, to each item of data (302a-j) of a plurality of data (300) to be transmitted by the utility metering device (200), a priority level from a plurality of priority levels; determining a desired transmission interval based a desired energy consumption from a power source powering the utility metering device (200), during transmission, by the utility metering device, of a predetermined size of data at a first data rate associated with a first spreading factor, wherein the first data rate is one of a plurality of predefined data rates, each data rate of the plurality of data rates being associated with a corresponding spreading factor, and wherein the first data rate is the lowest data rate of the plurality of predefined data rates and the first spreading factor is the highest spreading factor of the corresponding spreading factors; determining a transmission data rate; determining which one or more items of data, of the plurality of data, to transmit at the desired transmission interval, based on the determined transmission data rate and the priority level assigned to each item of data; and transmitting the determined one or more items of data to the further device at the desired transmission interval using the determined transmission data rate.

A user equipment (UE) that includes one or more non-transitory computer-readable media storing one or more computer-executable instructions for determining the transport block size for a Physical Uplink Shared Channel (PUSCH) transmission and at least one processor coupled to the one or more non-transitory computer-readable media is provided. The processor is configured to execute the one or more computer-executable instructions to cause the UE to determine whether an Orthogonal Cover Code (OCC) is applied to the PUSCH transmission; determine a spreading factor of the OCC in a case that the OCC is applied to the PUSCH transmission; determine whether a condition is satisfied for determining the transport block size; and determine the transport block size using a scaling factor in a case the condition is satisfied, the scaling factor being determined based on the spreading factor.

A user equipment (UE) that includes one or more non-transitory computer-readable media storing one or more computer-executable instructions for determining the transport block size for a Physical Uplink Shared Channel (PUSCH) transmission and at least one processor coupled to the one or more non-transitory computer-readable media is provided. The processor is configured to execute the one or more computer-executable instructions to cause the UE to determine whether an Orthogonal Cover Code (OCC) is applied to the PUSCH transmission; determine a spreading factor of the OCC in a case that the OCC is applied to the PUSCH transmission; and determine the transport block size using a scaling factor in a case that the OCC is applied to the PUSCH transmission, the scaling factor being determined based on the spreading factor.

For a bandwidth extension of an audio signal, in a signal spreader the audio signal is temporally spread by a spread factor greater than 1. The temporally spread audio signal is then supplied to a decimator to decimate the temporally spread version by a decimation factor matched to the spread factor. The band generated by this decimation operation is extracted and distorted, and finally combined with the audio signal to obtain a bandwidth extended audio signal. A phase vocoder in the filterbank implementation or transformation implementation may be used for signal spreading.

For a bandwidth extension of an audio signal, in a signal spreader the audio signal is temporally spread by a spread factor greater than 1. The temporally spread audio signal is then supplied to a decimator to decimate the temporally spread version by a decimation factor matched to the spread factor. The band generated by this decimation operation is extracted and distorted, and finally combined with the audio signal to obtain a bandwidth extended audio signal. A phase vocoder in the filterbank implementation or transformation implementation may be used for signal spreading.

Various aspects of the present disclosure relate to devices and methods of communication. UE may receive a configuration for an uplink transmission from a base station. The UE may process a reference signal by applying a first multiplexing sequence associated with a first spreading factor to the reference signal, and transmit uplink data with the processed reference signal to the base station based on the configuration. In this way, a reference signal for an uplink transmission may be transmitted reliably, and multiplexing of multiple UEs in the same physical resource for the uplink transmission may be enhanced. Thus, uplink capacity may be enhanced.

For a bandwidth extension of an audio signal, in a signal spreader the audio signal is temporally spread by a spread factor greater than 1. The temporally spread audio signal is then supplied to a decimator to decimate the temporally spread version by a decimation factor matched to the spread factor. The band generated by this decimation operation is extracted and distorted, and finally combined with the audio signal to obtain a bandwidth extended audio signal. A phase vocoder in the filterbank implementation or transformation implementation may be used for signal spreading.

For a bandwidth extension of an audio signal, in a signal spreader the audio signal is temporally spread by a spread factor greater than 1. The temporally spread audio signal is then supplied to a decimator to decimate the temporally spread version by a decimation factor matched to the spread factor. The band generated by this decimation operation is extracted and distorted, and finally combined with the audio signal to obtain a bandwidth extended audio signal. A phase vocoder in the filterbank implementation or transformation implementation may be used for signal spreading.

Systems, methods, and instrumentalities are described herein that may be used to determine one or more control channel operational parameters associated with transmitting first uplink control information (UCI) and second UCI in a same control channel. The parameters may include respective repetition factors and / or spreading factors associated with the first UCI and the second UCI. The parameters may be determined based on respective characteristics of the first UCI and the second UCI. These characteristics may include reliability requirements, usage scenarios, and / or the like. Self-contained subframes may be employed to transmit data and / or control information. The control information may be transmitted using different numerologies than the data.

For a bandwidth extension of an audio signal, in a signal spreader the audio signal is temporally spread by a spread factor greater than 1. The temporally spread audio signal is then supplied to a decimator to decimate the temporally spread version by a decimation factor matched to the spread factor. The band generated by this decimation operation is extracted and distorted, and finally combined with the audio signal to obtain a bandwidth extended audio signal. A phase vocoder in the filterbank implementation or transformation implementation may be used for signal spreading.

For a bandwidth extension of an audio signal, in a signal spreader the audio signal is temporally spread by a spread factor greater than 1. The temporally spread audio signal is then supplied to a decimator to decimate the temporally spread version by a decimation factor matched to the spread factor. The band generated by this decimation operation is extracted and distorted, and finally combined with the audio signal to obtain a bandwidth extended audio signal. A phase vocoder in the filterbank implementation or transformation implementation may be used for signal spreading.

The present application relates to the technical field of communications, and in particular to an encoding method, a decoding method, and an apparatus. The present application can be applied to the IEEE 802.11ax standard, the 802.11be standard, and the 802.11bn standard, as well as other standards of the IEEE 802.11 series, such as the 802.15 standard, the 802.11bf standard, the IMMW standard, or the SparkLink standard. The method comprises: a first station acquires information bits, performs LDPC encoding on the information bits on the basis of a check matrix, obtains encoded bits, and outputs a sequence. After obtaining information to be decoded, a second station performs LDPC decoding in combination with the check matrix to obtain information bits. A code length corresponding to the check matrix is 7776, a code rate corresponding to the check matrix is 2 / 3, and a spreading factor of the check matrix is 162. The check matrix can better match a longer code length, thereby improving encoding and decoding performance.

The invention discloses a multi-user anti-interference decision-making method based on sparse strategy propagation. The method comprises the following steps: step 1, determining the number of divided sub-time slots of users according to an interference detection history; 2, determining the information transmission rate of the sub-time slot according to the spreading factor; 3, determining system throughput and an optimization target according to the signal-to-noise ratio of a receiving end; 4, determining a state space, an action space, a state transition probability matrix and rewards in the decision process; step 5, obtaining lower-layer main network parameters according to the empirical samples and the loss function; step 6, obtaining an upper layer main network parameter according to the experience sample and the loss function; and 7, obtaining an optimal anti-interference strategy according to iterative training. According to the method, the decision complexity is reduced, and dimension disasters are avoided.

For a bandwidth extension of an audio signal, in a signal spreader the audio signal is temporally spread by a spread factor greater than 1. The temporally spread audio signal is then supplied to a decimator to decimate the temporally spread version by a decimation factor matched to the spread factor. The band generated by this decimation operation is extracted and distorted, and finally combined with the audio signal to obtain a bandwidth extended audio signal. A phase vocoder in the filterbank implementation or transformation implementation may be used for signal spreading.

This invention discloses a low-power, high-throughput 5G LDPC decoder implementation method, specifically comprising: Step 1, calculating the parameters required for decoding from the input parameters; Step 2, based on the spreading factor Z... c The values ​​are stored in different blocks according to different storage methods; Step 3: Based on the expansion factor Z c The value of determines whether to perform layer splitting transformation on the base matrix and update the required posterior probability information of the variable nodes; Step 4: Update the information of the check nodes and the posterior probability information of the variable nodes within the layer; Step 5: Implement layered iterative decoding; Step 6: After updating the information of all check nodes in each layer and reaching the set number of iterations, the decoding iteration is completed, and the output processing of the decoding result begins. This method significantly reduces the required resources; and by utilizing the orthogonality of adjacent layers of the split matrix, the intra-layer pipelining operation improves the decoder throughput after reducing the decoding parallelism. A low-consumption, high-throughput 5G LDPC decoder implementation device is also disclosed.

The application is suitable for the field of communication technology, and provides a mobile terminal communication method, system, device, terminal equipment and storage medium. The method is applied to a LoRa mobile terminal. The method comprises the following steps: firstly, receiving a LoRa data packet transmitted by a preset LoRa signal source; secondly, determining a pilot strength of the LoRa data packet, and determining a target spreading factor according to the pilot strength; and finally, transmitting device data to a gateway in a target time region corresponding to the target spreading factor according to the target spreading factor, so that the server receives the device data through the gateway, and determines position information of the LoRa mobile terminal according to the device data. In the method, the LoRa mobile terminal acquires the LoRa data packet according to the LoRa signal source, thereby determining the target spreading factor. The device data is transmitted to the gateway and the server based on the target spreading factor and the corresponding target time region, so that the server quickly acquires the position information of the mobile terminal, and the communication connection between the LoRa mobile terminal, the gateway and the server is realized.

The present application relates to the technical field of communications, and in particular to an encoding method and apparatus, and a decoding method and apparatus. The present application can be applied to the IEEE 802.11ax standard, 802.11be standard, 802.11bn standard, etc., and other standards in the IEEE 802.11 series, such as the 802.15 standard, 802.11bf standard, IMMW standard, or StarFlash standard. The encoding method comprises: a first station acquiring an information bit, performing LDPC encoding on the information bit on the basis of a check matrix to obtain an encoded bit, and outputting the encoded bit. A second station acquires information to be decoded, and then performs LDPC decoding on the basis of the check matrix to obtain the information bit. A code length corresponding to the check matrix is 7776, a code rate corresponding to the check matrix is 1 / 2, and a spreading factor of the check matrix is 162. The check matrix can better match a longer code length, thereby improving the encoding and decoding performance.

For a bandwidth extension of an audio signal, in a signal spreader the audio signal is temporally spread by a spread factor greater than 1. The temporally spread audio signal is then supplied to a decimator to decimate the temporally spread version by a decimation factor matched to the spread factor. The band generated by this decimation operation is extracted and distorted, and finally combined with the audio signal to obtain a bandwidth extended audio signal. A phase vocoder in the filterbank implementation or transformation implementation may be used for signal spreading.

Various aspects of the present disclosure relate to relate to a method and apparatus of uplink transmissions. An exemplary method performed by a UE may include: receiving an uplink configuration; applying a multiplexing sequence to process uplink data based on the uplink configuration, wherein the multiplexing sequence is associated with a spreading factor; and transmitting the processed uplink data in physical resources based on the uplink configuration.

The invention relates to a high-performance LoRaWAN gateway based on a Linux system and a data processing method, and the gateway comprises the following service modules: a LoRa packet forwarding service which is used for initializing a LoRa radio frequency module based on a Semtech libragw library, setting radio frequency parameters such as a center frequency, a bandwidth and a spreading factor, and carrying out bidirectional data interaction with a Chirpstack service through a local UDP protocol. The gateway can still independently complete LoRaWAN data analysis and node management in a network-free environment, through local UDP optimization and caching, delay and packet loss caused by network fluctuation are reduced, dependence on cloud computing resources is reduced, a system architecture is simplified, deployment and operation and maintenance costs are reduced, data security and real-time performance are enhanced, and the method and the device are suitable for large-scale popularization and application. And high-reliability scene requirements of industrial Internet of Things, smart agriculture and the like are met.

For a bandwidth extension of an audio signal, in a signal spreader the audio signal is temporally spread by a spread factor greater than 1. The temporally spread audio signal is then supplied to a decimator to decimate the temporally spread version by a decimation factor matched to the spread factor. The band generated by this decimation operation is extracted and distorted, and finally combined with the audio signal to obtain a bandwidth extended audio signal. A phase vocoder in the filterbank implementation or transformation implementation may be used for signal spreading.

Disclosed are a long-range radio communication method and device based on a spreading factor index, the method including: within one symbol period, dividing a plurality of information bits into index bits and modulated bits; mapping the index bits into a spreading factor sequence, and generating first chirp signals corresponding to various spreading factors (SFs); and converting the modulated bits to decimal numbers associated with the various SFs, modulating the decimal numbers into carrying signals, multiplying the carrying signals by the first chirp signals associated with the SFs to obtain second chirp signals associated with the various SFs, and superposing the second chirp signals to obtain a transmitted signal. According to the disclosure, by combining different SFs, an additional dimension is created to carry more information bits, so as to achieve the effect of increasing a data rate.

For a bandwidth extension of an audio signal, in a signal spreader the audio signal is temporally spread by a spread factor greater than 1. The temporally spread audio signal is then supplied to a decimator to decimate the temporally spread version by a decimation factor matched to the spread factor. The band generated by this decimation operation is extracted and distorted, and finally combined with the audio signal to obtain a bandwidth extended audio signal. A phase vocoder in the filterbank implementation or transformation implementation may be used for signal spreading.

A user equipment (UE) that includes one or more non-transitory computer-readable media storing one or more computer-executable instructions for determining the transport block size for a Physical Uplink Shared Channel (PUSCH) transmission and at least one processor coupled to the one or more non-transitory computer-readable media is provided. The processor is configured to execute the one or more computer-executable instructions to cause the UE to determine whether an Orthogonal Cover Code (OCC) is applied to the PUSCH transmission; determine a spreading factor of the OCC in a case that the OCC is applied to the PUSCH transmission; determine whether a condition is satisfied for determining the transport block size; and determine the transport block size using a scaling factor in a case the condition is satisfied, the scaling factor being determined based on the spreading factor.

The invention provides a LoRa-based modulation and demodulation method, device and equipment, and relates to the technical field of Internet communication, and the method comprises the steps: obtaining a receiving signal, filtering the receiving signal through a band-pass filter, obtaining a first filtering signal, filtering the first filtering signal through a low-pass filter, and obtaining a second filtering signal; the method comprises the following steps: acquiring a first filtering signal, sampling according to the cut-off frequency of a low-pass filter, performing compounding and FFT (Fast Fourier Transform) to obtain a second filtering signal, determining the position of the maximum amplitude spectrum value in the second filtering signal as a demodulation symbol, and adjusting a spreading factor and / or sending time corresponding to the demodulation symbol based on a conflict monitoring signal to obtain a conflict monitoring signal. And the adjusted demodulation symbol is sent to a demodulation end for demodulation, so that the bit error rate in the signal transmission process is reduced, and the reliability of signal transmission is improved.