11 results about "Superposition coding" patented technology

The embodiment of the invention discloses a communication method, a communication device and a storage medium, which are applied to the technical field of communication and are used for realizing superposition coding between transmission blocks. The method comprises the steps that first data is determined, the first data comprises a first code block, the first code block is obtained by overlapping a plurality of code blocks, and at least two of the code blocks belong to different first transmission blocks; the first data packet is sent, the first data packet comprises multiple pieces of data, and the multiple pieces of data comprise the first data. The first code block in the first data is obtained by superposing the data in the plurality of first transmission blocks, so that when the data transmission in the data packet has an error, the receiving end equipment can correct the error data according to the first data in the data packet, so that the data in the data packet can be successfully decoded, and the decoding efficiency of the data packet is improved. The performance gain of mutual error correction between transmission blocks is improved.

The application relates to the technical field of wireless communication and vehicle-mounted multimedia interaction, in particular to a vehicle-mounted video backhaul and multi-mode audio interaction system, which comprises the following modules: a service shunting module, which is used for determining the priority label of audio stream data according to an identification result; a channel analysis module, which is used for evaluating the channel capacity and interference level of current time-frequency resources; a power domain allocation module, which is used for dynamically calculating a power allocation coefficient and dividing the total transmission power of a vehicle-mounted communication terminal into a first power level and a second power level; a superposition coding module, which is used for generating a multi-layer superposition signal; and a transmission control module, which is used for directly transmitting the multi-layer superposition signal to a base station side through a radio frequency unit in a scheduling-free transmission mode without sending a scheduling request signaling, so that the competition and conflict of high-definition video backhaul and key voice interaction for limited time-frequency resources in vehicle-mounted wireless communication are effectively solved, and efficient concurrency of heterogeneous services is realized.

The application discloses a method for interference utilization of a reconfigurable intelligent surface assisted cognitive non-orthogonal multiple access network, and comprises the following steps: constructing a reconfigurable intelligent surface assisted downlink cognitive radio non-orthogonal multiple access system; a superposition coding is adopted by a base station to send signals to all users, and a joint optimization of an active beamforming vector of the base station and a passive reflection phase shift matrix of the reconfigurable intelligent surface is performed to construct a constructive superposition signal for direct detection of a secondary user; the secondary user directly demodulates own data through a single user detector without performing serial interference cancellation (SIC) based on the constructive superposition signal; by utilizing the intelligent reconstruction of a wireless propagation environment by the reconfigurable intelligent surface, the application adopts a constructive interference technology to convert strong interference of a primary user into a constructive signal of a secondary user; the mechanism realizes direct detection through the constructive interference design, greatly simplifies the receiving and processing of the secondary user and reduces the time delay.

The invention relates to the technical field of wireless communication and vehicle-mounted multimedia interaction, in particular to a vehicle-mounted station video return and multi-mode audio interaction system, which comprises a service shunting module used for determining a priority label of audio stream data according to an identification result; the channel analysis module is used for evaluating the channel capacity and the interference level of the current time-frequency resource; the power domain distribution module is used for dynamically calculating a power distribution coefficient and dividing the total transmitting power of the vehicle-mounted communication terminal into a first power level and a second power level; the superposition coding module is used for generating multiple layers of superposition signals; the transmission control module is used for directly transmitting the multi-layer superposed signal to a base station side through a radio frequency unit in a scheduling-free transmission mode under the condition that a scheduling request signaling does not need to be sent; according to the method, the competition conflict of high-definition video return and key voice interaction on limited time-frequency resources in vehicle-mounted wireless communication is effectively solved, and efficient concurrency of heterogeneous services is realized.

Disclosed in the embodiments of the present application are a communication method, a communication apparatus and a storage medium, which are applied to the technical field of communications, and used for implementing superposition encoding between transport blocks. The method in the embodiments of the present application comprises: determining first data, wherein the first data comprises a first code block, the first code block is obtained by means of superimposing a plurality of code blocks, and at least two of the plurality of code blocks belong to different first transport blocks; and sending a first data packet, wherein the first data packet comprises a plurality of pieces of data, and the plurality of pieces of data comprise the first data. A first code block in first data is obtained by means of superimposing data in a plurality of first transport blocks, such that when an error occurs during the transmission of data in a data packet, a receiver-side device can perform error correction on erroneous data on the basis of the first data in the data packet. Therefore, the data in the data packet can be successfully decoded, thereby improving the performance gain of mutual error correction between the transport blocks.

This invention relates to the field of automation control technology and discloses a method for coordinated flow and pressure control under deep well high-pressure fluid operation conditions. The method includes: acquiring parameters from the power actuator and pressure feedback from the controlled system to establish a state feature vector; generating a control sequence containing flow control and pressure compensation components using a virtual cross-impedance decoupling model; superimposing an coded signal as a logic probe into the command and extracting the dynamic phase angle difference using the feedback residual; calibrating the transmission channel time constant based on the phase angle difference and performing time-domain shifting and alignment on the pressure compensation component; adjusting the power actuator while simultaneously controlling the output of the regulating actuator to provide a counter-current signal. This invention transforms variable coupling into non-interfering logic channels through virtual impedance decoupling, eliminating oscillations induced by loop interference; and using an endogenous excitation calibration mechanism to sense transmission characteristics, solving the compensation phase deviation caused by material property drift, and ensuring stable pressure convergence.

The invention belongs to the technical field of underwater acoustic communication, and relates to an underwater acoustic OFDM (Orthogonal Frequency Division Multiplexing) downlink communication multiple access method based on polarization code superposition coding. The method comprises the following steps: determining an optimal signal-to-noise ratio according to a required code rate, and calculating a Bhattacharyya parameter logarithm value of each sub-channel under the optimal signal-to-noise ratio; performing ascending sorting on the sub-channels according to the Bhattacharyya parameter logarithm value, and selecting an information bit position distribution set; dividing the sub-channels in the set into a plurality of subsets according to a recording sequence, and respectively distributing the subsets to different users; carrying out interleaving scrambling, constellation mapping and OFDM modulation on code words coded by a user to obtain time domain signals of the code words; superposing the time domain signals of the two users to obtain a sending signal of the main node; and decoding the received signal at a receiving end. According to the method provided by the invention, the fairness of the communication quality of a plurality of users is realized, the bit error rate is reduced, and under the condition that the signal-to-noise ratio difference is large enough, fair resource allocation is realized among the plurality of users, and the data transmission efficiency is improved.

The invention discloses a multi-beam digital transmission metasurface design method adaptive to direct communication of the Internet of Vehicles. The metasurface works in a 5.9 GHz frequency band and is composed of 40 * 40 double-C-shaped slot loading units, 2-bit transmission phase coding is achieved by adjusting inner-layer slot parameters of the units, and the transmission amplitude is superior to-2dB. According to the design, a quadrant partition beam forming method is adopted, an array is divided into four sub-regions, superposition codes of a focusing phase and a specific deflection phase are loaded respectively, and therefore four symmetrically-distributed high-gain beams are synchronously generated. Simulation results show that main beams of the array respectively point to azimuth angles of 45 degrees, 135 degrees, 225 degrees and 315 degrees, pitch angles are all 30 degrees, the maximum gain reaches 14.2 dBi, the narrow-beam and low-sidelobe characteristics are achieved, and the problem of efficient coverage of one source and multiple directions in an Internet of Vehicles scene is effectively solved.

Provided are a data transmission method and a communication device, the method relating to the technical field of communications, the method comprising: a terminal device sending first data, the first data being encoded by using a first encoding mode; and the terminal equipment sends second data, wherein the second data is determined by carrying out LDGM superposition coding according to a plurality of to-be-retransmitted first data blocks in the first data. Through the method and the device, the overhead of data block retransmission resources can be reduced under the condition of limited resources and limited data packet delay budget.

The invention relates to the technical field of automatic control, and discloses a flow pressure coordinated regulation and control method under the working condition of deep well high-pressure fluid operation, which comprises the following steps: acquiring parameters of a power execution end and pressure feedback of a controlled system to establish a state feature vector; generating a regulation and control sequence containing a flow control component and a pressure compensation component by using a virtual cross impedance decoupling model; superposing a coded signal in the instruction to serve as a logic probe, and extracting a dynamic phase angle difference by using a feedback residual error; calibrating a transmission channel time constant according to the phase angle difference and implementing time domain translation alignment on the pressure compensation component; according to the method, variable coupling is converted into non-interfering logic channels through virtual impedance decoupling, and oscillation induced by loop intervention is eliminated; an endogenous excitation adjustment mechanism is used for sensing transmission characteristics, compensation phase deviation caused by physical property drift is solved, and stable convergence of pressure is ensured.

Provided in the present application are a data transmission method and a communication apparatus. The method relates to the technical field of communications, and comprises: a terminal device sending first data, wherein the first data is encoded in a first encoding mode; and the terminal device sending second data, wherein the second data is determined by means of performing LDGM superposition coding on a plurality of first data blocks to be retransmitted in the first data. The present application facilitates a reduction in the overheads of data block retransmission resources under the conditions of limited resources and a limited packet delay budget.