Patents
Literature
4 results about "Channel code" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
Channel coding is referred to the processes done in both transmitter and receiver of a digital communications system. The mentioned processes require allocating extra bits, a.k.a. parity bits, and consuming extra bandwidth. Using this amount of communications resources results in more reliable connection between transmitter and its receiver. There are two policies to deal with channel coding: forward error correction automatic repeat-request FEC tries to discover the errors and correct them if it can. However, ARQ just discovers the error and sends a resend request to the transmitter. FEC-based methods are more complex in comparison with ARQ ones. Obviously, to use the benefits of two methods the combination of the above said policies is possible. Back to channel coding theory. There are two types of channel codes: block codes convolutional codes Block codes submit k bits in their inputs and forwards n bits in their output. These codes are frequently known as codes. Apparently, whatever coding scheme is, it has added n-k bits to the coded block. Contrary to block codes which are memoryless, convolutional codes are coding algorithms with memory.
A data broadcast method, a service server, a terminal device and a storage medium
The application discloses a data broadcast method, a service server, a terminal device and a storage medium. The method comprises the following steps: acquiring a plurality of service data of different service types to be broadcast, and determining a corresponding broadcast channel of each service data in a preset broadcast channel based on the service type of each service data in the plurality of service data; using a preset channel layer data protocol, performing channel coding on each service data based on the corresponding broadcast channel of each service data, to obtain a plurality of groups of single-channel data frames corresponding to the plurality of service data; using a preset link layer data protocol, performing link coding on the plurality of groups of single-channel data frames based on a preset channel priority of the corresponding broadcast channel of each service data, and determining the coded data as to-be-broadcast data; and performing data broadcast on the to-be-broadcast data through the preset broadcast channel. Through the technical scheme, the efficiency of data broadcast is improved.
Owner:CHINA MOBILE CHENGDU INFORMATION & TELECOMM TECH CO LTD +1
Impedance adjustment circuit and semiconductor apparatus including the impedance adjustment circuit
An impedance adjustment circuit includes a calibration circuit and a code update circuit. The calibration circuit performs an impedance adjustment operation to generate a source impedance code in response to activation of an impedance adjustment enable signal. The code update circuit performs a first channel code update operation to update a first channel impedance code according to the source impedance code when a first channel code update request signal is input, performs a second channel code update operation to update a second channel impedance code according to the first channel impedance code when a second channel code update request signal is input, and blocks the second channel code update operation when the second channel code update request signal is input while performing the first channel code update operation.
Owner:SK HYNIX INC
Permutation-equivariant neural channel coding construction
ActiveUS12647160B2Radio transmissionError prevention/detection by diversity receptionTheoretical computer scienceArtificial neuronal network
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless communication device may obtain a message vector. The wireless communication device may generate a set of message sub-vectors using the message vector. The wireless communication device may generate, using a common input linear layer, a set of message embedding vectors corresponding to the set of message sub-vectors. The wireless communication device may generate, using an artificial neural network, a set of codeword embedding vectors corresponding to the set of message embedding vectors. The wireless communication device may generate, using a common output linear layer and the set of codeword embedding vectors, a set of codeword sub-vectors permutation-equivariant relative to the set of message sub-vectors. The wireless communication device may combine the set of codeword sub-vectors to generate a codeword vector and may transmit a communication carrying the codeword vector.
Owner:QUALCOMM INC