Article directory Preface 1. What is channel coding? 2. Basic logic of channel coding-redundant data 1. Parity check code 2. Repeat code 3. Coding rate 4. Channel coding of 4G and 5G 1. Convolutional code 2. Viterbi decoding (Viterbi)-probabilistic decoding 3. LTE tail-biting convolutional code 4. LTE turbo code 5. MATLAB simulation 1.ploy2trellis function ①. […]
Tag: channel
Django3 framework-(3)-[Using websocket]: Using channels to implement websocket functions; simplified configuration and actual usage
Overview: I have written several blog posts before about how Django uses channels to implement websocket functions. With the use and actual maintenance of the project, the relevant processing methods have been reset. Generally speaking, the front and back ends only maintain a global connection and carry data to determine specific operations. The general business […]
Multi-channel IO-POll function, epoll server development process
Introduction “In computer network programming, multi-channel IO technology is a very common technology. Among them, the Poll function and the Epoll function are the two most commonly used multi-channel IO technologies. These two technologies can help the server handle the processing of multiple clients. Concurrent requests improve server performance. This article will introduce the use […]
32. Use waitgroup + channel to complete coroutine result recycling and aggregation
Article directory 1. Introduction to the use of waitgroup 1. Easy to use 2. Incorrect usage warning 1. The Add method is used in the wrong location 2. The Done method is used in the wrong location 3. Sub-coroutine closure uses external variables 2. waitGroup + channel completes data aggregation 1. Version 1 (defective) 2. […]
Solving PackagesNotFoundError: The following packages are not available from current channels nyoka
Table of Contents Resolving PackagesNotFoundError: The following packages are not available from current channels “nyoka” introduce Problem Description solution 1. Confirm package name and source 2. Add appropriate software package channels 3. Reinstall the package in conclusion Sample code: Machine learning model export using nyoka package Introducing: nyoka bag 1 Introduction 2. Main features 3. […]
Buffer channel and limit the number of goroutine concurrency
Article directory 3.7.1 Used as counting semaphore 3.7.2 Use cache channel + sync.WaitGroup to limit the number of concurrencies (similar to the previous section) To limit the concurrency of goroutine, Be sure to block the main goroutine! Be sure to block the main goroutine! Be sure to block the main goroutine! See the last example. […]
Fire channel occupancy detection system based on YOLOv5 based on GSConv+SlimNeck
1. Research background and significance Project ReferenceAAAI Association for the Advancement of Artificial Intelligence The smooth flow of fire escapes is crucial to the safety of personnel and property. However, in real life, due to various reasons, fire exits are often illegally occupied, resulting in fire vehicles being unable to reach the fire scene in […]
Linux restricts user permissions, JSch, ChannelSftp, ChannelExec, java.util.InterruptedException, /etc/ssh/sshd_config, setfacl
Problem background: Other systems need to get files on the server when requesting my interface, but I don’t want to give them to users with more permissions. So I want to create a new user sftpuser on Linux. This user can only download files from the directory and subdirectories I provided, and cannot perform other […]
ADC – Analog to digital conversion (single multiple channels and detailed examples of interrupt or DMA reading)
Article directory ADC – Analog to Digital Conversion ADC functional block diagram Voltage input range How to measure voltage exceeding 0~3.3V? Input channel Channel conversion sequence trigger source conversion time data register interrupt voltage conversion ADC initialization structure Code example 1-Independent mode-Single channel-Interrupt reading 2-Independent mode-Single channel-DMA read 3-Independent mode-Multi-channel-DMA reading 4-Dual mode-Multi-channel-Rule synchronization ADC […]
R language uses Markov chain to model channel attribution in marketing | With code data
Original link: http://tecdat.cn/?p=5383 Recently we were asked by a client to write a research report on Markov chains, including some graphical and statistical output. In this article, we look at what channel attribution is and how it relates to the concept of Markov chains We will also understand how this concept works theoretically and practically […]