Comparing Decoding Performance of LDPC Codes and Convolutional Codes for Short Packet Transmission

2019 ◽  
Author(s):  
Yi Deng ◽  
Ming Zhan ◽  
Meng Wang ◽  
Chao Yang ◽  
Xiaohong Luo ◽  
...  
Keyword(s):  
Ldpc Codes ◽  
Convolutional Codes ◽  
Packet Transmission ◽  
Short Packet

Pilot-Less Sparse Vector Coding for Short Packet Transmission

2019 ◽  
Vol 8 (4) ◽  
pp. 1036-1039 ◽  
Author(s):  
Hyoungju Ji ◽  
Wonjun Kim ◽  
Byonghyo Shim
Keyword(s):  
Packet Transmission ◽  
Vector Coding ◽  
Sparse Vector ◽  
Short Packet

scholarly journals A Survey on Transmission Schemes on Large-Scale Internet of Things with Nonorthogonal Multiple Access

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Wenyu Zhou ◽  
Rui Zhao ◽  
Fusheng Zhu ◽  
Lijia Lai ◽  
Xutao Li
Keyword(s):  
Internet Of Things ◽  
Wireless Communication ◽  
Channel Estimation ◽  
Multiple Access ◽  
Large Scale ◽  
Packet Transmission ◽  
Data Detection ◽  
Active User ◽  
Comprehensive Survey ◽  
Short Packet

This paper performs a comprehensive survey on transmission schemes for the large-scale Internet of things (IoT) networks with nonorthogonal multiple access (NOMA). By solving the interference among users, NOMA can significantly improve the frequency reuse efficiency and support multiple users to use the same frequency resources. It is considered to be one of the most effective technologies for the next-generation wireless communication. However, there are still many challenges on the transmission schemes for the large-scale NOMA system, including the short-data packet transmission, active user detection, channel estimation, and data detection. In order to meet these challenges, this paper first reviews the short-packet transmission in the large-scale NOMA systems and then reviews the active user detection and channel estimation technologies of the considered systems.

Relay-assisted secure short-packet transmission in cognitive IoT with spectrum sensing

2021 ◽  
Vol 18 (12) ◽  
pp. 37-50
Author(s):  
Yong Chen ◽  
Yu Zhang ◽  
Baoquan Yu ◽  
Tao Zhang ◽  
Yueming Cai
Keyword(s):  
Spectrum Sensing ◽  
Packet Transmission ◽  
Short Packet

Hybrid Arq Type I Based On Convolutional Code

2012 ◽  
Author(s):  
Hazilah Mad Kaidi ◽  
Muhammad Ibrahim
Keyword(s):  
Error Correction ◽  
Error Control ◽  
Convolutional Code ◽  
Convolutional Codes ◽  
Packet Transmission ◽  
Type I ◽  
Hybrid Arq ◽  
Convolutional Coding ◽  
Error Correction Capability ◽  
Control Scheme

Hibrid Automatik Permintaan Ulangan (HARQ), sejenis kaedah mengawal kesilapan berdasarkan pada kod konvolutional di penghantaran paket merentasi saluran tanpa wayar telah dikemukakan. Analisis prestasi daya pemprosesan dan kadar–bit–silap (BER), merujuk kepada simulasi panjang kekangan yang berbeza (K=3 dan K=4) dan kadar kod (1/2 dan 1/3) di kod konvolutional pada HARQ jenis I telah dipersembahkan. Beberapa kebolehupaya kesilapan pembetulan disediakan pada setiap penghantaran semula paket dan maklumat yang boleh dibaiki semula dengan sendiri dari setiap penghantaran atau penghantaran semula jikalau kesilapan adalah berada di antara julat kebolehupaya pembetulan kesilapan. Simulasi HARQ adalah terhad kepada tiga penghantaran semula bagi setiap satu SNR dalam beberapa kali perulangan. Kata kunci: Istilah–Hibrid ARQ; ARQ; pengkodan konvolusional; kawalan kesilapan A Hybrid Automatic Repeat reQuest (HARQ), error control scheme based on a convolutional code for packet transmission over wireless channels was proposed. The analysis of the throughput and bit–error rate (BER) performance, according to the different constraint lengths (K=3 and K=4) and code rate (1/2 and 1/3) of convolutional codes on HARQ type I simulation scheme are presented. Certain error correction capability is provided in each (re)transmitted packet, and the information can be recovered from each transmission or retransmission alone if the errors are within the error correction capability. Simulation of HARQ is limited up to three retransmissions for each SNR in several iterations. Key words: Terms–Hybrid ARQ; ARQ; convolutional coding; error control

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