Posts

Obsidian setup for personal note
setup
Summary: Previously, I have used Notion to write documents. However, as the number of contents is getting bursty, it is hard to organize them. Also, another problem is that…

3GPP Documents
참고자료 : https://www.3gpp.org/news-events/3gpp-news/sa2-artcle

Abstract Lagrangian
ML
An optimization method to find local minima or maxima of integer/combinatorial problems efficiently.

Dinkelbach Method
ML
Dinkelbach method is used to solve a fractional programming problem, especially for convex nonlinear fractional programming (NLFP) by successively solving a sequence of…

Macbook Setup
Setup
Summary: A note for my Macbook setup.

Hessian Matrix in ML
ML
In this post, approximation methods for Hessian matrix are summarized (See also PRML chapter 5)

Bartlett’s second identity
ML
The Bartlett’s identities are related to expectations of \(n\)-th derivatives of the log-likelihood function.

Mirror descent
ML
The mirror descent is an iterative optimization algorithm for finding a local minima of a differentiable function.

Conjugate Duality
ML
Conjugation duality is used to solve non-linear optimization problems (including indicator functions), using a duality property between auxiliary variables.

Useful Git Commands
Study
git config --global user.email "your mail"
git config --global user.name "your name"
git config --global core.editor vim


git init # 맨처음
git status # 변경파일 리스트
git add <file> …

PDF to EPS in MacOS
Study
Convert PDF file to EPS file in MacOS

Convert ipynb to markdown
Study
In this post, I introduce two libraries converting markdown and ipynb

Vision Transformer
ML
Paper: https://arxiv.org/pdf/2010.11929.pdf

Part 2: Differentiable Communication Systems
This tutorial will guide you through Sionna, from its basic principles to the implementation of a point-to-point link with a 5G NR compliant code and a 3GPP channel model.…

Part 3: Advanced Link-level Simulations
This tutorial will guide you through Sionna, from its basic principles to the implementation of a point-to-point link with a 5G NR compliant code and a 3GPP channel model.…

Exercise 1
Simulate the coded bit error rate (BER) for a Polar coded and 64-QAM modulation. Assume a codeword length of n = 200 and coderate = 0.5.

Part 1: Getting Started with Sionna
This tutorial will guide you through Sionna, from its basic principles to the implementation of a point-to-point link with a 5G NR compliant code and a 3GPP channel model.…

Hello Sionna
ML
In this post, basic implemenation of the Sionna library is discussed.

Low Density Parity Check (LDPC) Codes (Part 1)
In this post, we explore the low-density parity check (LDPC) code in the 5G standard. The LDPC code is a linear block code with a sparse parity-check matrix, which is also…

Hamming Code
  • Video: https://www.youtube.com/watch?v=hn1H84V4ve0&list=PLyqSpQzTE6M81HJ26ZaNv0V3ROBrcv-Kc&index=10
  •

    Single Parity check code
    Consider a \((n,n-1)\) linear binary code

    Simulation for Uncoded BPSK
  • Link: video
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    What will be the 6G?
    study
    Paper: 6G takes shape
    Jan 16, 2024
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