LDPC-for-5G-NR

Low-Density Parity-Check codes for 5G New Radio | Mentor : Prof. Yash Vasavda

Overview

This project implements and analyzes Low-Density Parity-Check (LDPC) codes over an AWGN channel using BPSK modulation. Both hard decision and soft decision decoding are implemented via message passing on a Tanner graph. The objective is to evaluate decoding performance (BER) across varying Eb/N0 levels and compare it with the Shannon limit and normal approximation.

Content

• LDPC encoding using a user-defined parity-check matrix H
• BPSK modulation and demodulation
• Simulation over Additive White Gaussian Noise (AWGN) channel
• Hard decision decoding (Bit-Flipping)
• Soft decision decoding (Belief Propagation)
• Tanner graph construction and iterative message passing
• BER vs Eb/N0 performance plotting
• Comparison with theoretical performance benchmarks

References

• NPTEL-NOC IIT Course: LDPC and Polar Codes in 5G Standard by Prof. Andrew Thangraj
• An Introduction to Low-Density Parity-Check Codes by Paul H. Siegel, Electrical and Computer Engineering University of California, San Dieg
• Introduction to Low-Density Parity Check Codes by Brian Kurkosk
• CT-216 Introduction to Communication Systems Lecture Slides by Prof. Yash Vasavada, DAIICT Winter 2025
• Generalized Simplified Variable-Scaled Min Sum LDPC decoder for irregular LDPC Codes

Group Members (Group No.: 25)

• 202301269 - Bhagya Majithiya
• 202301270 - Ashka Pathak
• 202301272 - Dhruv Jain
• 202301273 - Jill Chhagnani
• 202301274 - Vansh Vaishnani
• 202301276 - Jevik Rakholiya
• 202301277 - Rujal Jiyani
• 202301278 - Dushyant Varshney
• 202301279 - Kathan Balar
• 202301280 - Lingampalli Venkata