Wireless Communication

Pilots and Least Squares work

by ComputingNotes
BPSK (Binary Phase Shift Keying), a fundamental digital modulation scheme. A receiver uses a simple technique called Least Squares (LS) Channel Estimation to defeat fading and multipath interference. Wireless Channel In this simulation, the channel is designed to be intentionally difficult. It includes two major issues of digital signals: The Transmission Strategy: The Pilot Block ... Read More

pskmod, awgn, rayleigh – matlab

by ComputingNotes
Notes from – pskmod: Modulate signal using M-PSK method https://au.mathworks.com/help/comm/ref/pskmod.html The pskmod function performs M-ary Phase Shift Keying (M-PSK) modulation, converting input symbols (X) into a complex baseband signal (Y). Key Syntax data = randi([0 M-1], 1000, 1); txSig = pskmod(data, M, pi/M); Adding fading to simulation models a more complex and realistic wireless channel ... Read More

Channel Estimation

by ComputingNotes
The goal is to solve for H (the Channel) in the equation: Y=H⋅X+N (Received Signal = Channel × Transmitted Signal + Noise) [1]W. Shen, “Deep Learning-Enabled Channel Estimation for Reconfigurable Intelligent Surfaces-Aided Wireless Communications”. 1. Pilot Insertion (The “Known” Data) The receiver cannot estimate the channel using random user data because it doesn’t know what ... Read More

Channel Estimation

by ComputingNotes
https://au.mathworks.com/help/lte/ug/channel-estimation.html There are various factors that affect wireless signals. A phone may try to connect to a tower station, but multiple factors such as being in basement, being in moving train etc., the connection might be lost. This is due to the change in the channel of wireless communication system. Now the question is, can ... Read More

Learning Joint Detection, Equalization and Decoding for Short-Packet Communications – Paper Notes

by ComputingNotes
S. Dörner, J. Clausius, S. Cammerer, and S. ten Brink, “Learning Joint Detection, Equalization and Decoding for Short-Packet Communications,” IEEE Transactions on Communications, vol. 71, no. 2, pp. 837–850, Feb. 2023, doi: 10.1109/TCOMM.2022.3228648. A machine learning-based approach for joint detection, synchronization, equalization, and decoding in short-packet wireless communications, where messages must first be detected before ... Read More

Coorperative Communication

by ComputingNotes
D. K. Lee and K. M. Chugg, “A Pragmatic Approach to Cooperative Communication,” in MILCOM 2006 – 2006 IEEE Military Communications conference, Oct. 2006, pp. 1–7. doi: 10.1109/MILCOM.2006.301987. $z[k] = \sum_{n=1}^N A_{n,[k]} e^{j\Theta_n[k]} s[k] \quad = C[k] e^{j\Phi[k]} s[k]$

Terms and Terminologies in Wireless Communication

by ComputingNotes
Channel Fading: Signal experiencing fluctuations in amplitudehttps://www.geeksforgeeks.org/computer-networks/fading-in-wireless-communication/ https://www.sciencedirect.com/topics/engineering/fading-channel Signal Attenuation: Natural Loss of signal strength that occurs as a signal travels through medium or over a distance.https://en.wikipedia.org/wiki/Attenuationhttps://www.sciencedirect.com/topics/computer-science/signal-attenuation Binary Phase Shift Keying (BPSK):– represent digital data using phase; this technique -> phase shift keying (PSK)– Type of PSK -> binary phase shift keying (BPSK): use of ... Read More
error: