MATLAB code for UWB modulation

 

We are aware that UWB is utilized for wireless communication over short distances. UWB is used in AirTag, RFID, etc., to keep track of your belongings. Keep your Apple AirTag in your backpack, or attach it with a key. Track your belongings with a mobile app. UWB transmitters use pulse width modulation and transmit data using extremely narrow pulses. Systems using UWB offer excellent potential for live tracking live and delivering very high data rates. Because of this, security is its primary usage (i.e., digital key, live monitoring of your stuff in the medical field, etc.).

UWB was previously covered in a different article on this site. Here, we'll mainly talk about the coding (using MATLAB) portion.

MATLAB Script:

%Written by Salim Wireless %Visit www.salimwireless.com for study materials on wireless communication %or, if you want to learn how to code in MATLAB clc; clear all; close all; t = 0:0.001:1; % 1 second of time with 0.001 second intervals starting at 0 seconds. fc = 3*10e9;; % % UWB ranges from 3 GHz to 10 GHz fm = 26*10e6; Amplitude_CarrierSignal = 5; % unit in volt Amplitude_MessageSignal = 2; % unit in volt carrier_signal = Amplitude_CarrierSignal.*sawtooth(2*pi*fc*t); message_signal = Amplitude_MessageSignal.*sin(2*pi*fm*t); n = length(carrier_signal); for i = 1:n if (message_signal(i)>=carrier_signal(i)) pulse_width_mod(i) = 1; else pulse_width_mod(i) = 0; end end % Message Signal figure('Name' , 'Pulse Width Modulation') subplot(3,1,1); plot(t,message_signal,'red'); xlabel('Time ----->'); ylabel('Amplitude ----->'); title('Message Signal'); legend('Message Signal ---->'); grid on; % Carrier Signal subplot(3,1,2); plot(t,carrier_signal, 'green'); xlabel('Sample ----->'); ylabel('Amplitude ----->'); title('Carrier Signal'); legend('Carrier Signal ---->'); grid on; % PWM Signal subplot(3,1,3); plot(t,pulse_width_mod,'black'); xlabel('Sample ----->'); ylabel('Amplitude ----->'); title('PWM Signal'); legend('PWM Signal ---->'); axis([0 1 0 2]); grid on;

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