Communication Archives - Student Notes

Practical C Code Snippets for Beginners

Posted by admin on Jul 1, 2026 in Communication | 0 comments

Quadratic Equation Solver in C

This program calculates the roots of a quadratic equation based on user-provided coefficients a, b, and c. It handles real, equal, and complex roots.

#include <stdio.h>
#include <math.h>

int main() {
    double a, b, c;
    double discriminant, root1, root2, realPart, imagPart;

    printf("Enter coefficients a, b and c: ");
    scanf("%lf %lf %lf", &a, &b, &c);

    discriminant = b * b - 4 * a * c;

    if (discriminant > 0) {
        root1

Fourier Series Properties and Laplace Transform Essentials

Posted by admin on Jun 29, 2026 in Communication | 0 comments

Fourier Series Properties

1. Linearity

Statement: If x₁(t) ↔ aₖ and x₂(t) ↔ bₖ, then Ax₁(t) + Bx₂(t) ↔ Aaₖ + Bbₖ.

Explanation: Fourier series follows the principle of superposition. Adding two periodic signals results in the addition of their respective Fourier coefficients. This is used to simplify complex signals by breaking them into simpler components.

2. Time Shifting

Statement: If x(t) ↔ aₖ, then x(t − t₀) ↔ aₖ e^(-jkω₀t₀).

Explanation: Shifting a signal in

C Programming: Mastering Unix Processes and IPC

Posted by admin on Jun 25, 2026 in Communication | 0 comments

Process Management with Grep

#define _POSIX_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/wait.h>
#include <sys/types.h>

int main(int argc, char *argv[]) {
    int i, pid;
    if (argc < 2) {
        fprintf(stderr, "Uso: padre [<archivo>]+\n");
        return EXIT_FAILURE;
    }
    for (i = 1; i < argc; i++) {
        switch (pid = fork()) {
            case -1:
                fprintf(stderr, "Error al crear el hijo\n"

Practical C Language Code Snippets and Exercises

Posted by admin on Jun 15, 2026 in Communication | 0 comments

1. Simple Program (Hello World)

#include <stdio.h>
int main() {
    printf("Hello World");
    return 0;
}

2. Celsius to Fahrenheit

#include <stdio.h>
int main() {
    float c, f;
    printf("Enter C: ");
    scanf("%f", &c);
    f = (1.8 * c) + 32;
    printf("F = %f", f);
    return 0;
}

3. Largest of Three Numbers (Nested if-else)

#include <stdio.h>
int main() {
    int a, b, c;
    printf("Enter 3 numbers: ");
    scanf("%d%d%d", &a, &b, &c);
    if (a > b) {

akfewklnlk

Posted by admin on May 28, 2026 in Communication | 0 comments

Q1Challenges of implementing cognitive radio networks▾

1. Spectrum Sensing Accuracy:

Missed detection: CR doesn’t detect a primary user who is present → CR transmits → causes interference to the licensed user. Legally problematic.
False alarm: CR thinks primary is present when it isn’t → abandons perfectly good spectrum unnecessarily → wastes the opportunity.
Achieving both low false alarm rate AND low missed detection simultaneously is mathematically difficult — tradeoff governed by the

Communication Theory and Rhetoric: Core Concepts

Posted by admin on May 19, 2026 in Communication | 0 comments

Unit 1: Communication

The word communication derives from the Latin communicare, meaning to share, exchange, or put in common. It is linked to the concept of community. Originally defined as the passing of ideas, information, and attitudes, the term has expanded to include physical channels and modern technological inventions. With over 126 definitions across disciplines like psychology and sociology, scholars like Dance, Littlejohn, and Foss suggest viewing it as a “family of concepts.”

Characteristics

« Older Entries