Search content

Defining the field: processing, transmission, and switching of information.

Understanding the characteristics of continuous signals: amplitude, period, and frequency.

Analyzing signals in the frequency domain and understanding signal bandwidth.

Visualizing digital information as a series of voltage levels over time.

The basis of wireless communication and the electromagnetic spectrum.

Key units in telecommunications, including decibels (dBm, dBr) and information units (bit, byte).

From information source to destination: the complete path of a signal.

Simplex, half-duplex, and full-duplex communication explained.

Understanding additive (noise) and multiplicative (fading) disturbances.

Measuring performance with Bit Error Rate (BER) and energy efficiency (Eb/N0).

The building blocks of a network: end devices, intermediary devices, and media.

Roles of hosts, clients, servers, routers, switches, and firewalls.

Classification by scale: PAN, LAN, MAN, and WAN.

Physical and logical layouts: Bus, Star, Ring, Mesh, Tree, and Full Mesh.

Applying concepts like graph degree, paths, and connectivity to network analysis.

The principle of dividing complex communication tasks into manageable layers.

A deep dive into the 7 layers of the Open Systems Interconnection reference model.

Exploring the 4-layer practical model that powers the Internet.

How data is wrapped with headers and trailers as it moves through the network layers.

Fundamental building blocks of digital circuits: AND, OR, NOT, XOR gates and their truth tables.

Sequential logic circuits that store binary information: SR, JK, D, and T flip-flops.

Digital storage devices composed of flip-flops: shift registers, parallel registers, and their applications.

Sequential circuits that count pulses: binary counters, decade counters, and up/down counters.

Basic memory components in digital systems: latches, SRAM, DRAM, and ROM types.

The first step of A/D conversion: the Nyquist-Shannon sampling theorem.

Converting continuous sample amplitudes into discrete levels and the resulting quantization noise.

Non-linear quantization using A-law and µ-law to improve SNR for low-amplitude signals.

The fundamental technique for digital representation of analog signals, like voice.

A simple 1-bit differential coding technique, including its adaptive variants (ADM).

Advanced differential coding using multi-bit quantization for better compression.

An overview of indirect (e.g., integrating) and direct (e.g., flash) conversion techniques.

The fastest ADC architecture: parallel conversion using comparators.

High-precision conversion using single-slope and dual-slope integration methods.

A widely used method balancing speed and resolution via iterative comparisons.

Converting digital words to analog signals using a weighted resistor network.

A precise and practical DAC architecture using a ladder of only two resistor values.

Transforming binary data into physical signals for transmission (NRZ, RZ, Manchester, AMI, HDB-3).

Using pseudo-random sequences (PRBS) to ensure clock recovery and eliminate DC component.

Advanced clock recovery techniques including PLL architectures, jitter performance, and implementation considerations.

Techniques for extracting the timing signal from the received data stream.

The basics of Non-Return-to-Zero line coding and its spectral properties.

Understanding Return-to-Zero codes and how they improve clock recovery.

A self-clocking line code used in Ethernet with built-in transitions.

Alternate Mark Inversion: a bipolar code that eliminates DC component.

High-Density Bipolar 3-zero code, an enhancement of AMI that avoids long zero sequences.

Coded Mark Inversion, a line code providing excellent clock recovery features.

Redundant codes like 1b/2b or 3b/4b used in fiber optics to ensure DC balance and synchronization.

Concepts of redundancy, ARQ (feedback) and FEC (forward error correction).

A simple error detection method based on counting the number of ones.

The simplest form of FEC based on majority voting.

A classic single-error correcting, double-error detecting block code.

A powerful error-detection technique based on polynomial division.

The core concept of impressing information onto a high-frequency carrier wave.

Varying the amplitude of the carrier wave. Exploring DSB-WC, DSB-SC, and SSB.

Varying the frequency of the carrier. Concepts of deviation and modulation index.

Varying the phase of the carrier wave and its relationship with FM.

Digital modulation by switching between discrete amplitude levels.

Digital modulation by switching between discrete frequency levels.

The general principle of digital modulation by shifting the phase of the carrier.

Visualizing digital modulation schemes in the I-Q plane.