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Tag: Complex Sinusoids

December 22, 2017 DSP

Interpreting Time Domain Derivative in Frequency Domain

Although this article explains the concepts in terms of mathematical constants e and j as well as integration, my book

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DTMF spectrum for key 6
August 15, 2022 DSP

How to Generate and Detect Dual Tone Multi-Frequency (DTMF) Signals

In the early days of telephone, you could not call anyone directly. Instead, a telephone operator used to sit on

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A DNA double helix
August 26, 2016 DSP

The Concept of Frequency

A wireless signal from one device to another travels through the use of electromagnetic waves propagated by an antenna. Electromagnetic

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A complex number with its I and Q components
July 4, 2016 DSP

Dealing with Complex Numbers

Although complex notation is not complex to understand, I attempt to avoid complex notation altogether while writing DSP articles. If

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Wireless Communications from the Ground Up - An SDR Perspective
Learn about wireless communications and SDR and 5G Physical Layer through great visualizations, simple maths and intuitive explanations
A wireless channel with speakers and microphone
Send and receive wireless signals over the air without expensive SDR hardware through a speaker (Tx) and a microphone (Rx)

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