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Tag: Aliasing

Two grating lobes on the sides
November 18, 2021 Wireless/SDR

How Do Beams Look Like?

In the article on classical beamforming, we discussed the interaction of the electromagnetic waves with the antenna array without any

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A view of time-frequency-space grid in a communication system
November 13, 2021 Wireless/SDR

How Multiple Antennas Sample the Signal

Once upon a time, an antenna was viewed as a simple device to transmit and receive an electromagnetic wave, much

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An atom and the solar system
November 15, 2016 DSP

Sampling and the Mysterious Scaling Factor

This post treats the signals in continuous time which is different than the approach I adopted in my book. The

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Complex sinusoids drawn to highlight the discrete frequency axis k on the left side
August 18, 2016 DSP

Discrete Frequency

An Analog to Digital Converter (ADC) samples a continuous-time signal to produce discrete-time samples. For a digital signal processor, this

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Computing noise power within a specified bandwidth
August 15, 2016 Wireless/SDR

Additive White Gaussian Noise (AWGN)

The performance of a digital communication system is quantified by the probability of bit detection errors in the presence of

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5G Physical Layer - An Easy Guide to Key Technologies
Learn about 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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