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Tag: Downsampling

A rectangular signal and its upsampled version in time and frequency domains
August 3, 2016 DSP

Sample Rate Conversion

In the discussion on sampling, the process of sampling a continuous-time signal was discussed in detail and subsequently sampling theorem

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A Phase Locked Loop (PLL) for digital symbol timing recovery
August 3, 2016 Wireless/SDR

Phase Locked Loop (PLL) for Symbol Timing Recovery

A Phase Locked Loop (PLL) is a device used to synchronize a periodic waveform with a reference periodic waveform. It

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Frequency domain beamforming implements a procedure for broadband signals that resembles the conventional narrowband beamformers
November 15, 2021 Wireless/SDR

Beamforming for Broadband Signals

Recall that classical or physical beamforming is based on calculating the differences in wave arrival times of a signal between

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Block diagram of a pulse amplitude modulator and demodulator
July 24, 2016 Wireless/SDR

Pulse Amplitude Modulation (PAM)

In the article on modulation – from numbers to signals, we said that the Pulse Amplitude Modulation (PAM) is an

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Minimum distance rule based detector decisions in a QPSK constellation in the presence of a carrier frequency offset
June 6, 2016 DSP / Wireless/SDR

How a Frequency Locked Loop (FLL) Works

We saw before how a carrier frequency offset distorts the received signal. Later, we also described the classification of frequency

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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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