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A block diagram for the implementation of a digital filter and square timing recovery for L=4 samples/symbol
July 9, 2016 DSP / Wireless/SDR

Digital Filter and Square Timing Recovery

We have seen before how a symbol timing offset severely impacts the constellation of the received symbols. Therefore, symbol timing

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A matched filter
July 8, 2016 DSP / Wireless/SDR

Convoluted Correlation between Matched Filter and Correlator

Now we turn out attention towards a topic that causes a lot of confusion for communications and DSP learners: what

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Universe
July 1, 2016 DSP

What is a Signal?

In traditional Digital Signal Processing (DSP) courses, we usually learn about signals in a narrow context. While this is probably

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Illustration of peak ISI and asymmetry about -3dB point
July 18, 2016 DSP / Wireless/SDR

Pulse Shaping Filter

From the previous articles, we have seen how a Tx generates a signal from the numbers and the Rx recovers

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Spectral efficiency R_b/B versus E_b/N_0 determines the overall merit of a modulation scheme. This figure is drawn for BER = 10^{-5} and a Square-Root Raised Cosine pulse with 50% excess bandwidth
June 1, 2016 Wireless/SDR

Computing Error Rates

Having built a simple digital communication system, it is necessary to know how to measure its performance. As the names

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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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