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Multiple paths arriving at the Rx with different strengths and delays
May 9, 2022 Localization

Carrier Phase-Based Ranging in Indoor Multipath Channels

Indoor positioning is one of the core technologies behind the idea of Internet of Things (IoT). Some of the use

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A composite channel model consisting of a pulse shaping filter, baseband channel and a matched filter
April 18, 2022 Wireless/SDR

Channel Estimation in Wireless Communication

Channel estimation is a special case of the system identification problem that has a long history in the field of

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Spectrum of the Nyquist pulse and its symbol rate shifted version exhibit a spectral null at 0.5 symbol rate for a 0.5 timing offset
April 11, 2022 Wireless/SDR

Why the Performance of an Equalizer Depends on Symbol Timing Phase

This post is written on an advanced topic mainly for practitioners and researchers in the design of wireless systems. For

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Multiple stable lock points in the S-curve of a decision-directed loop
April 4, 2022 Wireless/SDR

Resolving Phase Ambiguity through Unique Word and Differential Encoding and Decoding

In the context of carrier synchronization, we have discussed the Costas loop and other techniques before. Today, we discuss the

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Regression and classification in supervised learning
May 16, 2022 Machine Learning

What is Supervised Learning?

In a previous article, we had a little introduction to the big picture of machine learning. More than what is

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Wireless Communications from the Ground Up - An SDR Perspective
Learn about Wireless Communications and SDR 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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