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Qasim Chaudhari

Qasim Chaudhari writes about wireless communications and signal processing at https://wirelesspi.com. After obtaining a PhD in Electrical Engineering from Texas A&M University, he has mostly worked on DSP algorithms development for real world demonstrations of wireless systems such as a MIMO-OFDM testbed, low-SNR receiver and phase of arrival based localization. His current venture is experimentation on extracting the range of a wireless device from the communication signal for some particular modulation schemes.

Beamforming in 5G Cellular Systems: A Tutorial

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Cellular networks have to minimize the interference among network users in addition to maximizing their individual data rates. From this perspective, beamforming is the core technology behind the design of the 5G physical layer. In this tutorial, we start from the basic signals and build the fundamental ideas on which physical and virtual beamforming methodologies are based. We will explore how its integration with massive MIMO leads to a simple yet efficient system. No prior DSP knowledge is required to understand the concepts.

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Live Q&A with Qasim Chaudhari - Beamforming in 5G Cellular Systems: A Tutorial

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Live Q&A with Qasim Chaudhari about his talk titled "Beamforming in 5G Cellular Systems: A Tutorial"

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Timing Synchronization in Software Defined Radios (SDR) (2020)

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A Software Defined Radio (SDR) merges the two fields of digital communication and digital signal processing into an efficient implementation of transmitters and receivers. One outcome of this combination is an interesting perspective on how timing synchronization is performed in digital communication receivers. This session will explain the timing synchronization problem in both time and frequency domains and then discuss in detail a timing locked loop consisting of timing error detectors, loop filter, interpolation and interpolation control. Insights into the relation of timing synchronization with general receiver design will also be presented.

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