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Category: Wireless/SDR

Wireless communications and Software Defined Radio (SDR)

Region where likelihood function is non-zero
June 20, 2022 Wireless/SDR

Maximum Likelihood Estimation of Clock Offset

When I started my PhD, one of the first papers I read was On Maximum Likelihood Estimation of Clock Offset

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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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Linear interpolation between pilot subcarriers
July 18, 2022 Wireless/SDR

Channel Estimation in OFDM Systems

Channel estimation in single-carrier systems has been described in a previous article. In OFDM systems, each subcarrier acts as an

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Time domain formation of a Raised Cosine pulse for unity excess bandwidth
January 17, 2022 Wireless/SDR

How Excess Bandwidth Governs Timing Recovery in Digital Communication Systems

In the article on pulse shaping, we described the excess bandwidth, also known as roll-off factor, as the extra fractional

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Error Vector Magnitude (EVM) for 1 symbol
May 30, 2022 Wireless/SDR

What is Error Vector Magnitude (EVM)?

Measuring the performance of a digital communication system is not a straightforward task as different impairments have different impacts on

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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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