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Tag: Quadrature Phase Shift Keying (QPSK)

Eye diagram for a 4-QAM modulated signal and a simple channel impulse response
December 30, 2016 Wireless/SDR

Impact of Multipath on the Received Signal

In this article, we describe the impact of multipath caused by the wireless channel on the signal arriving at the

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Phase jumps at every zero crossing from modulating data onto the carrier phase for a QPSK waveform
October 7, 2016 Wireless/SDR

The Fundamental Problem of Synchronization

We have seen in the effect of phase rotation that the matched filter outputs do not map back perfectly onto

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A general QAM detector with respective waveforms at each block
October 7, 2016 Wireless/SDR

Quadrature Amplitude Modulation (QAM)

Quadrature Amplitude Modulation (QAM) is a spectrally efficient modulation scheme used in most of the high-speed wireless networks today. We

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MSK as a special case of both non-linear and linear modulation schemes
January 25, 2017 Wireless/SDR

Minimum Shift Keying (MSK) – A Tutorial

Minimum Shift Keying (MSK) is one of the most spectrally efficient modulation schemes available. Due to its constant envelope, it

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An illustration of wiping off the modulation process without any training information
August 11, 2016 Wireless/SDR

Non-Data-Aided Carrier Phase Estimation

A carrier phase offset rotates the Rx constellation causing decision errors even in a perfectly noiseless environment. One of the

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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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