Questions & Answers on Modulation

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What is OQPSK Modulation?

Nov 6, 2022

Figure 1: OQPSK Constellation DiagramOffset Quadrature Phase Shift Keying (OQPSK) is a variant of the QPSK modulation scheme where the phase or timing of either the in-phase or Quadrature component is...read more

What is GFSK Modulation?

Modulation

Editorial Team

Dec 13, 2022

Gaussian Frequency Shift Keying or GFSK is an extension of the FSK modulation scheme where the frequency of the modulated signal will not instantaneously change at the beginning of each symbol period ...read more

What is 4096-QAM?

Modulation

Editorial Team

Jul 21, 2022

4096-QAM is a subset of the Quadrature Amplitude Modulation (QAM) scheme in which a carrier waveform of fixed frequency can exist in one of 4096 possible discrete and measurable states in the constell...read more

What is 16-QAM Modulation?

Modulation

Editorial Team

Jul 19, 2022

Figure 1: Constellation Plot for 16-QAM16-QAM is a type of Quadrature Modulation (QAM) in which a carrier wave of a fixed frequency can exist in one of sixteen different states. This can be represente...read more

What is QAM or Quadrature Amplitude Modulation?

Modulation

Editorial Team

Jul 19, 2022

Quadrature Amplitude Modulation or QAM is a digital modulation scheme where data is transmitted over the channel by varying both the amplitude and phase of the high-frequency carrier signal. The trans...read more

What is 64-QAM Modulation?

Modulation

Editorial Team

Jul 19, 2022

64-QAM is a type of Quadrature Modulation (QAM) in which a carrier wave of a fixed frequency can exist in one of sixty-four different discrete and measurable states in the constellation plot. The cons...read more

What is DFT-S-OFDM?

Modulation

Editorial Team

May 12, 2023

DFT-S-OFDM or Discrete Fourier Transform-Spread-Orthogonal Frequency Division Multiplexing is a single carrier-based transmission scheme that is utilized in the uplink of LTE and 5G NR wireless system...read more

What is 256-QAM Modulation?

Modulation

Editorial Team

Jul 21, 2022

256-QAM is a type of Quadrature Amplitude Modulation (QAM) in which a carrier wave of constant frequency can exist in one of 256 different discrete and measurable states in the constellation plot. The...read more

What is 1024-QAM?

Modulation

Editorial Team

Jul 21, 2022

1024-QAM is a type of higher-order Quadrature Amplitude Modulation (QAM) technique in which a carrier waveform of fixed frequency can exist in one of 1024 possible discrete and measurable states in th...read more

What is OFDM?

Modulation

Editorial Team

Feb 20, 2023

Orthogonal Frequency Division Multiplexing or OFDM is a digital, multi-carrier data transmission scheme where a single stream of data or binary stream of data is split among multiple closely spaced na...read more

What is CP-OFDM?

Modulation

Editorial Team

May 11, 2023

CP-OFDM or Cyclic Prefix-Orthogonal Frequency Division Multiplexing, is an improvement on the OFDM technique designed to reduce the effects of Intersymbol Interference (ISI) and enable simplified sign...read more

What is SOQPSK Modulation?

Modulation

Editorial Team

Apr 27, 2024

Spectrally Efficient Offset Quadrature Phase Shift Keying (SOQPSK) is a modulation scheme that has been designed to optimize the efficiency and reliability of wireless data transmissions. It provides ...read more

What is Coded-OFDM?

Modulation

Editorial Team

Mar 25, 2023

Coded Orthogonal Frequency Division Multiplexing or Coded-OFDM, is an enhancement to the OFDM modulation scheme, where forward error correction (FEC) coding is applied before the signal transmission t...read more

What is OFDMA?

Modulation

Editorial Team

Mar 12, 2023

OFDMA or Orthogonal Frequency Division Multiple Access, is a multi-user version of the popular OFDM multi-carrier digital modulation scheme. OFDMA is a modulation scheme that is used by the Wi-Fi 6 (o...read more

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