QAM Insights | Sumble

What is QAM?

Quadrature Amplitude Modulation (QAM) is a digital modulation technique where data is encoded by varying both the amplitude and phase of a carrier signal. It's widely used in modern communication systems, including cable television, digital radio, and high-speed internet, due to its ability to transmit more data within a given bandwidth compared to simpler modulation schemes.

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What other technologies are related to QAM?

QAM Competitor Technologies

FSK

FSK (Frequency-Shift Keying) is another digital modulation technique. While QAM uses both amplitude and phase, FSK uses frequency variations to represent data. Thus, they are alternative modulation schemes.

mentioned alongside QAM in 58% (216) of relevant job posts

QPSK

QPSK (Quadrature Phase-Shift Keying) is a specific type of phase shift keying. It is a form of digital modulation technique similar to QAM. QAM can be seen as a generalized form of QPSK.

mentioned alongside QAM in 52% (208) of relevant job posts

PSK

PSK (Phase-Shift Keying) is a digital modulation technique where data is represented by changing the phase of a carrier signal. QAM is a more spectrally efficient modulation scheme compared to PSK, but they both serve the purpose of modulating digital information onto a carrier wave. QAM can be seen as a superset of PSK.

mentioned alongside QAM in 45% (204) of relevant job posts

APSK

APSK (Amplitude and Phase-Shift Keying) is a modulation scheme that combines amplitude and phase modulation. While APSK and QAM are related, QAM has a simpler rectangular constellation compared to the ring-based constellation of APSK, which can affect implementation complexity and performance.

mentioned alongside QAM in 80% (89) of relevant job posts

BPSK

BPSK (Binary Phase-Shift Keying) is the simplest form of PSK, where only two phases are used. QAM can be viewed as a more advanced modulation scheme with higher spectral efficiency compared to BPSK.

mentioned alongside QAM in 47% (107) of relevant job posts

ASK

ASK (Amplitude-Shift Keying) is a digital modulation technique that represents data by varying the amplitude of a carrier signal. While QAM also uses amplitude modulation, it combines it with phase modulation for increased data rates, making ASK an alternative modulation scheme.

mentioned alongside QAM in 25% (51) of relevant job posts

QAM Complementary Technologies

OFDM

OFDM (Orthogonal Frequency-Division Multiplexing) is a modulation technique that divides a high-bandwidth channel into multiple narrowband subcarriers. QAM can be used to modulate each of the subcarriers in an OFDM system. Therefore, they are often used together.

mentioned alongside QAM in 19% (223) of relevant job posts

OFDMA

OFDMA (Orthogonal Frequency-Division Multiple Access) is a multi-user version of the OFDM digital modulation scheme. QAM can be used to modulate each of the subcarriers in an OFDMA system.

mentioned alongside QAM in 16% (55) of relevant job posts

RF

RF (Radio Frequency) is a general term for electromagnetic frequencies used in wireless communication. QAM is a modulation technique often used in RF communication systems.

mentioned alongside QAM in 1% (192) of relevant job posts