{{Short description|Digital modulation type}} {{expert|Electronics|needs to be dumbed down and citations added after 15 years|date=March 2025}}
'''Higher-order modulation''' is a type of digital modulation usually with an order of 4 or higher. Common examples include quadrature phase-shift keying (QPSK) and m-ary quadrature amplitude modulation (m-QAM).<ref>{{cite web |last1=Wang |first1=Lan |last2=Dai |first2=Jun Yan |last3=Ding |first3=Ke Seng |last4=Zeng |first4=Hong Xin |last5=Cheng |first5=Qiang |last6=Yang |first6=Zi Qiang |last7=Zhang |first7=Ya Xin |last8=Cui |first8=Tie Jun |date=22 November 2024 |title=High-order direct modulation terahertz communications with a wideband time-coding metachip modulator |url=https://www.science.org/doi/10.1126/sciadv.adq8693 |access-date=25 July 2025 |website=science.org |publisher=Science Advances |pages=eadq8693 |doi=10.1126/sciadv.adq8693}}</ref>
These schemes transmit more bits per symbol, resulting in higher data rates and improved throughput. They also enhance bandwidth efficiency and can be realized through methods such as Quadrature Amplitude Modulation (QAM), which combines two Pulse Amplitude Modulation (PAM) signals in quadrature.<ref>{{Cite web |title=Higher-order modulation |url=https://taylorandfrancis.com/knowledge/Engineering_and_technology/Electrical_&_electronic_engineering/Higher-order_modulation/ |access-date=2025-09-14 |website=taylorandfrancis.com}}</ref>
==See also== * phase-shift keying
==References== {{Reflist}}
{{DEFAULTSORT:Higher-Order Modulation}} Category:Quantized radio modulation modes
{{Electronics-stub}}