MQTT & IOT AUTOMATION RESEARCH

modulation – Why does NB-IoT use standard QPSK in multi-tone transmission, when pi/4 QPSK is implemented for single-tone?

I’ve been studying the modulation schemes used in NB-IoT communication, with a particular focus on energy efficiency. I’ve noticed that QPSK (Quadrature Phase Shift Keying) is used in multi-tone transmission,…Read moremodulation – Why does NB-IoT use standard QPSK in multi-tone transmission, when pi/4 QPSK is implemented for single-tone?

RESEARCH

Sci-Hub | Digital coherent quadrature phase-shift-keying (QPSK). 2006 Optical Fiber Communication Conference and the National Fiber Optic Engineers Conference

Sci-Hub | Digital coherent quadrature phase-shift-keying (QPSK). 2006 Optical Fiber Communication Conference and the National Fiber Optic Engineers Conference | 10.1109/OFC.2006.215738 ◂ ↓ save Koc, U., Leven, A., Chen, Y.,…Read moreSci-Hub | Digital coherent quadrature phase-shift-keying (QPSK). 2006 Optical Fiber Communication Conference and the National Fiber Optic Engineers Conference