O-RAN
What is O-RAN? O-RAN (hyphenated) specifically refers to the technical architecture and specifications produced by the O-RAN Alliance (founded 2018 by AT&T, China Mobile, Deutsche
O-RU / O-DU / O-CU
What is O-RU / O-DU / O-CU? O-RU, O-DU, and O-CU are the O-RAN compliant versions of the Radio Unit, Distributed Unit, and Centralised Unit
OAM Operations, Administration and Maintenance
This term refers to the procedures and functions involved in provisioning and managing a network or its components.
OBW – Occupied bandwidth
What is OBW? OBW (Occupied Bandwidth) is a spectrum measurement that defines the frequency bandwidth containing 99% of the total integrated mean power of the
OFDM – Orthogonal frequency division multiplexing
What is OFDM? OFDM is the multicarrier modulation technique at the heart of 4G LTE and 5G NR. It divides a wideband channel into hundreds
Open RAN
What is Open RAN? Open RAN is the movement to replace traditional closed, single-vendor RAN architectures with open, standardised interfaces between RAN components (RU, DU,
OQAM – Offset quadrate amplitude modulation
What is OQAM? OQAM (Offset QAM) is a digital modulation technique that staggers the in-phase (I) and quadrature (Q) components of a QAM signal by
OTA – Over-the-air
What is OTA? Over-the-Air (OTA) testing evaluates the RF performance of wireless devices through the radio interface without physical cable connections. OTA testing is mandatory
