DICTIONARY
Common terms & acronyms used in wireless industry
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OBW - Occupied Bandwidth -
The bandwidth containing 99% of the total integrated power
of the transmitted spectrum, centered on the assigned
channel frequency.
oDAS - Outdoor Distributed Antenna System -
DAS Deployed in an outdoor setting
OFDM – Orthogonal Frequency Division Multiplexing -
A frequency division multiplexing scheme encoding digital data
on multiple frequency channels to increase bandwidth and
decrease response time. OFDM techniques allow for densely
packed sub-carriers without the need for guard bands and
filters, increasing spectral efficiency and simplifying electronic
design. OFDM is especially good in severe channel conditions
where narrowband interference exists.
OQAM - Offset Quadrate Amplitude Modulation -
A group of digital modulation schemes that conveys two digital
bit streams by modulation the amplitude of carrier waves. The
carrier waves are of the same frequency but out of phase with
each other by 90 degrees, enabling simple demodulation at the
receiver.
OTA - Over-The-Air -
Testing the RF performance, demodulation, or RRM (radio
resource management) through the air interface, versus a
cabled connection; often performed in an anechoic chamber.
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