User's Manual

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FRCGroupProprietaryandConfidential
FRCWimaxoutdoorCPE–UserManualrev4.0
 ‐13‐
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1.2PRODUCTOVERVIEW:WIMAXTRANSMISSIONFEATURES
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The following transmission features are supported by the WiMAX Outdoor CPE to provide stable and
error-free connection.
1.2.1DYNAMICADAPTATION
Dynamic adaptation enables the CPE to maintain a high data rate while taking into account
current link conditions like half-loss, interference, and seasonal foliage changes. The CPE
monitors wireless link conditions on a burst-by-burst basis and uses dynamic adaptive
modulation control, based on the measured CINR (Carrier/(Interference + Noise) Ratio), to
regulate the link.
1.2.2ADAPTIVECODING
Each data transmission to or from the CPE contains extra, redundant information to reduce the
errors introduced during transmission. A coding rate is the ratio of meaningful data to this extra
padding (including error correction data). Adaptive coding enables the CPE to dynamically
change the coding rate depending on this ratio. This CPE supports coding rates of 1/2, 2/3, and
3/4.
1.2.3ADAPTIVEMODULATION
Adaptive Modulation is used to specify what modulation technique is coded in to carriers
composing orthogonal frequency-division multiplexing (OFDM) symbols. This CPE supports
QPSK, 16 QAM, and 64 QAM modulation techniques.
1.2.4TRAFFICCLASSIFICATION
Traffic Classification categorizes transmission bursts by searching for pattern matches within the
data. Classifications (for example, burst destination, source MAC address, and Virtual LAN tags)
are defined and managed by the base station and transmitted to the CPE.