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The BreezeACCESS LB Advantage
The Alvarion BreezeACCESS LB system includes several key features to
mitigate the effects of interference arising from other systems operating
co-channel in the vicinity, as well as coping with propagation anomalies
such as multipath. These features include:
Adaptive Modulation
The BreezeACCESS LB NI-01 Indoor unit automatically selects a
modulation scheme in both up and downstream directions to maximize
spectral efficiency based on the measured signal to noise and distortion
(SINADR) level. The modulation schemes supported are:
Binary Phase Shift Keying (BPSK)
Quadrature Phase Shift Keying (QPSK)
16 Quadrature Amplitude Modulation (QAM)
64 Quadrature Amplitude Modulation (QAM)
Refer to the
summary of data rates for each modulation scheme.
Advanced Error Correction
In addition to conventional forward error correction techniques, the
BreezeACCESS LB NI-01 Indoor unit uses an Automatic Repeat Request
(ARQ) scheme to dramatically reduce errors from interference and
multipath
Orthogonal Frequency Division Multiplex
(OFDM) Processing
The Alvarion OFDM technique offers tremendous robustness in the
presence of harsh multipath interference.
Narrow Beam Width
Narrow antenna beams reduce considerably the probability of
interference entering the system.
Modulation Scheme vs. Data Rate
The BreezeACCESS LB Advantage
table on page 5-8 for a
5-5
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Table of Contents
Troubleshooting
