Product Info

WipLL Radio Technology - Physical Layer System Description

2-24 Airspan Networks Inc. 25030311-08

2.6.2.2. Link Budget

The coverage analysis of WipLL includes the analysis of the power balance between

the transmitter and the receiver, threshold considerations, margins, reserves, and

certain statistics of the system. Therefore, the lead-in reception level is measured by

the following equation:

Rx = Tx – LossTx + AntGainTx – PathLoss + AntGainRx – LossRx

Where,

Rx =

Reception level in dBm

Tx =

Transmitter power in dBm (27 dBm in the WipLL system)

LossTx =

Transmitter losses in dB (0 dB in the WipLL system)

LossRx =

Terminal receiver losses in dB (0 dB in the WipLL system)

AntGainTx =

Transmitter antenna gain

AntGainRx =

Receiver antenna gain in dBi (decibels referenced to isotropic

radiator)

PathLoss =

Propagation loss in dB

Note: Both the base station and the subscriber site can serve as transmitter o

receiver. For downlink budget, the transmitter is the base station and the

receiver is the subscriber; and vice versa for the uplink budget.