User's Manual

Total Ave EIRP (in dBm) = Ave EIRP per Ant + 10log(Number of Antennas)
For a 6-ant base station, the example above yields Total Ave EIRP = 46dBm + 7.78dB =
53.78dBm.
Note that most regulations refer to Peak power, which in a WiMAX system is normally as much
as 10dB higher than average power. In the case of the PureWave Quantum products the peak
power can be assumed to be around 9dB higher than average. Therefore, peak EIRP may be
computed as follows:
Peak EIRP per Ant (in dBm) = Ave EIRP per Ant + 9dB.
Total Peak EIRP (in dBm) = Total Ave EIRP + 9dB.
For the above example, Peak EIRP per Ant = 46dBm + 9dB = 54dBm and Total Peak EIRP =
53.78dBm + 9dB = 62.78dBm.
These equations are summarized in Table 6.
EIRP Metric Formula
Ave EIRP per Ant (in dBm)
= Ave Tx Pwr per Ant + Ant Gain – Cable and
Connector Loss
Total Ave EIRP per ant (in
dBm)
= Ave EIRP per Ant + 10log(Number of Antennas)
Peak EIRP per ant (in dBm) = Ave EIRP per Ant + 9dB
Total Peak EIRP (in dBm) = Total Ave EIRP + 9dB
Table 6: EIRP Calculations
Note that some regulations are specified for particular channel bandwidths and/or antenna
beamwidths and in such cases the allowable power should be scaled accordingly. As with the
previous calculations, each case is often unique. Again, the PureView NMS provides guidance
when deployed in markets where such regional regulations apply.
2.3.2.3 Smart Antenna Capabilities
Beamforming is a technique that combines and focuses signals to and from multiple antennas
to improve both downlink and uplink performance.
On the uplink, the base station combines signals received on its multiple antennas, resulting in
substantial link budget gains that improve range and throughput. MRC is the basic technique