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engbahaa
2011-12-15, 06:11 AM
22813
Unlike other design initiatives in the past, the LTE designs are being carried out using precalibrated
propagation models. The models have been tuned using a consistent process across
all AT&T markets. Newfield Wireless is the third party vendor that has been outsourced by AT&T
for the tuning and delivery of the propagation models. Only the Newfield Wireless-tuned and
validated 700 MHz and AWS Band propagation models are therefore to be used for all the LTEbased
designs. These models are tuned with the latest geo-data consisting of 38/39 clutter
classes. No other models are to be used. To maintain the accuracy of the models for all LTE
design work steps must be taken by the markets that the following are adhered to:
o The propagation models are properly assigned for all the transmitters in the market
o The propagation models are not to be renamed or changed in any way from what is delivered
by Newfield Wireless.
The calibrated propagation models are based on the Forsk Atoll Standard Propagation Models
(SPM). The Atoll SPM model is a derivative of the Hata formula