Development of Field Propagation Model for Urban Area

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CHAPTER 3 METHODLOGY FOR FIELD DATA COLLECTION, ANALYSIS & IST SIMULATION IN MATLAB:
In this chapter, total concentration is on data collection tools and ist analysis because field data collection is one of the major requirements of current research work. A number of data collection tools are available in the market in which TEMS data collection tool has been chosen for the current research work because it provides several advantages as compared to other data collection tools.
3.1 INTRODUCTION:
The excellence of the network is eventually evaluated by the satisfaction of the subscribers of the network. The measurement procedure is based on the use of a drive test system. A drive test simply means drive and test while roaming of a wireless network in a car. The drive test system provides the insight to the performance of a network particularly in terms of RF coverage. Drive tests give evaluation of the network performance the field. The testing procedure starts with selection of the area of the network where the drive tests require to be performed. The RF engineer must check the suitable kits that comprise mobile equipment (mobile phone), drive testing software (on a laptop), and a GPS (global positioning system) unit before going to the drive test. While the drive testing starts, two mobiles are used to make calls with a delay of few seconds. The third mobile is generally used for testing the coverage area. Using this third mobile the engineer makes one continuous call. If this call breaks it will go for another call. The main use of this testing process is to collect enough samples at a reasonable speed and in a reasonable time. It consists of investigating the RF coverage by looking at the key performance indicators, such as pilot power strength (Ec/Io), the forward transmit power (Tx), the downlink receive power (Rx) and the Frame Error Rate (FER) while roaming in the wireless network. In drive test evaluation, the BSs must be identified prior