ctor losses can amount to between 2 to 3 db, depending on the quality of the cables and connectors used. Propagation Loss Propagation loss accounts for the largest variable in the link budget calculation. The propagation loss depends on a number of factors such as carrier frequency, UE distance from the transmitter, terrain and clutter, antenna height and tilt, among others. Path loss calculation is purely theoretical, and there are various propagation models that can be used to determine the path loss and, in turn, a cell radius for a particular site. Some of the popular propagation models are the Okumura-Hata model, free space model, irregular terrain model, Du Path loss model, and diffracting screens model. To calculate the path loss for a dense urban site using the Okumura-Hata model, the following formula is used: L=A+Blog10fc-13.82log10hb-a(hm)+[C-6.55log10hb].logd = - - where L is the Path loss in decibels, hB is the height of the antenna (eNodeB antenna) in meters, hm is the height of the UE antenna in meters, f is the carrier frequency in megahertz, d is the distance between the UE and eNodeB in kilometers, and A, B, and C are constants. CHAPTER 1 NETWORK PLANNING Table 1-1 is a sample RF link budget with various losses and gains on the transmitting and receiving sides. Table 1-1. Link Budget Parameters for the Transmitting and Receiving Entities UPLINK DOWNLINK TRANSMITTING ENTITY eNodeB Tx RF Output Power 23dBm 40dBM Body Loss Combiner Loss Feeder Loss 1.5dB Connector Loss Tx Antenna Gain 17.5dB 20dBm 54dBM RECEIVING ENTITY eNodeB Rx Sensitivity -104dBm -102dBm Rx Antenna Gain 17.5dB Diversity Gain Connector Loss Feeder Loss 1.5dB Interference Degradation Margin Body Loss Duplexer Loss Rx power -118dBm -96dBm Fade Margin Required Isotropic Power -114dBm -92dBm Maximum Permissible Path Loss 134dB 146dB With these parameters, a cell dimensioning is performed for 384 Kbps of data, assuming the Okumura-Hata propagation model in a dense urban area. The cell sizing is calculated as shown in Table 1-2. CHAPTE