05.16 -100.16 Reguired Eb/No Soft handover MDC gain Processing gain 24.98 24.98 17.78 17.78 17.78 17.78 14.26 14.26 10.00 10.00 Interference margin (NR) Required BTS Ec/Io [q] -17.97 -16.67 -12.77 -10.47 -12.77 -10.47 -9.75 -7.45 -5.99 -3.69 Required Signal Power [S] -123.13 -116.83 -117.93 -110.63 -117.93 -110.63 -114.91 -107.61 -111.15 -103.85 Cable loss Body loss Antenna gain RX 18.00 18.00 18.00 18.00 18.00 Soft handover gain Power control headroom Sensitivity -137.63 -111.33 -132.43 -110.13 -132.43 - -110.13 129.41 -107.11 -125.65 - 103.35 TRANSMITTING END Node B Node B Node B Node B Node B Power per connection 21.00 27.30 21.00 28.30 21.00 28.30 26.00 33.30 26.00 33.30 Maximum Power per connection 21.00 40.00 21.00 40.00 21.00 40.00 26.00 40.00 26.00 40.00 Cable loss Body loss Antenna gain TX 18.00 18.00 18.00 18.00 18.00 Peak EIRP 16.00 42.30 21.00 43.30 21.00 43.30 26.00 48.30 26.00 48.30 Maximum Isotropic path loss 153.63 166.33 153.43 165.13 153.43 165.13 155.41 162.11 151.65 158.35 Isotropic path loss to the 153.63 153.43 153.43 155.41 151.65 cell border 3G RADIO NETWORK PLANNING AND OPTIMISATION AMR selection is based on the channel quality measurements for which both the UE and BTS are involved. Once it is confirmed that the quality of a signal is bad, the number of speech codec bits is reduced, thereby increasing the number of bits that can be used for error protection and correction. The speech frames in the AMR coder are of 20 ms, SO if the sampling rate is 8000/s, 160 samples are processed. Thus, the bit rate can be changed at each of these 160 samples through in-band signalling or through DCH. This process is known as link adaptation (as seen in Chapter 6). Thus, by using AMR, speech, coverage and quality performance can be improved. 7.6 DETAILED PLANNING When the pre-planning phase is over, and the search for sites has begun, the detailed planning process begins. This includes definition of the practical aspects of a site, such as antenna locations and heights, and study of link performances an