1. ADJACENT BAND COMPATIBILITY BETWEEN GSM AND CDMA Presented By Sheikh Danish Mazhar Assistant Director (Monitoring) Frequency Allocation Board
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9. Case Study (Deployment of CDMA in 900 MHz Band) 921MHz 914.9 + 2. 15 MHz (Transition Band) 880 MHz 914.9 Figure 1: GSM and CDMA systems with frequency separation around the duplex transition frequency at 915 MHz GSM Uplink CDMA Downlink
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14. Interference Scenarios (Contd.) Downlink band 925 – 960 MHz Transition Frequency 915 MHz 1 2 3 CDMA Carriers 917.675 MHZ 920.175 MHz Uplink band 870 - 915 MHz Figure 2: Depiction of IMD3 case (a) IMD3 product 913.300 MHz
15. MCL Calculations 57.67 20 15 3 25 Free Space Propagation (dB) Distance (m) Tx. Ant. Gain (dB) Losses (dB) Tx. Power (Watts) 26.31 -16 3 15 Required Attenuation (dB) Interference Power (dBm) Feeders etc. (dBm) GSM Rx. Antenna Gain (dB)
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21. Example of Pakistan FIGURES IN MHz 880 915 895.1 895.7 905.3 889.9 900.5 885.1 880 SCO ( WLL) PAKTEL SCO (GSM ) UFONE WARID TELENOR MOBILINK 910.1 914.9 925 960 940.1 940.7 950.3 934.9 945.5 930.1 PAKTEL UFONE WARID TELENOR MOBILINK 955.1 959.9 SCO (GSM ) 835 840 SCO ( WLL) GSM 900 TELENOR TELENOR Frequency Allocation Plan For AJK & Northern Areas
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