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View Full Version : Network Planning Aspects of EGPRS



ninoy_122184
2011-12-09, 08:21 PM
1. Scope.................................................................................................................................. 4
2. Rf Requirements................................................................................................................. 5
2.1.... Some basics................................................................................................................ 5
2.2.... Interference mechanism.............................................................................................. 6
2.2.1.... Transmitter noise/ spurious emissions............................................................... 6
1.1.2.... Receiver blocking......................................................................................... 10
1.1.3.... Intermodulation............................................................................................. 14
1.3.... Summary on the required decoupling...................................................................... 20
1.4.... Adjacent Channel Interference in case of UMTS-UMTS co-location........................... 20
1.4.1.... Capacity Loss due to adjacent operators’ co-existence.............................. 21
1.4.2.... Dead Zones................................................................................................... 22
3. Antenna system solutions............................................................................................. 23
3.1.... Dual-band sites......................................................................................................... 23
3.1.1.... GSM 1800 with UMTS...................................................................................... 23
1.1.2.... GSM 900 with UMTS........................................................................................ 30
1.2.... Triple-band sites......................................................................................................... 32
1.2.1.... With dual-band antennas............................................................................. 33
1.2.2.... With triple-band antennas............................................................................. 33
1.3.... Multi-operator sites UMTS-UMTS.................................................................................. 34
1.3.1.... Separate Systems with Air Decoupling.......................................................... 34
1.3.2.... Two operators sharing one antenna (feeder sharing)................................... 35
1.3.3.... Two operators sharing one antenna panel (no feeder sharing)................... 35
4. Antenna feeder sharing................................................................................................ 37
4.1.... Dual-band sites......................................................................................................... 37
4.1.1.... Technical realization..................................................................................... 37
4.2.... Triple-band sites......................................................................................................... 39
4.2.1.... Technical realization..................................................................................... 39
4.3.... Additional losses....................................................................................................... 41
4.4.... When to use feeder sharing, and when not ?........................................................... 42
5. Considerations of tower mounted amplifiers........................................................... 43
5.1.... Feeder Sharing Solutions with TMA............................................................................ 44
5.2.... Solutions without feeder sharing............................................................................... 44
6. Antenna design methodology.................................................................................... 45
6.1.... Design process.......................................................................................................... 45
6.2.... Process on the selection of the most appropriate solution........................................ 46
Enclosure 1: Antenna Co-siting Questionnaire.............................................................. 47
1....... Explanation............................................................................................................... 47
2....... Existing equipment.................................................................................................... 47
3....... Existing antenna and feeder system.......................................................................... 48

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