When the mobile is switched on it will select the registered PLMN in the mobile if there exist one. If there is no registered GSM PLMN or the register
Read MoreThe coding mode is called Regular Pulse Excited-Long Term Prediction (RPE-LTP). It works as follow: 8KHZ of sampling is performed first, then di
Read MoreAs previously I write about fading effect in GSM here I write about Fade Margin Calculation in GSM. Cell area probability (CAP ) is the percentage
Read MoreSite selection is based on a number of criteria. It may not be possible to satisfy all these criteria at the same time, but it is important to select
Read MoreWhen we talk about antenna then we need to understand about antenna installation and specially about antenna downtilting.lets assume that antenna inst
Read MoreThe actual frequency planning of certain areas is usually conducted with such areas divided into segments geographically, i.e., first divide a complex
Read MoreIsolated reuse technology refers to 1*3 or 1*1 reuse with short reuse distance and severe interferences, radio frequency hopping technology has to be
Read MoreUnderlaid OverlaidĀ Frequency Allocation In the Overlaid/Underlaid technology, all frequency carriers in the cell are divided into two parts, of whic
Read MoreCapacity increase when reuse density is multiplied: Supposing there are 300 cells Bandwidth: 8 MHz (40 frequency) Normal 4*3 reuse: reuse den
Read MoreMulti-layer reuse pattern technology means to divide the whole frequency resources into different subgroups according to specific principles. Each sub
Read MoreThe basic frequency reuse mode of GSM is 4*3 frequency reuse. It is the basic of other frequency reuse modes, we also call it regular frequency reuse
Read MoreGSM is an interference restricted system. Carrier-to-interference ratio (C/I), also called interference protection ratio, refers to the ratio of all u
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