GSM

How 26 and 51 Multiframes in GSM

GSM is very complicated when we talk about its rf side and in it very complicated to understand the structure of 26 and 51 Multiframes, here my try to make...
Article Topics :

Why 26 and 51 Multiframes in GSM, channel multiframe, frame, brust, control channel, channel multiframe, timeslot, traffic channel, sacch, multiframe, 51 multiframe, 26 multiframeBCCH, cell, gsm, gsm basic, gsm rf planning, sacch, sdcch, structure of the 26-multiframe, the tdma frame and the time slot, uplink

How PLMN Selection in GSM

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 registered PLMN...
Article Topics :

plmn, GSM PLMN, automatic mode, manual mode, plmn selection, gsm, mobile, priority, network, signal, messagegsm, gsm basic, plmn in gsm, plmn selection, plmn selection in gsm

What is Speech Coding

The coding mode is called Regular Pulse Excited-Long Term Prediction (RPE-LTP). It works as follow: 8KHZ of sampling is performed first, then divided into frames with 20ms; every frame has...
Article Topics :

voice coder, voice, coding, coder, bitsbrust, brust in gsm, CHANNEL, channel coding, frequency hopping, gsm, hopping, interference, interleaving, logical, lte, physical, speech coding, timeslot, transmission, trx

Fade Margin Calculation in GSM

As previously I write about fading effect in GSM here I write about Fade Margin Calculation in GSM. Cell area probability (CAP ) is the percentage of the cell area...
Article Topics :

fade margin, standard deviation, propagation constant, standard, propagation, margin, deviation, constant, signalfade margin calculation, fading in gsm, gsm, rho

Site Selection Criteria in GSM

Site 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 the...
Article Topics :

site selection, drive test, site, tower, antenna, urban, terrain, propagationgsm, gsm site selection, rf planning, rf site selection, rho, rsrp, rsrq

Antenna Installation and Downtilting

When we talk about antenna then we need to understand about antenna installation and specially about antenna downtilting.lets assume that antenna installed then how you can change its position. Its...
Article Topics :

downtilt, downtilting, horizon, electrical, mechanical, lobe, cell, antennas, patternantenna, cinr, electrical tilt, gsm, gsm antenna, mechanical tilt, rho, rsrp

What is Principle for Frequency Planning in GSM

The actual frequency planning of certain areas is usually conducted with such areas divided into segments geographically, i.e., first divide a complex network into small networks. However, there should be...
Article Topics :

frequency planning, frequency hopping, frequency, bts, reuse, planning, hopping, channelBCCH, bsic, frequency, frequency planing, gsm, gsm planning, gsm rf optimization

How 1x 3 or 1x1Reuse Patterns in Frequency Planing

Isolated reuse technology refers to 1*3 or 1*1 reuse with short reuse distance and severe interferences, radio frequency hopping technology has to be adopted. The aggregate of hopping frequencies needs...
Article Topics :

frequency hopping technology, frequency, carriers, hopping, cell, isolated, frequency hopping, radio frequency1x1 in gsm frequency hopping, BCCH, cinr, frequency planing, frequency planing in gsm, gsm, gsm basic

GSM Underlaid Overlaid Frequency Allocation and Configuration

Underlaid OverlaidĀ  Frequency Allocation In the Overlaid/Underlaid technology, all frequency carriers in the cell are divided into two parts, of which the TRX power of some frequency carriers is lowered,...
Article Topics :

overlaid underlaid frequency configuration, overlaid underlaid, frequency carriers, frequency, underlaid, overlaid, carriers, layer, circle, cellBCCH, frequency, gsm, gsm basic, gsm optimization, gsm planing, overlaid underlaid, underlaid overlaid frequency

Advantages of Multi layer frequency Reuse Pattern

Capacity increase when reuse density is multiplied: Supposing there are 300 cells Bandwidth: 8 MHz (40 frequency) Normal 4*3 reuse: reuse density=12 Network capacity = 40/12 * 300 = 1000...
Article Topics :

co channel reuse distance, different frequency carriers, baseband frequency hopping, reuse density, frequency, carriers, layer, density, network, interferencesBCCH, frequency planing, gsm, gsm basic, gsm optimization

Multi layer Frequency Reuse Pattern in GSM

Multi-layer reuse pattern technology means to divide the whole frequency resources into different subgroups according to specific principles. Each subgroup allocates frequency carriers to every cell by means of different...
Article Topics :

Multi layer Frequency Reuse Pattern, Frequency Reuse, frequency, interference, technology, reuse density receivesBCCH, frequency, frequency planing, gsm, gsm basic, gsm planing

4*3 Frequency Reuse in GSM

The 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 model. “4″ represents...
Article Topics :

basic frequency reuse, frequency, reuse, cells, cluster, channel, carrier, bts, principle12 cell clusters, frequency planing, gsm, gsm basic

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