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i think 8-psk modulation is also used..... for edge hardware.
Well the reason GMSK is used for GSM.1. High spectral Efficiency2. Since Basic MSK uses Phase variations for modulation so better immune to noise.3.Use of non-linear amplifiers at receivers can be utilized since the information is stored in phase variations rather than amplitude, Non-linear amplifiers give better response and consume less power so low battery usage which is a important parameter in Cellular technology.
What else can I help you with?
What Type of modulation used in GSM?
The modulation used in GSM is Guassian minimum-shift keying (GMSK), a kind of continuous-phase frequency shift keying. In GMSK, the signal to be modulated onto the carrier is first smoothed with a Guassian low-pass filter prior to being fed to a frequency modulator, which greatly reduces the interference to neighboring channels (adjacent channel interference). Added By:Muhammad Kamran Atif Contact: kami_cch@hotmail.com
Gsm 900 vs gsm 1800?
GSM-900 and GSM-1800 are used in most parts of the world: Europe, Middle East, Africa, Australia and most of Asia. In South and Central America the following countries use the following: : :* Costa Rica - GSM-1800 :* Brazil - GSM-850, 900 and 1800 :* Guatemala - GSM-850, GSM-900 and 1900 :* El Salvador - GSM-850, GSM-900 and 1900 GSM-900 uses 890-915 MHz to send information from the mobile station to the base station (uplink) and 935-960 MHz for the other direction (downlink), providing 124 RF channels (channel numbers 1 to 124) spaced at 200 kHz. Duplex spacing of 45 MHz is used. Guard bands 100 kHz wide are placed at either end of the range of frequencies[1]. : In some countries the GSM-900 band has been extended to cover a larger frequency range. This 'extended GSM', E-GSM, uses 880-915 MHz (uplink) and 925-960 MHz (downlink), adding 50 channels (channel numbers 975 to 1023 and 0) to the original GSM-900 band. The GSM specifications also describe 'railways GSM', GSM-R, which uses 876-915 MHz (uplink) and 921-960 MHz (downlink). Channel numbers 955 to 1023. GSM-R provides additional channels and specialized services for use by railway personnel. : All these variants are included in the GSM-900 specification. GSM-1800 uses 1710-1785 MHz to send information from the mobile station to the base tranceiver station (uplink) and 1805-1880 MHz for the other direction (downlink), providing 374 channels (channel numbers 512 to 885). Duplex spacing is 95 MHz. : GSM-1800 is also called DCS (Digital Cellular Service) in the United Kingdom, while being called PCS in Hong Kong[2] (not to mix up with GSM-1900 which is commonly called PCS in the rest of the world.)
How do you calculate gsm of polyethylene?
To calculate the GSM (grams per square meter) of polyethylene, you need to know the weight in grams of a known area of the material. Measure a specific area of the polyethylene sample, weigh it in grams, and then divide the weight by the area measured to determine the GSM. The formula for calculating GSM is GSM = (Weight in grams / Area in square meters).
How many GSM in 1 micron?
GSM (grams per square meter) is a unit of measurement used for the weight of paper or fabric. A micron (µm) is a unit of length equal to one millionth of a meter. To convert GSM to microns, you would need to know the density of the material in question. The relationship between GSM and microns is not a direct conversion and would depend on the specific material being measured.
How secure is the GSM cell phone network?
The telephone company GSM provide a range of phone network services. The use of a SIM card in GSM allows users to maintain a high-level of security, particularly of personal data.
Which modulation technique is used in gsm?
GSM uses GMSK modulation scheme. GPRS also uses GMSK modulation scheme. EDGE and UMTS uses 8-PSK.
What Type of modulation used in GSM?
The modulation used in GSM is Guassian minimum-shift keying (GMSK), a kind of continuous-phase frequency shift keying. In GMSK, the signal to be modulated onto the carrier is first smoothed with a Guassian low-pass filter prior to being fed to a frequency modulator, which greatly reduces the interference to neighboring channels (adjacent channel interference). Added By:Muhammad Kamran Atif Contact: kami_cch@hotmail.com
What Spectral efficiency means related to GMSK in GSM?
0.17 bit/s per Hertz per sector
What are the Uses of modulation techniques in telecommunication?
In GSM generally GMSK which is a derivative of MSK is beeing used because of its spectral efficiency and more noise resistant. Regards Sumeer Mehaboob
What is gfsk modulation?
whatbis GMSK MODULATION ?
A new communication protocol used with GSM and TDMA?
A new communication protocol that can be used with GSM and TDMA is EDGE. EDGE stands for Enhanced Data GSM Environment.
What type of antenna is used in gsm and CDMA?
http://www.ehow.com/list_7279317_types-gsm-antennas.html
What constraint length is used in GSM system?
constraint length for GSM is L=5
What is the gsm of paper used for making paper plates and cups?
170 to 230 gsm paper used for paper plates and cups
What is frequency used by GSM antenna?
1.25MHz
What gsm of paper to be used for a 3ply box having a bursting strength of 250?
u can use 250 GSM paper or 253 GSM for 3 ply box.
What is a GPS GSM?
This is a GPS that is used from a communication device, such as a cell phone. GSM stands for Global System for Mobile Communications, so GPS GSM is GPS in combination with one of these devices.
