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GSM is a technology which is the leading cell phone standard all over the world. In 1982 it was recognized as a standard for digital wireless communications and was first adop…ted in Europe and then by Asia, Africa etc. The first system was online in 1991 and GSM was formerly known as Group Special Mobile but now stands for Global System for Mobile communications. USA, however has not adopted GSM as a standard and so different carriers now use different technologies as opposed to only GSM. GSM uses digital technology and the methods of time division multiple access transmission. In GSM, sound is digitally prearranged through a special encoder, which imitates the distinctiveness of human speech. This method of transmission allows a very competent statistics speed/information content ratio. GSM is an open system and is a non propriety technology. One of the great benefits of GSM is that it facilitates international roaming. As it is adopted by more than 170 countries, you have the facility of using your GSM cell phone in all these places without having to change your number. GSM satellite roaming has broadened the scope of cellular services even to areas where standard terrestrial services are not possible. GSM is a technology that is rapidly growing and constantly evolving with wireless, satellite and cordless systems offering greatly expanded services. These services include multimedia data services, high speed, inbuilt support for side by side use of these services and faultless incorporation with the Internet and wireline networks. 3GSM (next generation of mobile communications services) is already charted out and will make available services enhancing the already existing voice, data, and text services. GSM will provide video on demand and will help to lessen the gap between wireless and internet/computers. GSM works on different frequency bands across the world. In North America it uses a 1900 MHz frequency whereas in other parts of the world it uses either 900MHz or 1800 MHz. As different frequencies are used in different places, your GSM handset should support various bands so that it can be used globally. From the beginning, GSM has been developed with the need to give its customers utmost security in terms of secure communications, fraud prevention, and call privacy. Today it is the worlds most secure public wireless standard for cellular phones. In an entirely different context, GSM could also stand for grams per square metre. This is the standard measure used for paper, and fabrics.
Because GSM work in multiplex mode it transmit and receive at the same time and if you use the same frequency the receiver section will receive the same signal that is transmi…tted, that is also why the frequencies is so far apart, is to prevent second channel interference so thatswhy bothfrequencyare different.
Uplink translates also to Upload - where you send data to another destination.
An Uplink Port is a port on a connectivity device, such as a hub or switch, used to connect it to another connectivity device.
Uplink frequency is a frequency that goes from the ground to the satellite. Downlink frequency goes from the satellite to the ground.
The main reason of selecting a lower frequency for up-link channel in GSM is because of free space path loss. The more is the frequency the more is the loss. As mobile phone…s, being a battery driven device, have limitation in terms of power we should always look for lower path loss. Whereas BTS antennas can transmit the signal (in down-link channel) with a comparatively high power, which will compensate the path loss. And that is why it is chosen to have lower frequency for up-link and higher frequency for down-link in GSM standards. The same theory applies in almost all type of radio communication. NOTE: Frequency and power are independent of each other. For example you can control the transmission power of BTS antenna, which still transmits in the same frequency.
Uplinking refers to the transmission of a signal via a satellite from one terrestrial location to another location and then ultimately the signal can be distributed to the end… users. What is the role of uplinking in the entertainment sector? In broadcasting, broadcasters use uplinking to beam their programmes to their viewers across countries. Typically, they hire the services of a transponder or a transponder itself that will be used to beam the broadcaster's programmes to the receiving country. What is the Indian policy on uplinking? Till some time ago, there were restrictions on uplinking from India. In July 2000, the government liberalised uplinking and allowed Indian companies to set up their own teleports to uplink directly from India. Television channels were also allowed uplinking facilities. The foreign equity holding of such companies should not exceed 49%. The frequency of uplinking varies from user to user according to band assigned. Many upling frequency is 4mhz in c band and 10 mhz in ku band Generally uplinking and downlinking frequencies are kept different in order to minimise interference and distortion. For details mail me Sanidhya email@example.com
GSM Stands for Global System foe Mobile Communications.It uses TDMA and FDMA accessing techniques for effective utilization of frequency spectrum.
GSM 900: Uplink frequency: 890 - 915 MHz GSM 1800 : Uplink frequency: 1710 - 1785 MHz GSM 1900: Uplink frequency: 1850 - 1910 MHz
Up-link freq is higher than down-link freq in GSM You answer is wrong Correct answer is that, down-link frequency is greater than the up-link frequency in GSM. Up-link Frequen…cy = 890 MHz - 915 MHz Down-link Frequency = 935 MHz - 960 MHz
The uplink is the transmitter than sends the data up to the satellite. This can take the form of a dish or a highly directional antenna. You typically see these directio…nal antennas mounted on telescoping poles mounted on the top of TV station news vans.
Since path loss is directly propotional to frequency so the Mobile station transmits at lower frequencies in the uplink channel in order to conserve battery power. BTS downlin…k signal can however afford to experience path loss and still provide good enough transmission to the receiver(mobile station).
Uplink and downlink are frequencies Communication from earth station to satellite in uplink and communication from satellite to earth station is downlink Always upli…nk freq.>downlink freq.
this is where the chemical CG and MS come together to make GSMS, they can also can be taken away (separated) to be identified
A player can get Uplink in BO2 or Call of Duty Black Ops 2 by downloading the Vengeance downloadable content pack. This unlocks the Summit map where players can experience a w…hole new level of gameplay.
So that they can both be used at the same time (i.e. full duplex)without interference.