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general GSM900 band is:
UL:890MHz - 915 MHz
DL:935Mhz - 960MHz
Soviet military once used 900 Mhz band. If the Kazahstan situation similar to the Russian, then the military should be still in control over the band. You have to work for Kazah mobile operator or be in the military to know exact band.
Hi,
i assume that the received vector you have is signal at receiver input.
The very first thing that is necessary for the receiver is synchronization - basically receiver should know the strongest path.
There should be some kind of sinchronisation info available in the telecom system -...
vlr purge
Some networks require mobile phone to report to the network when they are switched off. There are cases when mobile phone is not capable to send such message (say it was dropped on the ground and the battery flew off) or mobile entered area of no coverage.
So, if mobile has reported...
RF channel introduces distortion to the signal causing intersymbol interference. Channel estimation allows to determine that distortion. Furthermore it is possible to remove the distortion by multiplying received signal by inverse of RF channel transfer function.
Hi,
it is harder to make Power amplifiers for mobiles phones in GSM1800 than GSM900 with the same output power. So the GSM 1800 phones are less powerful.
The GSM1800 system becomes uplink limited, i.e. BTS will not be able to hear MS, while MS will be in perfect reception of BTS signal. There...
E-TCH within EDGE
Hi,
i do not know exact specs, but i would strongly recommend the following book:
Timo Halonen, Javier Romero, Juan Melero
"GSM, GPRS, and EDGE performance : evolution towards 3G/UMTS" , John Wiley & Sons, 2003
it is available as an ebook and probably could be found in...
E-TCH within EDGE
According to specifications it can be used. It could be used in conjunction with AMR, especially AMR-WB (wide band). It is a key component of next step in GSM evolution - Flexible Layer 1
hi,
considering 8QAM and 8 PSK the difference is only in amplitude of 45+n*90 constellation symbols. If the amplitudes are made the same for all points, then 8QAM becomes 8PSK. Those 45+n*90 are very challenging for Power Amplifier in TX as it requires higher linearity.
1. If your baseband...
1) Of course more samples will provide more accurate BER, but keep in mind that your channel should be changing in a (pseudo)random way. If same 2048 bits are sent over the same channel, then it is not worth to repeat, since results from each simulation would be just the same.
2) I have been...
Hi,
probably I will not be able to answer your questions completely, but I hope I will give you some hints. This is because you are describing your system in a general way, but you questions are quite particular - but please don't take it as an offence.
1. It depends how you implement your...
Hi,
1) transmission wire is usually called a feeder. Cross section area of feeder is dependant on transmission power and of course on signal amplitude.
2) antenna wire thickness is rather dependent on frequency rather than on amplitude.
hope this helps
nodeb protocol
The pleasure is mine.
First it should be stated that CDMA is not modulation but the method of multiplexing channels or data from different users. There plenty of other multiplexing or multiple access methods - tdma or ofdma just to name few.
For data transfer over RF...
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