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What excatly is spectrum? Is it just a range of frequencies? What are the frequency ranges used by 2G, 3G & 4G? What is the difference between GSM & CDMA?
What excatly is spectrum? Is it just a range of frequencies? What are the frequency ranges used by 2G, 3G & 4G? What is the difference between GSM & CDMA?
vaise i wud b more comfortble to answer Electrical core concepts still let me try
Spectrum- its a range of frequencies yes like u hv broadband connection for internet wherein each pc is alloted an I.P for data transfer similarly for mobile communication/telecom in general frequencies are alloted to subscribers/satellites etc
1G here in our childhood only few used to hv phones we called it cordless etc 1g involves only analog voice data transfer, no internet, no sms etc, its frequency range is near 800mhz m nt sure recheck here data transfer used frequency division multiplexing technique where no. of people using a mobile tower were limited
then came 2G it is a step further, it used time division multiplexing here now more no. of ppl can use that tower acc to their time slots here we have two technologies GSM and CDMA Gsm came early its TDM bt call drops and coverage area was an issue so came CDMA i.e code division multiplexing now u need not wait for ur turn, just imagine at the same time many ppl can use that tower bt their languages r different like one is speaking english/french/russian etc ie code is different plus 2g had internet access, msgs , video which 1g din have, its spectrum is also larger
3G it is also a variant of code multiplexing techniques bt with extended frequency band and speed, it has enhanced encryption also
4G- i dn knw
so overall in sab me new technologies r incorporated for faster data transfer, more data transfer and better coverage and encryption, in sab ka architecture etc bhi different hai 4G pe koi aur prakash dale plz
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Comments
What are the frequency ranges used by 2G, 3G & 4G?
What is the difference between GSM & CDMA?
Spectrum- its a range of frequencies yes like u hv broadband connection for internet wherein each pc is alloted an I.P for data transfer similarly for mobile communication/telecom in general frequencies are alloted to subscribers/satellites etc
1g involves only analog voice data transfer, no internet, no sms etc, its frequency range is near 800mhz m nt sure recheck
here data transfer used frequency division multiplexing technique where no. of people using a mobile tower were limited
then came 2G it is a step further, it used time division multiplexing
here now more no. of ppl can use that tower acc to their time slots
here we have two technologies GSM and CDMA
Gsm came early its TDM bt call drops and coverage area was an issue so came CDMA i.e code division multiplexing now u need not wait for ur turn, just imagine at the same time many ppl can use that tower bt their languages r different like one is speaking english/french/russian etc ie code is different
plus 2g had internet access, msgs , video which 1g din have, its spectrum is also larger
3G it is also a variant of code multiplexing techniques bt with extended frequency band and speed, it has enhanced encryption also
4G- i dn knw
so overall in sab me new technologies r incorporated for faster data transfer, more data transfer and better coverage and encryption, in sab ka architecture etc bhi different hai
4G pe koi aur prakash dale plz