Answer Posted / yuvaraj

GSM/CDMA
1. CELL and Sector with multiple frequency / CDMA single
frequency as carrier {users are get identifies by codes}
2. used TDMA and FDMA for Accesing /CDMA uses CDMA method
3. GSM is intial 2G technology with intial voice rate of
9.6kbps/same with 14.4kbps
4.GSM emerges into WCDMA/cdma emerges into cdma 2000
5. power control in acces method is comparitively not
efficient (when compare to CDMA)/ cdma as PLL(phase locked
loops for power transmission) better
6.call hand off and network hand off is not smoother in
GSM/ CDMA follows soft handoff and handling call hence more
efficient
7. GSM use less bandwidth and more power comparitively /
CDMA uses less bandwidth and more power

8.cost wise for opeartor GSM is less costlier , but
efficiency wise CDMA is better

Do you know what is the importance of cdma in today's cellular world?

499

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What is tdd and what are the frequencies it uses?

444

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Explain access channels?

457

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What is scrambling code?

461

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Differentiate between cdma and tdma?

439

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What is rake receiver?

473

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What is frequency hopping?

497

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Explain how can cdma work?

447

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How many channels are there in cdma reverse channels?

436

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How many channels are there in cdma forward channels?

446

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What is spread spectrum technique?

481

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Explain edge?

460

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Explain reverse traffic channels?

459

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What is forward link power control?

473

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What is soft handover/handoff?

476

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