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Specifications of WCDMA

Channel Bandwidth  5 MHz Duplex Mode  FDD and TDD Downlink RF Channel Structure  Direct Spread (DS) Chip Rate  3.84 Mcps Frame Length  10 ms Spreading Modulation  Balanced QPSK (downlink) Dual-channel QPSK (uplink) Complex spreading circuit Coherent detection  • User dedicated time multiplexed pilot (downlink and uplink) • common pilot in downlink Channel Multiplexing in Downlink  … Read more

How to Control Inter-System Interference in LTE

The Various steps to control inter-system interference include: 1. external Filters, add the transmitters and receivers 2. Antenna isolation between transmitters and receivers of victims 3. the distance between transmitters and receivers of victims 4. Reduce transmission power 5. Guard band between operators Step 1 is probably the most common technical solutions. This can have … Read more