By Dr. Ernest Simo
1.0 Forward Link Description
- The cdma2000 standard prescribes a set of "Forward Link channel options" depending on Radio configuration scenarios.
- To reduce intra-cell interference, each forward link physical channel is modulated by an appropriate Walsh code or quasi-orthogonal function.
- Each code channel is then spread by a quadrature pair of PN sequences at a fixed chip rate of 3.6864 Mcps for DS operation or 1.2288 Mcps for MC operation.
- Multiple Forward CDMA Channels may be used within a base station in a frequency division multiplexed manner.
- This "suite" of channel options can be customized to support a desired set of concurrent services. They Include:
- The Forward Pilot Channels
- The Common Pilot
- The Diversity Common Pilot
- The Auxiliary Pilot
- The Auxiliary Diversity Pilot
- The Dedicated Auxiliary Pilot
- The Common Pilot
- The Synchronization Channel
- The Sync Channel
- The Wideband Sync channel for higher RCs
- The Sync Channel
- The Idle State Channels
- The Quick Paging Channel
- The Broadcast Channel
- The Paging Channel
- The Common Control Channel
- The Common Assignment Channel
- The Common Power Control Channel
- The Quick Paging Channel
- The Forward Traffic Channels
- The Fundamental Channel
- The Supplemental Code Channel
- The Dedicated Control Channel; and
- The Supplemental Traffic Channel
- The Fundamental Channel
CDMA Online Tech Talk
By Dr. Ernest Simo
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© 2000 DR. ERNEST SIMO - SPACE2000