CDMA

Get Here about CDMA technology and How CDMA Works, CDMA Solution and CDMA RF Optimization.


CDMA Protocol Stacks

The original release of the EIA/TIA-95-B standard defined the protocol messages and formats to be used in the CDMA system. This release is know as Revision 0 of the IS-95

CDMA Turn On Process

System Access:  When the mobile first turns on, it must find the best base station.  This is similar to analog where the phone scans all the control channels and selects

CDMA Soft Handoff Completion

If it is available, the second cell site returns the Walsh Code that will be assigned for the soft handoff. At this point, the original base station orders the soft

What is inside SYNC Channel Message in CDMA

The sync channel messages include the CDMA protocol revision supported by the cell site, the minimum protocol revision supported by a CDMA mobile in order to work with the cell

CDMA Soft Handoff Initiation

Once a call is established, the mobile is constantly searching for other possible cell sites that might be good candidate for soft handoffs. Most of the search time is limited

CDMA Call Completion

After each access attempt, the mobile listens to the Paging Channel for a response from the base station. If the base station detects the access probe from the mobile, it

How CDMA Call Initiation

The user then decides to make a call.  The number is keyed in and the send key is hit.  This initiates an Access Probe.  The mobile uses a special code

What is Polarization Mode for antenna

The polarization is a radiation feature for indicating the vector special direction of field strength of electromagnetic wave. If unspecified, the spatial direction of electric field vector usually serves as

CDMA Handoff Defination,Types and Capacity

Handoffs The TIA/EIA Interim Standard, Mobile Station – Base Station Compatibility Standard of Dual- Mode Wideband Spread Spectrum Cellular System (TIA/EIA/IS-95), states that a CDMA base station shall support three