Category: CDMA

CDMA means all depedancy on power control here i write on Power Control Inaccuracy in cdma. Traffic capacity of CDMA systems is increased by implementing an appropriate power control scheme…

Conventional Blocking formula and its Analysis for cdma. In AMPS and TDMA systems, voice/traffic channels are assigned to users as long as they are available. Given the required offered traffic,…

Here i write down on how Forward Channel works in CDMA ? and its Structure. The following figure shows an example of the code channels transmitted by a base station….

The Reverse CDMA Channel is composed of Access Channels and Reverse Traffic Channels. These channels share the same CDMA frequency assignment. Each Traffic Channel is identified by a distinct user…

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…

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…

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…

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…

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…

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…