1. Preview of simulation diagram of algorithm part

          Soft handoff yes WCDMA One of the key technologies of the system , It is also the focus of wireless resource management and optimization . The setting of soft handoff algorithm and related parameters directly affects the capacity and quality of service of the system . This paper deals with WCDMA The soft handoff technology in the system is studied , Firstly, the basic process of soft handoff algorithm is introduced , And then to the traditional UTAR The soft handoff algorithm is introduced and simulated , And use the average number of active sets （MASN）、 Activation set update rate （ASUR） And call interruption probability （OP） Three performance indexes are used to analyze the performance of the algorithm . Finally, according to the defects of the current algorithm , An improved soft handoff algorithm is proposed , Through simulation verification, we know , The average number of active sets of the improved algorithm （MASN）、 Activation set update rate （ASUR） And call interruption probability （OP） Are better than the traditional soft handoff algorithm .

    According to the algorithm proposed above , adopt MATLAB The algorithm is simulated and analyzed , Distribution pair MASN（ Average number of active set updates ）、ASUR（ Activation set update rate ）、OP（ Outage probability ） Three indicators for simulation analysis .

·MASN（ Average number of active set updates ）

chart 1 The average number of active sets of soft handoff algorithm

·ASUR（ Activation set update rate ）

chart 2 Update rate of activation set of soft handoff algorithm

·OP（ Outage probability ）

chart 3 Interrupt probability of soft handoff algorithm

  The relationship curve between boundary coverage efficiency and fading margin is shown in the figure below ：

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wcdma Soft handover performance matlab Simulation m, Compare the average number of active sets (MASN)、 Activation set update rate (ASUR) And call interruption probability (OP) Three performance indicators

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