A Comparative Investigation on WCDMA Power Control Mechanisms
Muhammad Ahmed Sikander, Rashid Hussain, Adnan Ahmed Siddiqui, Sheeraz Arif, Syed Wasif Ali · 2011
The main purpose of this research is to highlight the problems and advantages of both the power control mechanism and compare them accordingly. It has been investigated that open loop system is faster as compared to the close loop system as it has no long procedure or computations. It just have to compare the powers of MS (mobile station) and BS (base station) and increase / decrease the power. The present research mainly focuses on the comparison of WCDMA power control methods including, open and close loop methods, it further focus on channel transmission and signal-to-interference ratio (SIR). The channels used in controlling of power of WCDMA mobile networks are also investigated. Open loop power control has the limitations as it uses the same properties for both the directions of transmission as this is not the case every time practically or on the field. On the other hand close loop power control mechanism has a delay of 1/1.5 kHz (667 microseconds) but it is reliable because its power adjustment involves quality check and has a feedback path. It will be observed that close loop method is more reliable than the open loop method. Such an investigation will help an enhanced understanding of WCDMA technology and power control methods.