The Research And Implementation On Power Management Technology For Portable Software Radio Platform

With continuously enriched function and constantly improved performance of portable software radio platform, which exert increasingly requirements to the power management subsystem. High-performance, low-density, high-efficiency power management hardware and software strategies are become the research focus of power subsystem of the portable software radio platform.At present, with the highly integrated design of portable software-defined radio platform and the rapid development of semiconductor technology, there will be some new and higher challenges for the research of power management subsystem:(1) Large-scale microprocessors require a lower voltage, higher current, goodtransient response performance power supply;(2) Wide-band, high-speed, long-distance real-time wireless communication systempower consumption is growing fastly;(3) Portable platform, which demands high reliability, high density modules, is madedifficult to the efficient power management design of itself.This thesis studied the power management technology in portable software-defined radio platform, including:Firstly, according to the structure of the portable software radio platform, IBA is finally designed as platform power architecture. Based on he power requirement of high-performance processor, we impose focuses on the analysis the main circuit of point of load power supply(POL), AVP anti-transient control loop, and draw support from MATLAB to estimate the main factors that affecting the transient response of the circuit.Secondly, integrating the scenarios of the portable software radio platform and power requirements of each board. Completeing overall program of the power management hardware and software and selecting key chips for the power management subsystem. Based on the transient response requirments, AVP control mode and anti-transient POL circuit is simulated on PSpice software. it is clear that the circuit could satisfy transient response requirement that the voltage should be chang within 2%.Thirdly, power management platform, which is to achieve low power and power management subsystem circuits, are designed. Testing and analysising the platform power management system, not only POL power status, signal timing, ripple and transient response meet the design specifications, but also the embedded power management policy is in line with the expected power management effect. With management strategies, the maximum power saving percentage of the platform is up to 41.38% than non-management strategies platform, and the length of user online experience time is extend at least 1.12 hours.The thesis provides realize solution and practical verification for the power management of portable platform. It has versatility and practicality with a certain degree, and can be applied to some portable platforms or handheld terminals.