PRACH Baseband Signal Generation Based on MSC8156AMC Platform
Xiaotao Shao · Modern Electronics Technique · 2011
MSC8156AMC which has a strong signal processing ability is an ideal platform for LTE system.PRACH(physical random access channel) is used in LTE system for physical random access.Its baseband signal generation contains the process of DFT and long sequence IFFT,and has high time complexity.In order to meet the real-time requirements,a scheme of signal processing with low computation should be chosen.According to the characteristics of PRACH preamble sequence,DFT can be implemented by the method of looking up table after appropriate deformation,which can avoid much complex multiplication operation.The long sequence IFFT operation can be resolved into some short sequences IFFT by Cooley-Turkey algorithm.In this way,the computation can be reduced much more.Above mentation signal processing scheme can meet the real-time requirement of systems.