Application Research Of Software Radio In The Mobile Communication

Software Radio (SWR) can make the wireless communication system have a good flexibility and generality. Also, the interconnection and update of the system will be very convenient.In this thesis, the application of SWR in the base station based on mobile communication is studied. First, the theory and structure of SWR is expounded, then software and hardware models of the base station, which use the SDR structure of wideband and band-pass sampling in IF (Intermediate frequency), are put forward. The design of hardware module includes A/D converter, DDC (Digital Down Converter), DUC(Digital Up Converter) and DSP. The design and application of AD6640 and AD6624 are fully discussed in this part. The design of software module includes the parameter design for DDC filter and the base-band signal processing of DSP. And the realization of the DQPSK modulation and demodulation algorithm by DSP and the simulation of the burst at the transmitter are discussed. It can provide some reference worth to develop the application research of SWR.