The Design Of TC-OFDM And GPS/BD Fusion Positioning Base-band Signal Processing ASIC

With the rapid development of society and economy,location-based services(LBS,the Location-based Service)has been more and more common in people's daily life,and the demand of navigation and positioning grows fast.In the outdoor environment,the satellite positioning system such as GPS and BDS,GALILEO,GLONASS has meet people's basic requirements of the navigation and positioning.However,in the indoor environment,the current location technology,still can't fully meet the increasing demand of high accuracy indoor positioning.On this topic,this paper put forward a fusion positioning scheme of TC-OFDM(Time&Code Division-Orthogonal Frequency Division Multiplexing)and GPS/BD.This paper studies the front end design of TC-OFDM and GPS/BD fusion positioning base-band signal processing ASIC.The detailed research contents and results are as follows:(1)The signal system of TC-OFDM and GPS/BD are discussed.The pseudo code ranging principle and the architecture of base-band signal process is studied.The fusion positioning technology of TC-OFDM and GPS/BD is researched in detail.(2)Based on the TC-OFDM signal system,the design and hardware implementation of the TC-OFDM base-band signal processing algorithm is studied in detail.The specific contents mainly include the strong signal cross-correlation interference inhibition algorithm based on the RAM and a TC-OFDM and inertial integrated multipath suppression algorithm in complex indoor environment is studied.(3)The front end design of TC-OFDM and GPS/BD fusion positioning base-band signal processing ASIC is researched in detail,including the design of chip architecture,TC-OFDM base-band process module,system bus design,clock management unit,reset logic and low power consumption.(4)The system verification problems of TC-OFDM and GPS/BD fusion positioning base-band signal processing ASIC is discussed.Mainly introduced the verification base on SystemC and studied in the FPGA prototype verification of the ASIC.