다중비트처리기법을 이용한 소프트웨어 GPS 수신기

Abstract

The software GPS receivers based on the SDR (Software Defined Radio) technology provide the ability to easily adapt to the other signal processing algorithms without changing or modifying the hardware of the GPS receiver. However, it is difficult to implement the software GPS receivers using a commercial processor because of the heavy computational burden for processing the GPS signals in real-time. This paper proposes an efficient GPS signal processing scheme to reduce the computational burden for processing the GPS signals in the software GPS receiver, which uses a look-up table method with multi-bit processing scheme to generate correlation values between GPS signals and replica signals. This paper evaluated the performance of the proposed software GPS receiver using a sampled IF data from the digitized signal acquisition equipment. The software GPS receiver shows a satisfactory navigation performance.