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Implementation of a spaceborne GPS signal processing device and its performance analysis

우주용 GPS 수신기를 위한 신호 처리부 구현과 성능 분석

  • Received : 2014.08.26
  • Accepted : 2014.11.28
  • Published : 2014.12.01

Abstract

We developed a GPS digital signal processing FPGA IP, SIGP-1001 to replace the obsolete GP2021 device, which has been used for many space-borne GPS receivers. From a series of tests, we verified that SIGP-1001 has equivalent performance to the GP2021 device under the same operating condition and concluded that SIGP-1001 can replace the GP2021 device. The reliability of a GPS receiver can be improved by using a space-grade FPGA with SIGP-1001 instead of the GP2021 device and its performance is expected to be improved by increasing the number of search channels.

우주용 GPS 수신기에 널리 사용되었으나 단종된 GP2021 소자를 대체하기 위해, GPS 디지털 신호 처리부인 SIGP-1001을 개발하였다. GP2021 소자와 동일한 운용조건에서 수행한 각종 실험을 통해 SIGP-1001의 성능이 GP2021 소자의 성능과 유사함을 확인하였고, 그 결과 SIGP-1001으로 GP2021 소자를 충분히 대체 가능한 것으로 판단하였다. FPGA IP(Field Programmable Gate Array Intellectual Property) 형태로 개발한 SIGP-1001을 우주급 FPGA에 적용하면 GP2021 소자를 사용하였을 경우에 비해 신뢰성 향상이 가능하며, 위성 추적 채널 수 추가 등의 기능 확장을 통한 성능 개선이 가능하다.

Keywords

References

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