Structure of Direct RF Sampling Receivers for GNSS Signals
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초록
A direct RF sampling method refers to a technique that directly converts a passband signal to an intermediate band or a baseband without using a mixer. This method is less complicated than an existing RF receiver because a mixer is not used. It uses digital processing after sampling, and thus can flexibly process signals in a number of bands using software. In this process, it is important to select an appropriate sampling frequency so that a number of signals can be converted to an intermediate band that is easy to process. In this study, going beyond previously studied direct RF sampling frequency selection methods, conditions that need to be additionally considered during receiver design were examined, and the structure of a direct RF sampling receiver that satisfies these conditions was suggested.
Abstract
A direct RF sampling method refers to a technique that directly converts a passband signal to an intermediate band or a baseband without using a mixer. This method is less complicated than an existing RF receiver because a mixer is not used. It uses digital processing after sampling, and thus can flexibly process signals in a number of bands using software. In this process, it is important to select an appropriate sampling frequency so that a number of signals can be converted to an intermediate band that is easy to process. In this study, going beyond previously studied direct RF sampling frequency selection methods, conditions that need to be additionally considered during receiver design were examined, and the structure of a direct RF sampling receiver that satisfies these conditions was suggested.
참고문헌 (7)
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- Barrak, R., "RF Subsampling GNSS Receiver: Potential Advantages and Feasibility Study", International Conference on Microelectronics, pp.1~6 (2011)
- Bin, H., "Reaching for the STARx: A Software-Defined All-GNSS Solution", Inside GNSS Magazine, 9, pp.50~60 (2014), GNSS Magazine
- Huang, Y., "Sampling Rate Determination for RF Integrated Front End of Multiple Satellite Navigation Systems", International conference on Wireless Communications Networking and Mobile Computing, pp.1~4 (2010)
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- R.G. Vaughan, "The theory of bandpass sampling", IEEE Transactions on Signal Processing, 39(9), pp.1973~1984 (1991), Institute of Electrical & Electronics Engineers (IEEE)[DOI]