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A reconfigurable direct RF receiver architecture

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5 Author(s)
Gerald L. Fudge ; L-3 Communications Integrated Systems, Greenville, Texas, USA ; Mark A. Chivers ; Sujit Ravindran ; Ross E. Bland
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This paper describes a bandpass sampling architecture for direct RF conversion that is reconfigurable and efficient. The receiver architecture avoids the requirement for high clock speeds and fast quantizers by using a two-stage sampling process. In the first stage, the RF signal is bandpass filtered and sampled using an impulse-like sampling device without quantizing the signal. After continuous time low-pass or bandpass filtering, the resulting analog signal is then sampled and quantized by a traditional analog-to-digital converter. This architecture also provides a high degree of reconfigurability in tuning range and bandwidth by using a tunable or selectable anti-aliasing filter before the first stage of sampling and by using a tunable sample clock in the first stage of sampling.

Published in:

2008 IEEE International Symposium on Circuits and Systems

Date of Conference:

18-21 May 2008