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A Complex Bandpass Sampling Method for Downconversion of Multiple Bandpass Signals  

Bae, Jung-Hwa (고려대학교 전자컴퓨터공학과 무선통신시스템연구실)
Ha, Won (LG전자 정보통신사업본부)
Park, Jin-Woo (고려대학교 전자컴퓨터공학과 무선통신시스템연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.30, no.9C, 2005 , pp. 913-921 More about this Journal
Abstract
A complex bandpass sampling technique can provide a more flexible architecture for designing a software- defined radio(SDR) system, because it has several advantageous features of larger sampling range and lower minimum sampling frequency than a real bandpass sampling method. In spite of the potential advantages of the complex bandpass sampling, solid investigation for the direct downconversion of multiple signals by the complex sampling theory has not been reported yet. Thus, we propose in this paper a novel scheme for the downconversion of multiple signals using the complex bandpass sampling, and develop the formulae related to the complex bandpass sampling for practical usage, such as the valid sampling range, the intermediate frequency (If), and the minimum sampling frequency of the downconversion of multiple RE signals. Such derived formulae are verified from simulations.
Keywords
complex sampling; bandpass sampling; direct downconversion; software-defined radio;
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