Analyzing the signal-to-noise ratio of direct sampling receivers

The increasing demand for multi-mode multi-band operation in mobile communications requires flexible radio frontends. Direct sampling receivers are very promising for this purpose. For this class of receivers, a proper parameterization of the analog-to-digital converter, in terms of input bandwidth,...

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Bibliographic Details
Published in2013 IEEE International Conference on Communications (ICC) pp. 4561 - 4565
Main Authors Almeroth, Bjoern, Krone, Stefan, Fettweis, Gerhard
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.06.2013
Subjects
Bandwidth
Cutoff frequency
Quantization (signal)
Receivers
Signal resolution
Signal to noise ratio
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Summary:The increasing demand for multi-mode multi-band operation in mobile communications requires flexible radio frontends. Direct sampling receivers are very promising for this purpose. For this class of receivers, a proper parameterization of the analog-to-digital converter, in terms of input bandwidth, sampling frequency, and quantization resolution, is essential for its operation. This paper evaluates prospects and challenges of direct sampling receivers analytically. The impact of the sampling frequency and the quantization resolution on the signal-to-noise ratio of the received bandpass signal is approximated with a closed-form analytical expression. This is used to compare the performance of direct sampling receivers to the performance of traditional homodyne receiver concepts. Furthermore, an optimal choice and the trade-off between sampling rate and quantization resolution are discussed for direct sampling receivers that are intended for the reception of LTE signals.
ISSN:1550-3607
1938-1883
DOI:10.1109/ICC.2013.6655288