Trend of wireless communication systems and wide-band circuits

Watanabe, Osamu; Yamaji, Takafumi; Itakura, Tetsuro; Otaka, Shoji; Hattori, I.

doi:10.1002/ecjc.20146

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2009

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“…Another comparison angle is the operation in near-and far-field conditions: in general, the Zero-IF architecture allows for a higher signal gain than the Low-IF structure, making it better suited for far-field operation; however, the Low-IF receiver performs better in near field conditions than a Zero-IF one, as the higher-gain of the later can lead to saturation/compression of the signal path [7].…”

Section: Introductionmentioning

confidence: 99%

Reconfigurable Zero/Low-IF receiver

Kirei

Ţopa

2009

2009 International Symposium on Signals, Circuits and Systems

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This paper proposes an architecture for reconfigurable receivers that can operate in both Low-and Zero-IF modes. The hardware reuse is maximized by a newly proposed reconfigurable ∆ /Σ-∆modulator for data conversion. A new approach to the design of second order approximation for derivate computation in ∆ converter is also introduced. Simulation results shows the possibility to achieve data conversion at -70dB SQNR in Σ-∆ mode and -55dB in ∆ mode.

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Section: Introductionmentioning

confidence: 99%