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A Low-Power Correlation Detector For Binary FSK Direct-Conversion Receivers

Summary: A Low-Power Correlation Detector For Binary FSK
Direct-Conversion Receivers
J. Min, H-C. Liu, A. Rofougaran, S. Khorram, H. Samueli and A. A. Abidi
Integrated Circuits and Systems Laboratory
Electrical Engineering Department
University of California
Los Angeles, California 90095-1594, USA
Indexing terms: FSK detector, Tone detection, Correlation, Direct-conversion wireless receivers
A multiplierless binary FSK detector with 82 dB of dynamic range is presented. The proposed detector is
well-suited for low-power direct-conversion receivers used in wireless communications systems employ-
ing FSK modulation.
Frequency-shift keying (FSK), often in continuous-phase format, is widely used in wireless com-
munications systems such as pagers and frequency-hopped transceivers [1]. The modulated waveform has
constant envelope and narrow power spectra. At the receiver, noncoherent detection is often employed to
reduce the hardware complexity. Direct-conversion receivers also have been gaining much attention
recently for portable communications applications where low power is a key requirement. A direct-conver-
sion architecture receiver translates the received signal from RF directly to I-Q baseband signals for
quadrature detection. This eliminates image-reject filters and other IF components, and thus enables a


Source: Arslan, Hüseyin - Department of Electrical Engineering, University of South Florida


Collections: Engineering