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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.13/38947

Title
A non-coherent DPSK data receiver with interference cancellation for dual-band transcutaneous telemetries
Author/Creator
Zhou, Mingchui;  Yuce, Mehmet Rasit;  Liu, Wentai
Institution
The University of Newcastle. Faculty of Engineering & Built Environment, School of Electrical Engineering and Computer Science
Description
A dual-band telemetry, which has different carrier frequencies for power and data signals, is used to maximize both power transfer efficiency and data rate for transcutaneous implants. However, in such a system, the power signal interferes with the data transmission due to the multiple magnetic couplings paths within the inductive coils. Since the power level of the transmitted power signal is significantly larger than that of the data signal, it usually requires a high-order filter to suppress the interference. This paper presents a non-coherent DPSK receiver without a high-order filter that is robust to the interference caused by the power carrier signal. The proposed scheme uses differential demodulation in the analog domain to cancel the interference signal for a dual-band configuration. The data demodulation also uses subsampling to avoid carrier synchronization circuits such as PLLs. The experimental results show that the demodulator can recover 1 and 2 Mb/s data rates at a 20 MHz carrier frequency, and it is able to cancel an interference signal that is 12 dB larger than the data signal without using complex filters. The demodulator is fabricated in a 0.35 μm CMOS process, with a power consumption of 6.2 mW and an active die area of 2.6 X 1.7mm².
Relation
IEEE Journal of Solid-State Circuits Vol. 43, Issue 9, p. 2003-2012
Publisher Link
http://dx.doi.org/10.1109/JSSC.2008.2001881
Date
2008
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Keyword(s)
bandpass sampling;  data telemetry;  differential phase shift keying (DPSK);  dual-band;  inductive coupling;  interference cancellation;  neural implants;  non-coherent;  subsampling;  transcutaneous
Resource Type
journal article
Identifier
http://hdl.handle.net/1959.13/38947
Identifier
ISSN:0018-9200
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Reviewed
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"IEEE Journal of Solid-State Circuits"
 
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