A non-coherent DPSK data receiver with interference cancellation for dual-band transcutaneous telemetries

Mingcui Zhou, Mehmet Rasit Yuce, Wentai Liu

Research output: Contribution to journalArticlepeer-review

65 Citations (Scopus)

Abstract

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 subsampllng 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 × 1.7 mm2.

Original languageEnglish
Article number4625999
Pages (from-to)2003-2012
Number of pages10
JournalIEEE Journal of Solid-State Circuits
Volume43
Issue number9
DOIs
Publication statusPublished - 2008 Sept

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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