Title :
A hybrid OFDM body coupled communication transceiver for binaural hearing aids in 65nm CMOS
Author :
Saadeh, Wala ; Kifle, Yonatan ; Masdar, Jerald Yoo
Abstract :
An interference and multipath resilient Body Channel Communication transceiver with ground effect cancellation for binaural hearing aids application is presented. The channel characteristics are measured between the intended points of transmission and reception to measure the path loss. The energy efficient transceiver is based on Hybrid OFDM folded in FSK modulated signal to mitigate the multipath problem in binaural hearing aids. By eliminating the needs for DACs, ADCs and power amplifier, the proposed design is free from peak-to-average power ratio (PAPR) problem. It utilizes 4 channels Adaptive Frequency Hopping technique for resisting interference. A variable gain LNA is exploited in this implementation to overcome the variable ground effect of BCC. The transceiver is implemented in 65nm CMOS process with an active area of 2.28mm2 for baseband OFDM and a data rate transmission of 1 Mbps while consuming 1.54mW.
Keywords :
CMOS integrated circuits; OFDM modulation; body area networks; frequency shift keying; hearing aids; interference suppression; low noise amplifiers; multipath channels; radio transceivers; radiofrequency interference; wireless channels; 65nm CMOS process; FSK modulated signal; adaptive frequency hopping technique; binaural hearing aids; bit rate 1 Mbit/s; body area network; channel characteristics measurement; data rate transmission; energy efficient transceiver; ground effect cancellation; hybrid OFDM body coupled communication transceiver; intended reception point; intended transmission point; interference body channel communication transceiver; multipath resilient body channel communication transceiver; path loss measurement; power 1.54 mW; variable gain LNA; Ear; Frequency shift keying; Hearing aids; Loss measurement; OFDM; Transceivers; Binural Hearing Aids; Body Area Network; Body Channel Communication; Frequency-Shift Keying (FSK); Orthogonal Frequency-Division Multiplexing(OFDM);
Conference_Titel :
Circuits and Systems (ISCAS), 2015 IEEE International Symposium on
Conference_Location :
Lisbon
DOI :
10.1109/ISCAS.2015.7169223
