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A Novel MICS Receiver with FSK Dual Band Demodulator

2018; Advances in Science, Technology and Engineering Systems Journal (ASTESJ); Volume: 3; Issue: 5 Linguagem: Inglês

10.25046/aj030509

2415-6698

Saif Benali, Ghazi Bouzid, Hatem Trabelsi,

Advanced Wireless Communication Techniques

A low-complexity dual-band chirp FSK, direct conversion receiver is described in this paper.The receiver is dedicated to be used in the transceiver unit of a medical implantable wireless sensor.The system uses the RF band between 402 and 405 MHz.Two sub-bands frequencies employing chirped pulses are assigned for both binary information.The novelty of this work is the use of a Binary FSK LFM modulator, a direct conversion receiver and a simple and low power non-coherent BFSK envelope detection demodulator.Receiver performances are evaluated for all the input power dynamic range.Receiver front-end parameters are optimized using harmonic balance simulation.In order to improve receiver sensitivity, a low pass filter with controllable bandwidth between 40 and 300 KHz is used to avoid in-band interference.The receiver is able to achieve a noise figure of 5.5 dB, a receiver sensitivity of -93 dBm and a maximum data rate of 100Kbps.The simulated IIP3 and P-1dB are 12.6 dBm and 22.1 dBm respectively.A simple non coherent binary dual band FSK demodulator was used which is based on an envelope detector, integrate & dump, a sampling & hold and a liming circuit.The receiver was co-simulated with the dual band non coherent demodulator.The proposed receiver has a sensitivity of -93 dBm and a BER less than 10 -3 .