A low-power 2.45 GHz WPAN modulator/demodulator

This paper presents the architecture as well as the circuit implementation of a wireless personal area networks (WPAN) modulator/demodulator using 2.45 GHz band compliant with the physical layer standard of IEEE 802.15.4. A noncoherent demodulation scheme is employed to resolve the complexity and power dissipation problem, where a phase-shift down sampling method is adopted to detect the maximum phase accumulation which is the location of the correct data. A prototypical system on silicon with core area of 0.39 mm2 has been realized by using 0.18μm CMOS process. The packet error rate (PER) is measured to be <1%<1% given the SNR of 9 dB. The total power consumption is merely 1.37 mW (included Tx and Rx) given a 8.0 MHz system clock.