A 24mW 5.5Gbps dual frequency conversion demodulator for impulse-radio with first sidelobe

This paper presents a modulation scheme of impulse radio which uses 1st sidelobe of transmitting NRZ baseband signal and implementation of dual frequency conversion demodulator. The proposed modulation technique realizes two times higher frequency efficiency than that of BPSK modulation and does not require up-converter in the transmitter. The dual frequency conversion demodulator compensates the spectrum distortion caused by frequency response of circuits and channel. The fabricated demodulator test chip in 65nm CMOS achieved clock and data recovery at 5.5Gbps with power consumption of 24mW.