A Low-Power Pulse-Shaped Duobinary ASK Modulator for IEEE 802.11ad Compliant 60GHz Transmitter in 65nm CMOS

Bangan LIU
Haosheng ZHANG
Dongsheng YANG
Aravind Tharayil NARAYANAN
Dae Young LEE
Sung Tae CHOI
Rui WU
Kenichi OKADA

IEICE TRANSACTIONS on Electronics   Vol.E101-C    No.2    pp.126-134
Publication Date: 2018/02/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E101.C.126
Type of Manuscript: PAPER
Category: Electronic Circuits
60-GHz,  5G communication,  spectrum mask compliant,  duobinary,  semi-digital FIR,  

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An energy efficient modulator for an ultra-low-power (ULP) 60-GHz IEEE transmitter is presented in this paper. The modulator consists of a differential duobinary coder and a semi-digital finite-impulse-response (FIR) pulse-shaping filter. By virtue of differential duobinary coding and pulse shaping, the transceiver successfully solves the adjacent-channel-power-ratio (ACPR) issue of conventional on-off-keying (OOK) transceivers. The proposed differential duobinary code adopts an over-sampling precoder, which relaxes timing requirement and reduces power consumption. The semi-digital FIR eliminates the power hungry digital multipliers and accumulators, and improves the power efficiency through optimization of filter parameters. Fabricated in a 65nm CMOS process, this modulator occupies a core area of 0.12mm2. With a throughput of 1.7Gbps/2.6Gbps, power consumption of modulator is 24.3mW/42.8mW respectively, while satisfying the IEEE 802.11ad spectrum mask.