TY - GEN
T1 - Demodulation characteristics of a 20GHz-band direct RF undersampling receiver
AU - Norishima, K.
AU - Koizumi, T.
AU - Motoyoshi, Mizuki
AU - Kameda, Suguru
AU - Suematsu, N.
PY - 2017/5/17
Y1 - 2017/5/17
N2 - In this paper, we describe the configuration of a direct RF undersampling receiver and demonstrate the demodulation characteristics of QPSK signal for Ka-Band VSAT (Very small aperture terminal). Two different clock (CLK) sources are used to compare the difference of CLK jitter effect on the EVM. In the case of the received RF frequency is 19.4GHz and the CLK frequency is 808MHz (24th undersampling) with jitter of 270fs r.m.s., the measured EVM of 2.7% is achieved. By using a conventional pulse pattern generator having jitter of 670fs r.m.s., the EVM of 4.6% is obtained and it shows the degradation of demodulation characteristics by the CLK jitter.
AB - In this paper, we describe the configuration of a direct RF undersampling receiver and demonstrate the demodulation characteristics of QPSK signal for Ka-Band VSAT (Very small aperture terminal). Two different clock (CLK) sources are used to compare the difference of CLK jitter effect on the EVM. In the case of the received RF frequency is 19.4GHz and the CLK frequency is 808MHz (24th undersampling) with jitter of 270fs r.m.s., the measured EVM of 2.7% is achieved. By using a conventional pulse pattern generator having jitter of 670fs r.m.s., the EVM of 4.6% is obtained and it shows the degradation of demodulation characteristics by the CLK jitter.
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U2 - 10.1109/APMC.2016.7931302
DO - 10.1109/APMC.2016.7931302
M3 - Conference contribution
AN - SCOPUS:85021185340
T3 - Asia-Pacific Microwave Conference Proceedings, APMC
BT - 2016 Asia-Pacific Microwave Conference, APMC 2016 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2016 Asia-Pacific Microwave Conference, APMC 2016
Y2 - 5 December 2016 through 9 December 2016
ER -