Browsing by Author "Yang, Hung-Wei"

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Digital Self-Interference Cancellation for OFDM Full-Duplex Transmission in 60 GHz Band
(2018-01-01)
Jen, Chih-Wei
;
Yang, Hung-Wei
;
Chan, Hsun-Wei
;
Liu, Hung-Chih
;
Lopez, Henry
In this paper, we proposed an all-digital selfinterference cancellation (DSIC) with correction vector for convolution (CVC) technique to eliminate serious multipath self-interference for orthogonal frequency-division multiplexing (OFDM) full-duplex transmission in 60 GHz band. The CVC can solve the non-equivalence of circular and linear convolution. This work based on IEEE 802.15.3c/IEEE 802.11ad specification is synthesized with 40 nm 1P9M general purposes process. Under the Access Point (AP) and the User Equipment (UE) horn antennas being aligned face to face, the 9-bit fixed-point simulation result shows the proposed technique can achieve the target of the uncoded bit-error-rate (BER) of 10-2 at signal-to-noise ratio (SNR) of 24.8 dB satisfying the requirement of 26 dB.
Interference Measurement and Analysis of Full-Duplex Wireless System in 60 GHz Band
(2016)
Yang, Hung-Wei
;
He, Yongyu
;
Jen, Chih-Wei
;
Liu, Chun-Yi
;
Jou, Shyh-Jye
With co-time co-frequency full duplex (CCFD) in 60 GHz band, self interference (SI) has different characteristics due to larger wireless path loss and beamformed system compared to current band under 6 GHz (normal band). In this paper, we present real SI channel measurement results and analysis to consider indoor CCFD in 60 GHz band. The results show that the narrow beam antennas can effectively suppress the direct leakage component but increase the root mean square (HMS) delay spread of the SI channel due to reflections from nearby objects. The effect of phase noise on SI cancellation is demonstrated since a high-frequency oscillator is used. At the end, we show the key factors of SI cancellation based on the measurement results for implementation of CCFD in 60 GHz band.