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- A. Abbasi and H. Liu, "OneAI - Novel multipurpose deep learning algorithms for UWB wireless networks," in Proc. SiPS 2021.
- S. A. Aly, A. Abbasi, and H. Liu, "A novel hybrid AoA and TDoA solution for transmitter positioning," in Proc. IEEE IPIN'21, Nov. 2021.
- Y. Zou and H. Liu, "Semidefinite programming methods for alleviating clock synchronization bias and sensor position errors in TDOA localization," in Proc. IEEE ICASSP, June 2021.
- G. Wang, A. Abbasi, and H. Liu, "WiFi-based environment adaptive positioning with transferable fingerprint features," in Proc. IEEE Computer and Communication Workshop and Conference, Jan. 2021.
- G. Wang, A. Abbasi, and H. Liu, "Dynamic phase calibration method for CSI-based indoor positioning," in Proc. IEEE Computer and Communication Workshop and Conference, Jan. 2021.
- A. Abbasi and H. Liu, "Novel CNN and hybrid CNN-LSTM algorithms for UWB SNR estimation," in Proc. IEEE Computer and Communication Workshop and Conference, Jan. 2021.
- A. Abbasi and H. Liu, "Novel cascade CNN algorithm for UWB signal denoising, compressing, and ToA estimation," in Proc. IEEE Computer and Communication Workshop and Conference, Jan. 2021.
- S. Kaviani, I. Sohn, and H. Liu, "Application of complex systems in neural networks against Backdoor attacks," in Proc. 11th Int. Conf. ICT Convergence, Jeju Island, Korea, Oct. 2020.
- H. Liu, H. Kim, S. Moon, and I. Hwang, "Deep learning for channel estimation and tracking in vehicular to infrastructure communications," in Proc. 11th Int. Conf. ICT Convergence, Jeju Island, Korea, Oct. 2020.
- H. Liu, S. Moon, H. Kim, and I. Hwang, "DNN-based beam and blockage prediction in 3GPP InH scenario," in Proc. 11th Int. Conf. ICT Convergence, Jeju Island, Korea, Oct. 2020.
- A. Aljerme and H. Liu, "Time-varying Kalman modeling of measured RSSI in multipath wireless channels," in Proc. Int. Conf. on Computing, and Communications, San Francisco, June 2020.
- F. Alhussein and H. Liu "Variable vs. fixed window width CCRW receivers for multipath mitigation in GNSS with BOC and MBOC signals," in Proc. Int. Conf. on Computing, and Communications, San Francisco, June 2020.
- Y. Zou and H. Liu, "A simple and efficient iterative method for TOA localization," in Proc. IEEE ICASSP'20, Barcelona, Spain, May 2020.
- A. Aljerme and H. Liu, "A time-varying neural-network-based ARX model of the traffic in mobile networks," in Proc. of the 10th IEEE Annual Computing and Communication Workshop and Conference (CCWC), Las Vegas, Jan. 2020.
- F. Alhussein and H. Liu, "A CCRW receiver with a single window of variable width for mitigation of multipath and ambiguity in GNSS with MBOC signals," in Proc. of the 10th IEEE Annual Computing and Communication Workshop and Conference (CCWC), Las Vegas, Jan. 2020.
- J. M. Williams, F. Gao, Y. Qian, C. Song, R. Khanna, and H. Liu, "Proof-of-concept for an IoT sensor platform with 2.4GHz wake-up radio," in Proc. IEEE RWW, ouston, TX, Jan. 2020.
- J. M. Williams, R. Khanna, Y. Qian, and H. Liu, "Proof-of-concept for an IoT sensor platform with 2.4GHz wake-up radio," in Proc. IEEE RWW, ouston, TX, Jan. 2020.
- J.M. Williams, R. Khanna, L. Rumbel, Y. Qian, and H. Liu, "Target localization using approximate maximum likelihood for MIMO radar system," in Proc. 2019 IEEE Global Humanitarian Technology Conference (GHTC), Seattle, WA, Oct. 2019.
- A. Fawaz M, Almalki, Y. Zou, and H. Liu, "Solar and RF energy harvesting design model for sustainable wireless sensor tags," in Proc. IEEE Vehicular Technology (VTC19-Fall), Honolulu, Haiwaii, Sep. 2019.
- F. Alhussein and H. Liu, "An efficient method for multipath mitigation applicable to BOC signals in GNSS," in Proc. Int. Conf. Wireless Commun. Mobile Comput., Tangier, Morocco, Jun. 2019.
- A. Aljerme and H. Liu, "Efficient Kalman modeling of multipath wireless channel for secret key generation," in Proc. Int. Conf. Wireless Commun. Mobile Comput., Tangier, Morocco, Jun. 2019.
- K. Zhan,Y. Liu,T. Kamgaing, R. Khanna, G. Dogiamis, H. Liu, and A. Natarajan, " A low-power FSK/spatial modulation receiver for short-range mm-wave wireless links," in Proc. IEEE 2019 Int. Microwave Symp. (IMS 2019), June 2-7, 2019, Boston, Massachusetts.
- T. Cheng, Y. Song, T. Li, F. Li, and H. Liu, " Wide-range dimmable clipped flip-OFDM for indoor visible light communications," in Proc. IEEE APCC 2018, Nov. 2018, Ningbo, China (invited).
- L. Wu, L. Kong, Z. Zhang, J. Dang, and H. Liu, " Wide-range dimmable clipped flip-OFDM for indoor visible light communications," in Proc. IEEE/CIC Int. Conf. Commun. in China (ICCC), Aug. 2018, Beijing, China.
- Y. Zou, H. Liu, Q. Wan, " Semidefinite programming for TDOA localization with locally synchronized anchor nodes," in Proc. IEEE ICASSP'18, Apr. 2018, Calgary, Canada.
- J.M. Williams, J.P. Ruiz-Rosero, R. Khanna, G. Pisharody, Y. Qian, J. Wang, C. Carlson, H. Liu, G. Ramirez-Gonzalez, " Enabling densely-scalable low-power WSNs for shipping and industrial IoT," in Proc. IEEE UEMCON 2017, Oct. 2017, New York City, New York.
- C. Peng, F. Li, and H. Liu, "Hierarchically modulated network-coding-assisted cooperation in multiuser relay networks," in Proc. IEEE IEEE VTC17-Fall, Sep. 2017, Toronto, Canada.
- M. Alarfaj and H. Liu, "Subarray hybrid precoding for massive MIMO capacity maximization," in Proc. IEEE ICUWB 2017, Sep. 2017, Salamanca, Spain.
- M. Alarfaj and H. Liu, "Generalizing hybrid beamforming solutions for massive MIMO systems," in Proc. IEEE VTC17-Fall, Sep. 2017, Toronto, Canada.
- L. Wu, Z. Zhang, D. Dang, and H. Liu, "Enhanced time-shifted pilot based channel estimation in massive MIMO systems with finite number of antennas," in Proc. IEEE ICC'17, May 2017, Paris, France.
- C. Wei, Z. Zhang, and H. Liu, "Expectation-propagation based low-complexity channel estimation for massive MIMO systems," in Proc. IEEE ICC'17, May 2017, Paris, France.
- T. Qiao and H. Liu, "Incremental anchor layout for indoor positioning," in Proc. IEEE ICC'17, May 2017, Paris, France.
- K. Zhan, G. Wang, T. Kamgaing, R. Khanna, H. Braunisch, G. Dogiamis, H. Liu, and A. Natarajan, "A low-power 68GHz FSK/Spatial modulation transmitter for mm-Wave wireless links," in IEEE 2017 Int. Microwave Symp.,, June 4-9, Honolulu, Hawaii.
- G. Wang, K. Zhan, T. Kamgaing, R. Khanna, H. Liu, and R. Natarajan, "Measurement-based channel modeling for mmWave wireless links in enclosed server platforms," in Proc. IEEE Radio and Wireless Week,, Phoenix, Arizona, Jan. 2017.
- Z. Su, G. Shao, and H. Liu, "Synchronization-free model with signal repeater for timing-based localization," in Proc. IEEE VTC 2016-Fall,, Sep. Montreal, Canada.
- Z. Su, G. Shao, and H. Liu, "A soft-minimum method for NLOS error mitigation in TOA systems," in Proc. IEEE VTC 2016-Fall,, Sep. Montreal, Canada.
- C. Peng, F. Li, and H. Liu, "Multi-layer network coding for multiuser relay networks with non-uniform-rate users," in Proc. IEEE VTC 2016-Fall,, Sep. Montreal, Canada.
- L. Li, C. Zheng, and H. Liu, "Handover performance in 5G HetNets with millimeter wave cells," in Proc. 16th Int. Symp. Commun. and Information Technologies (ISCIT 2016),, Qingdao, China, Sep. 2016.
- L. Wu, Z. Zhang, J. Dang, and H. Liu, "Capacity lower bounds of IM/DD AWGN optical wireless channels based on Fano's inequality," in Proc. IEEE WCSP 2015, Hangzhou, China, Oct. 2015.
- Y. Whang, H. Liu, and S. Park, "HARQ transmission state control for throughput improvement in MIMO systems with interference cancellation," in Proc. IEEE VTC'15-Spring, Glasgow, Scotland, May 2015.
- L. Wu, Z. Zhang, J. Dang, and H. Liu, "Coefficients separation MIMO-OFDM optical wireless communication system in diffuse fading channels," in Proc. IEEE ICC'2015, U.K. June, 2015.
- N. Keskin and H. Liu, "Unit antenna based wireless power transfer systems," in Proc. 2015 65th IEEE Electronic Components and Technology Conference (ECTC), San Diego, CA, May 2015, pp. 1828-1833.
- N. Keskin and H. Liu, "Complementary Class-E amplifier for wireless power transfer," in Proc. 2015 65th IEEE Electronic Components and Technology Conference (ECTC), San Diego, CA, May 2015, pp. 2235-2240.
- K. Chae, H. Liu, and S. Yoon, "A transmission parameter optimization method for GA-based cognitive engines," in Proc. Int. Conf. on Wireless Networks, Bali, Indonesia, Sep. 2014.
- K. Chae, H. Liu, and S. Yoon, "Unambiguous BOC signal tracking based on partial correlations," in Proc. IEEE VTC'14-fall, Vancouver, Canada, Sep. 2014.
- N. Keskin and H. Liu, "Fast charging method for wireless and mobile devices using double-pulse charge technique," in Proc. IEEE Wireless Power Transfer Conference, Jeju, Korea, May 2014.
- N. Keskin and H. Liu, "Practical considerations on spread spectrum clocking," in Proc. IEEE Wireless Telecommunications Symposium, Washington D.C., April 2014.
- N. Keskin and H. Liu, "A low power receiver architecture for near field communication systems," in Proc. IEEE Wireless Telecommunications Symposium, Washington D.C., April 2014.
- Z. Su, J. Huschle, S. Redfield, T. Qiao, F. Liu, and H. Liu, "High-speed real-time multi-channel data-acquisition unit: challenges and results," in Proc. IEEE CCNC'14, Las Vegas, Jan. 2014.
- L. Wu, Z. Zhang, and H. Liu, “MIMO-OFDM visible light communications system with low complexity,” in Proc. IEEE ICC'13, Budapest, Hungary, June 2013.
- M. Adeli and H. Liu, "A high-throughput and low-complexity secure linear network coding protocol," in Proc. The 2013 Int. Conf. Security and Management (SAM'13), Las Vegas, July 2013.
- R. Khanna and H. Liu, “Machine learning approach to data center monitoring using wireless sensor networks,” in Proc. IEEE Globecom’12, Anaheim, CA, Dec. 2012.
- R. Khanna, D. Choudhury, P. Chiang, and H. Liu, “Innovative approach to machine monitoring in IT servers using wireless interconnects,” in Proc. IEEE RWW’12, Jan. 2012, Santa Clara, CA
- H. Zhang, H. Liu, and S. Quan, “Multi-illuminant color constancy for HDR images through exposure segmentation,” in Proc. IS&T/SPIE Electronic Imaging, Jan. 2012, Burlingame, CA
- L. Xia, C. Hu, S. Redfield1, S. Woracheewan1, R. Khanna, J. Nejedlo, H. Liu, and P. Y. Chiang, “Design challenges for ultra-wideband wireless communications within a computer chassis,” in Proc. RFIT 2011, Dec. 2011, Beijing, China.
- R. Ye and H. Liu, "Ultra-wideband localization with collocated receivers,” in Proc. IEEE ICUWB’11, Bologna, Italy, Sep. 2011.
- J. Wang, R. Ye, H. Liu, and R. Zhang, “'UWB signaling for CR and coherent receivers and localization with weak received signals,” in Proc. IEEE ICUWB’11, Bologna, Italy, Sep. 2011.
- H. Zhang, H. Liu, and S. Quan, "Color correction optimization with hue regularization," in Proc. SPIE Conf. Color Imaging XVI, San Francisco, CA, Jan. 2011.
- C. Weber, J. He, C. Zhong, and H. Liu, "Multiband Architecture for high-speed SerDes," in Proc. DesignCon 2011, Santa Clara, CA, Jan. 2011.
- S. L. Marple, Jr., M. Adeli, and H. Liu, "Superfast algorithm for minimum variance (Capon) spectral estimation," in Proc. 2009 Asilomar Conf. on Signals, Systems, and Computers, CA, Nov. 2010.
- W. Liu, K. Choi, and H. Liu, "Computationally efficient lattice reduction for MIMO-OFDM systems," in Proc. 2001 IEEE WiMob'10, Niagara Falls, Canada, Oct. 2010.
- H. Jiang, Z, Wang, and H. Liu, "Iterative symbol-by-symbol decoding of LDPC codes and constellation mapping for multilevel modulation," in Proc. ChinaCom'10, Beijing, China, Aug. 2010.
- R. Ye, S. Redfield, and H. Liu, "High-precision indoor UWB localization: Technical challenges and method," in Proc. IEEE ICUWB'10, Sep. 2010.
- R. Ye and H. Liu, "UWB TDOA localization system: Receiver configuration analysis," in Proc. IEEE ISSSE'10, Sep. 2010.
- F. Yildirim and H. Liu, "A practical double directional channel model for 60 GHz wireless communication networks," in Proc. IEEE ICC'10, May 23-27, 2010.
- R. Khanna, H. Liu, and H. H. Chen, "Self-organization of wireless sensor network for autonomous control in an IT server platform,"Proc. IEEE ICC'10, May 2010.
- R. Whang, H. Liu, and E.-K. Hong, "Multiuser cooperative relay communication employing hierarchical modulation," in Proc. IEEE VTC'10-Spring, May 16-19, 2010.
- W. Liu, K. Choi, and H. Liu, "Complexity-reduced channel matrix inversion for MIMO systems in time-varying channels," in Proc. IEEE VTC'10-Spring, May 16-19, 2010.
- J. He, Z. Wang, and H. Liu, "Low-complexity memory-reduced MAP decoding for double-binary convolutional turbo code," in Proc. IEEE ISCAS'10, June 2010.
- H. Zhang, S. Quan, and H. Liu, "An alternative method to sensor spectral characterization," in Proc. 31st Int. Congress on Imaging Science (ICIS2010), Beijing, May 2010.
- C. Hu, P, Chiang, K, Hu, H. Liu, R. Khanna, and J. Nejedlo, "A 90nm-CMOS, 500Mbps, fully-integrated IR-UWB transceiver using pulse injection-locking for receiver phase synchronization," in Proc. 2010 Frequency Integrated Circuits (RFIC) Symposium, Anaheim, CA, May 2010.
- S. Baek, R. Ye, C. Hu, S. Redfield, H. Liu, T. Hayes, and P. Chiang "Preliminary study of indoor ultrawideband localization for at-home patient monitoring," in Proc. 1st AMA-IEEE Medical Technology Conf. on Individualized Healthcare, Washington, DC, Mar. 2010. (1-page abstract)
- G. Dong, Y. Li, N. Xie, T. Zhang, and H. Liu, "Candidate bit based bit-flipping decoding algorithm for low-density parity-check codes," in Proc. 2009 IEEE Int. Symp. Inform. Theory, Seoul, Korea, July 2009.
- R. Khanna, H. Liu, and H.-H. Chen, "Reduced complexity intrusion detection in sensor networks using genetic algorithm,"in Proc. IEEE ICC'09, June 2009, Dresden, Germany.
- K. Choi, D. Lim, and H. Liu, "Optimum power allocation for distributed antenna systems with large-scale fading-only feedback," in Proc. IEEE ITNG'09, April, 2009, Las Vegas, U.S.A.
- C. Hu, S. Redfield, H. Liu, R. Khanna, J. Nejedlo, and P. Chiang, "Transmitter equalization for multipath interference cancellation in impulse radio, ultra-wideband (IR-UWB) transceivers", in Proc. IEEE Int. Symp. VLSI Design, Automation, and Test, Apr. 2009, pp. 307–310.
- J. He, H. Liu, and Z. Wang, "A fast ACSU architecture for Viterbi decoder using T-algorithm," in Proc. 2009 Asilomar Conference on Signals, Systems, and Computers, 2009.
- J. He, Z. Wang, and H. Liu, "Low-complexity high-speed 4-D TCM decoder," in Proc. 2008 IEEE Workshop on Signal Processing Systems, Washington D.C., Oct., 2008.
- R. Whang, H. Liu, and E.-K. Hong, "Transmission pattern selection for relay communication with distributed space-time codes," in Proc. 11th IEEE International Conference on Communication Systems, Guangzhou, China, Nov. 2008.
- R. Khanna, H. Liu, H. H. Chen, "Proactive power optimization of sensor networks," in Proc. IEEE ICC’08, May. 2008.
-
H. Liu, A. F. Molisch, S. Zhao, D. L. Goeckel, and P.
Orlik, "Hybrid coherent and frequency-shifted-reference ultrawideband
radio," in Proc. IEEE Globecom'07, Nov. 2007.
-
F. Yildirim and H. Liu, "Directional MAC for 60 GHz
using polarization diversity extension (DMAC-PDX)," in Proc.
IEEE Globecom'07, Nov. 2007.
-
R.
Khanna, H. Liu, and H. H. Chen, ``Dynamic optimization of secure mobile
sensor networks: a genetic algorithm,''
in
Proc. IEEE ICC'07, June 2007
-
R. Khanna and H. Liu, "Distributed and control
theoretic approach to intrusion detection," in Proc. ACM
IWCMC'07, Mar. 2007.
-
O. C. Ozdural and H. Liu, "Phase noise suppression
for OFDM systems over fast time-varying channels," in Proc. IEEE ICC’07, June 2007.
-
O. C. Ozdural and H. Liu, "
Mobile
direction assisted predictive base station switching for broadband wireless
systems," in Proc. IEEE ICC'07,
June 2007.
-
T. Nam, E.-K. Hong, and H. Liu, "New hybrid decision
feedback equalization for DS-CDMA systems," in
Proc. of IEEE WCNC'07, Mar. 2007.
-
X.
Zhang, J. Lee, and H. Liu,
"Low complexity multiuser MIMO scheduling with channel decomposition," in
Proc. of IEEE WCNC'07,
Mar. 2007.
-
R. Khanna and H. Liu, "System approach to
intrusion detection using hidden Markov model," in Proc. International
Wireless Communications and Mobile Computing Conference (IWCMC 2006),
Vancouver, Canada, July 2006.
-
Y. Choi, O. Ozdural, H. Liu, and S. Alamouti, "A
maximum likelihood Doppler frequency estimator for OFDM systems," in
Proc. IEEE ICC'06, Istanbul, Turkey, June 2006.
-
L. Xian, R. Punnoose, and H. Liu, "Space-time
block coded GMSK with low-complexity linear receiver," in Proc. IEEE
ICC'06, Istanbul, Turkey, June 2006.
-
R. Khanna, H. Liu, and H. H. Chen,
"Self-organization of sensor networks using genetic algorithms,"
in Proc. IEEE ICC'06, Istanbul, Turkey, June 2006.
-
H. H. Chen, J. Li, Y. Yang, X. Du, and H. Liu,
"Challenges and futuristic perspective of CDMA technologies: OCC-CDMA/OS
for 4G wireless networks," in Proc. IEEE ICC'06, Istanbul,
Turkey, June 2006.
-
H. Liu, "Multi-code ultra-wideband signaling using
chirp waveforms," in Proc. of IEEE MILCOM'05, Oct. 2005.
-
S. Zhao and H. Liu, ``Prerake diversity combining for pulsed UWB systems
considering realistic channels with pulse overlapping and narrow-band
interference,'' Proc. of IEEE Globecom 2005,
Nov. 2005.
-
J. Gao, O. Ozdural, S. Ardalan, and H. Liu,
"Performance modeling of MIMO OFDM channels," in Proc. of 12th
International Conference on Wireless Communications, Calgary, Canada,
July 2005.
- Y. Zhang and H. Liu, ``Decision-feedback receiver for quasi-orthogonal
space-time coded OFDM with correlative coding over fast fading channels,'' in Proc. of IEEE VTC 2005-Fall, Sep.
2005.
- L. Xian and H. Liu, ``An adaptive power allocation scheme for space-time block
coded MIMO systems,'' in Proc. of IEEE WCNC'05, pp. 504-508, Mar. 2005.
- Z. Zhao, H. Liu, and Z. Tian,
``A decision-feedback authcorrelation receiver for
pulsed ultra-wideband systems," in Proc. of IEEE 2004 Radio and Wireless
Conference (Rawcon'04), Sep. 2004.
- S. Zhao, H. Liu, and
S. Mo
,
``Performance of a multi-band ultra-wideband system over indoor wireless
channels," in Proc. of IEEE CCNC'04, Jan. 2004.
- H. Liu, ``A high-rate transmission scheme for
ultra-wideband systems," Proc. of 2003 WNCG Wireless Networking Symposium,
The University of Texas at
Austin,
Oct. 2003.
- V. Venkatesan, H. Liu, C. Nilsen,
R. Kyker, and M. E. Magana, ``Performance
of an optimally spaced PPM ultra-wideband system with direct sequence spreading
for multiple access,'' Proc. of IEEE VTC03-Fall, Oct. 2003.
- H. Liu, ``Error
performance of MIMO systems in frequency-selective Rayleigh
fading channels,'' in Proc. of IEEE Globecom'03, Dec. 2003.
- A. Tjahjadi, M. Magana, and Huaping Liu,
``Turbo-coded OCC-CDMA with spatial diversity for wireless mobile
communications,'' in Proc. of the 15th International Conference on Wireless
Communications, July 2003.
- M. E. Magana and H. Liu, ``A multi-carrier CDMA system design based on
orthogonal complementary codes,'' in Proc. IEEE Vehicular Technology Conference (Fall'03), 2003.
- H. Liu, V. Venkatasen, C. Nilsen,
R. Kyker, M. Magana, ``Performance
of frequency hopped noncoherent GFSK in correlated
Rayleigh fading channels," in Proc. of 2003 IEEE
International Conference of Communications, Anchorage, Alaska, May 11-15,
2003, pp. 2779-2783.
- H. Liu, ``An iterative algorithm for path loss
modeling with field measurement data," Proc. of the 7th CDMA
International Conference,
Seoul,
Krea, Nov.
2002, pp. 183-186.
- H. Liu, ``Packet queuing delay-throughput tradeoffs for WCDMA system
reverse link with mixed traffic,'' in Proc. of the 7th CDMA International
Conference, vol. 2, Nov. 2002, pp. 71-74.
- H. Liu, Z. Siveski, and N. Ansari, ``Fractionally spaced
coherent detection with DF MAP estimation of statistically known time-varying
Rayleigh fading channel," in Proc. of 1997 IEEE Global
Communications Conference,
Phoenix,
AZ, Nov. 1997, pp. 419-423.
- H. Liu, Z. Siveski, and N. Ansari, ``Coherent decorrelating
detector with imperfect channel estimates for CDMA Rayleigh
fading channels," in Proc. of 1997 IEEE International Conference on
Communications, Montreal, Canada, June 1997, pp. 600-604.
- H. Liu and Z. Siveski, ``A method of
calculating transmitted power of mobiles in sectored cellular CDMA reverse link
with imperfect power control,'' in Proc. of the 31st Annual Conference on
Information Sciences and Systems, John Hopkins University, Baltimore, MD,
Mar. 1997, pp. 299-302.
- H. Liu and Z. Siveski, ``Differentially
coherent CDMA multiuser detector for
Rayleigh fading channels,'' in Proc. of the 30th Annual
Conference on Information Sciences and Systems, Princeton University,
Princeton, NJ, Mar. 1996, pp. 86-89.