Index Catalog // ScholarsArchive@OSU

Creator:: Choi, Kwonhue and Liu, Huaping
Abstract:: Polyphase complex scrambling patterns are designed to extend the zero-correlation zone (ZCZ) of a family of user spreading sequences, called properly scrambled Walsh-Hadamard (PSW) codes, recently proposed for quasi-synchronous (QS) code-division multiple-access systems. The merits of the binary (ZCZ equals 2) and quadri-phase (ZCZ equals 4) PSW codes over the...
Resource Type:: Article
Full Text:: Extension in QS-CDMA Kwonhue Choi, Senior Member, IEEE and Huaping Liu, Senior Member, IEEE Abstract

Creator:: Qiao, Tianzhu and Liu, Huaping
Abstract:: Non-line-of-sight (NLOS) propagation is one of the major problems that cause errors in localization systems. There exist many algorithms to reduce NLOS caused errors. Most of these algorithms require a priori information about the NLOS links, which limits their application. Least median of squares (LMedS) method is an exception and...
Resource Type:: Article
Full Text:: Mitigation Tianzhu Qiao and Huaping Liu, Senior Member, IEEE Abstract—Non-line-of-sight (NLOS) propagation

Creator:: Qiao, Tianzhu and Liu, Huaping
Abstract:: Estimation accuracy and computational complexity are two major areas of consideration for localization system design. For time-of-arrival based systems, the 1st-order method of moments (MOM) least-square (LS) estimator is simple to implement, but its performance is much worse than that of some computationally more complex estimators such as the MOM...
Resource Type:: Article
Full Text:: Localization 1 An Improved Method of Moments Estimator for TOA Based Localization Tianzhu Qiao and Huaping

Creator:: Liu, Wei, Choi, Kwonhue, and Liu, Huaping
Abstract:: We analyze the relationship between channel coherence bandwidth and two complexity-reduced lattice reduction aided detection (LRAD) algorithms for multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems in correlated fading channels. In both the adaptive LR algorithm and the fixed interval LR algorithm, we exploit the inherent feature of unimodular...
Resource Type:: Article
Full Text:: Technology (2009-0088286). Wei Liu (phone: +1 541 740 0192, liu@eecs.oregonstate.edu) and Huaping Liu

Creator:: Sohn, Insoo, Liu, Huaping, and Ansari, Nirwan
Abstract:: An important issue in the cellular industry is the rising energy cost and carbon footprint due to the rapid expansion of the cellular infrastructure. Greening cellular networks has thus attracted attention. Among the promising green cellular network techniques, the renewable energy-powered cellular network has drawn increasing attention as a critical...
Resource Type:: Article
Full Text:: Learning Sohn, I., Liu, H., & Ansari, N. (2015). Optimizing Cellular Networks Enabled with Renewal Energy

Creator:: Zhang, Heng, Liu, Huaping, and Quan, Shuxue
Abstract:: A method for preferred color reproduction with a psychophysical study based upon a real-life scene demonstrated application is presented. A color correction matrix optimization algorithm is first introduced which applies additional hue constraints on top of the CIE delta E magnitude error to emphasize the importance of hue in the...
Resource Type:: Article
Full Text:: preferred color reproduction Heng Zhang Huaping Liu Shuxue Quan Downloaded From: http

Creator:: He, Jinjin, Liu, Huaping, Wang, Zhongfeng, Huang, Xinming, and Zhang, Kai
Abstract:: High-speed, low-power design of Viterbi decoders for trellis coded modulation (TCM) systems is presented in this paper. It is well known that the Viterbi decoder (VD) is the dominant module determining the overall power consumption of TCM decoders. We propose a pre-computation architecture incorporated with T-algorithm for VD, which can...
Resource Type:: Article
Full Text:: . 30, 2010. Jinjin He and Huaping Liu are with the School of Electrical Engineering and Computer