725 citations · 6.1k across the 252 of their papers we have counts for
15 papers · 2 filters
Multi-User SISO Precoding based on Generalized Multi-Unitary Decomposition for Single-carrier Transmission in Frequency Selective Channel
Wee Seng Chua, Chau Yuen, Yong Liang Guan +1
In this paper, we propose to exploit the richly scattered multi-path nature of a frequency selective channel to provide additional degrees of freedom for desigining effective preco…
A Continuous Vector-Perturbation for Multi-Antenna Multi-User Communication
Wee Seng Chua, Chau Yuen, Francois Chin
The sum-rate of the broadcast channel in a multi-antenna multi-user communication system can be achieved by using precoding and adding a regular perturbation to the data vector. Th…
Comparative Study of Open-loop Transmit Diversity Schemes for Four Transmit Antennas in Coded OFDM Systems
Chau Yuen, Yan Wu, Sumei Sun
We compare four open-loop transmit diversity schemes in a coded Orthogonal Frequency Division Multiplexing (OFDM) system with four transmit antennas, namely cyclic delay diversity…
Comparative Study of SVD and QRS in Closed-Loop Beamforming Systems
Chau Yuen, Sumei Sun, Jian-Kang Zhang
We compare two closed-loop beamforming algorithms, one based on singular value decomposition (SVD) and the other based on equal diagonal QR decomposition (QRS). SVD has the advanta…
Bi-Directional Multi-Antenna Relay Communications with Wireless Network Coding
Chau Yuen, Woon Hau Chin, Yong Liang Guan +2
In this paper, we consider a two-way or bidirectional communications system with a relay equipped with multiple antennas. We show that when the downlink channel state information i…
Four-node Relay Network with Bi-directional Traffic Employing Wireless Network Coding with Pre-cancellation
Su Kiang Kuek, Chau Yuen, Woon Hau Chin
Network coding has the potential to improve the overall throughput of a network by combining different streams of data and forwarding them. In wireless networks, the wireless chann…
Beamforming Matrix Quantization with Variable Feedback Rate
Chau Yuen, Sumei Sun, Mel Meau Shin Ho
We propose an improved beamforming matrix compression by Givens Rotation with the use of variable feedback rate. The variable feedback rate means that the number of bits used to re…
Limited Feedback for Multi-Antenna Multi-user Communications with Generalized Multi-Unitary Decomposition
Wee Seng Chua, Chau Yuen, Yong Liang Guan +1
In this paper, we propose a decomposition method called Generalized Multi-Unitary Decomposition (GMUD) which is useful in multi-user MIMO precoding. This decomposition transforms a…
On the Search for High-Rate Quasi-Orthogonal Space-Time Block Code
Chau Yuen, Yong Liang Guan, Tjeng Thiang Tjhung
A Quasi-Orthogonal Space-Time Block Code (QO-STBC) is attractive because it achieves higher code rate than Orthogonal STBC and lower decoding complexity than nonorthogonal STBC. In…
Optimizing Quasi-Orthogonal STBC Through Group-Constrained Linear Transformation
Chau Yuen, Yong Liang Guan, Tjeng Thiang Tjhung
In this paper, we first derive the generic algebraic structure of a Quasi-Orthogonal STBC (QO-STBC). Next we propose Group-Constrained Linear Transformation (GCLT) as a means to op…
Power-Balanced Orthogonal Space-Time Block Code
Chau Yuen, Yong Liang Guan, Tjeng Thiang Tjhung
In this paper, we propose two new systematic ways to construct amicable orthogonal designs (AOD), with an aim to facilitate the construction of power-balanced orthogonal spacetime…
Achieving Near-Capacity at Low SNR on a Multiple-Antenna Multiple-User Channel
Chau Yuen, Bertrand M. Hochwald
We analyze the sensitivity of the capacity of a multi-antenna multi-user system to the number of users being served. We show analytically that, for a given desired sum-rate, the ex…
Unitary Differential Space-Time Modulation with Joint Modulation
Chau Yuen, Yong Liang Guan, T. T. Tjhung
We develop two new designs of unitary differential space-time modulation (DSTM) with low decoding complexity. Their decoder can be separated into a few parallel decoders, each of w…
Differential Transmit Diversity Based on Quasi-Orthogonal Space-Time Block Code
Chau Yuen, Yong Liang Guan, Tjeng Thiang Tjhung
By using joint modulation and customized constellation set, we show that Quasi-Orthogonal Space-Time Block Code (QO-STBC) can be used to form a new differential space-time modulati…
Full Diversity Blind Signal Designs for Unique Identification of Frequency Selective Channels
Jian-Kang Zhang, Chau Yuen
In this paper, we develop two kinds of novel closed-form decompositions on phase shift keying (PSK) constellations by exploiting linear congruence equation theory: the one for fact…