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Featured researches published by Xiaowen Wang.


global communications conference | 2009

Scale-Only Tomlinson-Harashima Precoding

Kai Xie; Jing Li; Xiaowen Wang; Syed Aon Mujtaba

With the introduction of a dither sequence and scaling factors, dithered Tomlinson-Harashima precoding (THP) has shown to outperform conventional spatial THP in multi-user MIMO systems. Through a careful analysis of dithered THP, this paper exhibits that it is not only possible, but also beneficial, to eliminate the dither sequence and develop efficient scale-only THP, and the key is to resolve the scaling factors. By capturing the dependency of the interference level on the scaling factors through a closed-form piece-wise function, we formulated a new method to optimize the scaling factors. We present that the new scale-only THP is not only simpler, but also performs better. As much as 1 dB of performance gain is observed at the low signal-to-noise region.


Archive | 2013

METHODS AND APPARATUS FOR COEXISTENCE OF WIRELESS SUBSYSTEMS IN A WIRELESS COMMUNICATION DEVICE

William S. Burchill; Paul V. Flynn; Vinay R. Majjigi; Xiaowen Wang; Kee-Bong Song; Syed Aon Mujtaba; Wen Zhao


Archive | 2012

Uplink and/or Downlink Testing of Wireless Devices in a Reverberation Chamber

Xiaowen Wang; Weiping Dou; Warren Lee; Zhaojun Cheng; Syed Aon Mujtaba


Archive | 2011

LTE/1x dual-standby with single-chip radio

Syed Aon Mujtaba; Wen Zhao; Xiaowen Wang; Vinay R. Majjigi; Isabel G. Mahe


Archive | 2012

Dual network mobile device radio resource management

Wen Zhao; Syed Aon Mujtaba; Xiaowen Wang; Vinay R. Majjigi; Isabel G. Mahe


Archive | 2012

Transmission power modulation to facilitate in-device coexistence between wireless communication technologies

William S. Burchill; Vinay R. Majjigi; Xiaowen Wang


Archive | 2012

Adaptive random access channel retransmission

Kee-Bong Song; Xiaowen Wang; Syed Aon Mujtaba


Archive | 2014

Adaptive receive diversity during discontinuous reception in mobile wireless device

Syed Aon Mujtaba; Kee-Bong Song; Xiaowen Wang; Young Jae Kim; Vinay R. Majjigi; Johnson O. Sebeni; Romain Trilling; Tahir Shamim; Karthik Anatharaman


Archive | 2012

APPARATUS AND METHODS FOR SYNCHRONIZATION RECOVERY IN A HYBRID NETWORK

Wen Zhao; Xiaowen Wang; Vinay R. Majjigi; Paul V. Flynn; Kee-Bong Song; Tarik Tabet; Youngjae Kim; Syed Aon Mujtaba; Christian W. Mucke


Archive | 2013

Methods and apparatus for adaptive receiver diversity in a wireless network

Syed Aon Mujtaba; Xiaowen Wang; Tarik Tabet; Kee-Bong Song; Youngjae Kim; Yuchul Kim

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