265 citations · 764 across the 36 of their papers we have counts for
11 papers · 1 filter
Performance and Compensation of I/Q Imbalance in Differential STBC-OFDM
Lei Chen, Ahmed G. Helmy, Guangrong Yue +2
Differential space time block coding (STBC) achieves full spatial diversity and avoids channel estimation overhead. Over highly frequency-selective channels, STBC is integrated wit…
Performance Analysis and Compensation of Joint TX/RX I/Q Imbalance in Differential STBC-OFDM
Lei Chen, Ahmed G. Helmy, Guangrong Yue +2
Differential space time block coding (STBC) achieves full spatial diversity and avoids channel estimation overhead. Over highly frequency-selective channels, STBC is integrated wit…
Learning-Based Coexistence in Two-Tier Heterogeneous Networks with Cognitive Small Cells
Lin Zhang, Guodong Zhao, Wenli Zhou +3
We study the coexistence problem in a two-tier heterogeneous network (HetNet) with cognitive small cells. In particular, we consider an underlay HetNet, where the cognitive small b…
On Artificial-Noise Aided Transmit Design for Multi-User MISO Systems with Integrated Services
Weidong Mei, Zhi Chen, Lingxiang Li +2
This paper considers artificial noise (AN)-aided transmit designs for multi-user MISO systems in the eyes of service integration. Specifically, we combine two sorts of services, an…
Decentralized Caching Schemes and Performance Limits in Two-layer Networks
Lin Zhang, Zhao Wang, Ming Xiao +3
We study the decentralized caching scheme in a two-layer network, which includes a sever, multiple helpers, and multiple users. Basically, the proposed caching scheme consists of t…
Primary Channel Gain Estimation for Spectrum Sharing in Cognitive Radio Networks
Lin Zhang, Guodong Zhao, Wenli Zhou +4
In cognitive radio networks, the channel gain between primary transceivers, namely, primary channel gain, is crucial for a cognitive transmitter (CT) to control the transmit power…