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- Xin Kang, Ying-Chang Liang, Arumugam Nallanathan, Hari Krishna Garg, Rui Zhang
- IEEE Transactions on Wireless Communications
- 2009
A cognitive radio network (CRN) is formed by either allowing the secondary users (SUs) in a secondary communication network (SCN) to opportunistically operate in the frequency bands originally… (More)
- Jinhua Jiang, Yan Xin, Hari Krishna Garg
- 2007 IEEE International Conference on Acoustics…
- 1982
In this paper, we establish the capacity region of a class of deterministic interference channels with common information. For such a class of channels, each sender needs to transmit not only the… (More)
- Hon-Fah Chong, Mehul Motani, Hari Krishna Garg, Hesham El Gamal
- IEEE Trans. Information Theory
- 2008
In this correspondence, a simplified description of the Han-Kobayashi rate region for the general interference channel is derived. Using this result, we establish the equivalence between the… (More)
- Xin Kang, Ying-Chang Liang, Hari Krishna Garg, Lan Zhang
- IEEE Transactions on Vehicular Technology
- 2008
In this paper, a new spectrum-sharing model called sensing-based spectrum sharing is proposed for cognitive radio networks. This model consists of two phases: In the first phase, the secondary user… (More)
- Xin Kang, Rui Zhang, Ying-Chang Liang, Hari Krishna Garg
- IEEE Journal on Selected Areas in Communications
- 2011
In this paper, we consider a cognitive radio (CR) network where a secondary (cognitive) user shares the spectrum for transmission with a primary (non-cognitive) user over block-fading (BF) channels.… (More)
- Himal A. Suraweera, Hari Krishna Garg, Arumugam Nallanathan
- IEEE Communications Letters
- 2010
We analyze the performance of a two hop channel state information (CSI)-assisted amplify-and-forward system, with co-channel interference at the relay. The system's outage probability and the average… (More)
- Hon-Fah Chong, Mehul Motani, Hari Krishna Garg
- IEEE Trans. Information Theory
- 2007
We consider the two-user “Z” channel (ZC), where there are two senders and two receivers. One of the senders transmits information to its intended receiver (without interfering with the unintended… (More)
- Xin Kang, Hari Krishna Garg, Ying-Chang Liang, Rui Zhang
- IEEE Transactions on Wireless Communications
- 2010
This paper considers a spectrum underlay network, where an OFDM-based cognitive radio (CR) system is allowed to share the subcarriers of an OFDMA-based primary system for simultaneous transmission.… (More)
- Xin Kang, Ying-Chang Liang, Hari Krishna Garg
- 2011 IEEE International Conference on…
- 2011
In this paper, we investigate the distributed power allocation strategies for a spectrum-sharing femtocell network, where a central macrocell underlaid with several femtocells. Assuming that the… (More)
- Madushanka Soysa, Himal A. Suraweera, Chintha Tellambura, Hari Krishna Garg
- IEEE Transactions on Communications
- 2012
This paper investigates the impact of using outdated channel estimates for relay selection and signal amplification on the performance of amplify-and-forward (AF) relays under partial relay selection… (More)