Chenyang Yang

Beijing University of Aeronautics and Astronautics (Beihang University), Peping, Beijing, China

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Publications (2)0 Total impact

  • Hongyu Gu, Chenyang Yang
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    ABSTRACT: In this paper, we consider the power and admission control for ultra-wideband (UWB) cognitive radio networks, which are important to provide secondary users guaranteed quality of service while not causing severe interference to primary users. A power control algorithm to maximize the minimal data rate of all admitted secondary users is developed by solving a quasi-convex optimization problem. An admission control algorithm is also proposed to reject secondary users, which induce infeasible power control or low sum data rate, by a new criterion - the channel gain ratio. The channel gains used in the proposed algorithms are estimated by exploiting the ranging capability of UWB radios. The estimation error due to unpredicted channel shadowing is coped with the interference hole and the signal-to-interference-noise ratio margin. Finally, the performance of the presented power and admission control strategy is examined through simulations.
    Proceedings of IEEE International Conference on Communications, ICC 2008, Beijing, China, 19-23 May 2008; 01/2008
  • Hongyu Gu, Chenyang Yang
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    ABSTRACT: Ultra-wideband (UWB) radio is an emerging wireless physical layer technology which is considered the candidate for high data rate transmission or medium/low data rate asynchronous code-division multiple-access (CDMA) ad hoc networks thanks to its huge process gain (PG). On the other hand, UWB systems suffer long acquisition time (AT) led by the large bandwidth which induces a significant overhead. Hence, it is very important to understand the impact of both the huge PG and the long AT on network performance for designing efficient UWB networks. In this paper, we study the throughput performance of a peer-to-peer asynchronous CDMA network supported by a full duplex UWB physical layer taking into account above two distinct UWB features. Numerical results show that fast acquisition, multi-packet reception and network cooperation are necessary to improve the throughput of UWB asynchronous CDMA ad hoc networks.
    Vehicular Technology Conference, 2006. VTC-2006 Fall. 2006 IEEE 64th; 10/2006

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6 Citations

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  • 2008
    • Beijing University of Aeronautics and Astronautics (Beihang University)
      Peping, Beijing, China