Learn More
The multicast mobile ad-hoc network (multicast MANET) is proposed for a sender sending packets to several receivers through a multicast session. Since members of a multicast group changes frequently, the issue of supporting secure authentication and authorization in multicast MANET becomes more critical than the network provided a fixed central(More)
This study focuses on two issues: parametric modeling of the channel and index assignment of codevectors, to design a vector quantizer that achieves high robustness against channel errors. We first formulate the design of a robust zero-redundancy vector quantizer as a combinatorial optimization problem leading to a genetic search for a minimum-distortion(More)
This study focuses on two issues: parametric modeling of the channel and index assignment of codevectors, to design a vector quantizer that achieves high robustness against channel errors. We first formulated the design of a robust zero-redundancy vector quantizer as a combinatorial optimization problem leading to a genetic search for the minimum distortion(More)
Taking cucumber cultivar 'Jinchun 4' as test material, a pot experiment was conducted to study the effects of soil compaction stress on cucumber root growth, respiration rate, activity, and nitrogen metabolism at different development stages. Two treatment were installed, i. e., bulk density 1.25 g x cm(-3) (loose soil, CK) and 1.55 g x cm(-3) (compacted(More)
Based on the IEEE 802.16e standard, WiMAX proposes a Mobile Multihop Relay (MMR) approach defined in the IEEE 802.16j standard to extend the service area of Base Stations (BSs), and then improves the quality of received signal strength. Clearly, WiMAX MMR achieves a low-cost coverage-extension solution for the existing WiMAX network. WiMAX MMR supports(More)
  • 1