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This paper presents our developed two-chip wireless communication system adhering to the IEEE 802.11ad standards with a baseband IC (BBIC) integrated with a low power 60 GHz transceiver SOC (RFIC) and antennas. The novel low power 60GHz RFIC using a sub-harmonic sliding-IF scheme is fully integrated based on low cost SiGe 0.18 um BiCMOS process. The BBIC uses an adaptive time domain equalizer rather...
With the TM images in 1990 and 2005 and in the support of RS and GIS techniques, this paper applies the maximum likelihood classification and the Fragstats3.3 calculation software to calculate and analyze 9 landscape indices in three counties, Heng dong County, Hengshan County and Hengyang City. The studies have shown that: 1. For the three studied cities, the reduction of woodland is largest than...
Based on land use and urban plan maps, we extraced urban land information of Chongqing urban area in periods of 1995,2000.2008. With the help of GIS softwares and statistical analysis model, such indexes as expansion speed, expansion intensity, expansion direction, expansion morphological, and landscape features were used. This paper analyzed the spatio-temporal characteristics of urban land expansion...
Certificate-based encryption (CBE) is a new paradigm which overcomes the shortcomings of traditional public-key encryption (PKE) and identity based encryption (IBE). CBE provides an efficient implicit certificate mechanism to eliminate third-party queries for the certificate status and to simplify the certificate revocation problem in traditional PKI. Therefore, CBE can be used to construct an efficient...
Along with the developments of mobile services, effectively modeling road networks and efficiently indexing and querying network constrained objects has become a challenging problem. In this paper, we first introduce a road network model which captures real-life road networks better than previous models. Then, based on the proposed model, we propose a novel index named the RNG (road network grid)...
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