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In Journal of Systems Engineering and Electronics, Maet al. proposed a broadcast group-oriented encryption secure against chosen cipher text attack scheme, later they proposed several other chosen cipher text secure group-oriented encryption schemes, based on this scheme, they also proposed a group-based proxy re-encryption scheme secure against chosen cipher text attack. However, in this paper we...
Considering the potential interference of ultra-wide hand (UWB) system to OFDM based narrowband wireless communication system, such as IEEF. 802.1 In system, this paper investigates the optimal power allocation scheme for Impulse Radio UWB (1R-IIWB) user in order to maximize the total transmission rate of UWB with the constraints that its interference to IEEE 802.11n user is below a certain threshold...
In radio navigation system working on medium-short wave band, serious multipath interference and atmosphere noise make the precision of code tracking loop decrease. In order to improve the positioning precision, carrier phase measurement is generally adopted, but carrier ambiguity resolution is a key problem. Based on the analysis of multipath error of code tracking loop, a carrier ambiguity resolution...
To find the optimal station distribution algorithm and improve the positioning accuracy of working area, the relationship between the GDOP value and the station distribution on hyperbolic positioning mode and range-range positioning mode was analyzed. Simultaneously, under fixed station distribution, the positioning accuracy distribution on two different positioning modes was calculated and compared...
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