研究多输入多输出(Multiple-Input Multiple-Output,MIMO)声纳阵列都是以均匀线列阵(Uniform Linear Array,ULA)为主,而非均匀线列阵列(Non-Uniform Linear Array,NLA)能产生更多的虚拟阵元,达到较高的目标检测分辨概率以及估计精度。...研究多输入多输出(Multiple-Input Multiple-Output,MIMO)声纳阵列都是以均匀线列阵(Uniform Linear Array,ULA)为主,而非均匀线列阵列(Non-Uniform Linear Array,NLA)能产生更多的虚拟阵元,达到较高的目标检测分辨概率以及估计精度。为了提高检测和估计精度,提出了一种基于最小冗余阵列的MIMO声纳发射接收阵列结构优化算法建立阵列模型进行仿真。仿真结果表明,上述方法设计的MIMO声纳系统在目标分辨概率和估计误差方面性能均有提高,尤其在低信噪比条件下效果更好。展开更多
This paper presents a method for differen- tial collision attack of reduced FOX block cipher based on 4-round distinguishing property. It can be used to attack 5, 6 and 7-round FOX64 and 5-round FOX128. Our attack has...This paper presents a method for differen- tial collision attack of reduced FOX block cipher based on 4-round distinguishing property. It can be used to attack 5, 6 and 7-round FOX64 and 5-round FOX128. Our attack has a precomputation phase, but it can be obtained before attack and computed once for all. This attack on the reduced to 4-round FOX64 requires only 7 chosen plaintexts, and performs 242.8 4-round FOX64 encryptions. It could be extended to 5 （6, 7）-round FOX64 by a key exhaustive search behind the fourth round.展开更多
文摘研究多输入多输出(Multiple-Input Multiple-Output,MIMO)声纳阵列都是以均匀线列阵(Uniform Linear Array,ULA)为主,而非均匀线列阵列(Non-Uniform Linear Array,NLA)能产生更多的虚拟阵元,达到较高的目标检测分辨概率以及估计精度。为了提高检测和估计精度,提出了一种基于最小冗余阵列的MIMO声纳发射接收阵列结构优化算法建立阵列模型进行仿真。仿真结果表明,上述方法设计的MIMO声纳系统在目标分辨概率和估计误差方面性能均有提高,尤其在低信噪比条件下效果更好。
基金This work has been performed in the Project "The Research on the New Analysis in Block Ciphers" supported by the Fundamental Research Funds for the Central Universities of China，the National Natural Science Foundation of China，the 111 Project of China，the Scientific Research Foundation of Education Department of Shaanxi Provincial Government of China
文摘This paper presents a method for differen- tial collision attack of reduced FOX block cipher based on 4-round distinguishing property. It can be used to attack 5, 6 and 7-round FOX64 and 5-round FOX128. Our attack has a precomputation phase, but it can be obtained before attack and computed once for all. This attack on the reduced to 4-round FOX64 requires only 7 chosen plaintexts, and performs 242.8 4-round FOX64 encryptions. It could be extended to 5 （6, 7）-round FOX64 by a key exhaustive search behind the fourth round.
