居民电子健康档案,英文全称electronic health records,简写EHR,是人们在相关健康活动中形成并保存下来备查的电子健康历史记录。它依托微机进行管理,是一种针对个人提供医疗保健服务,具有安全保密性的个人终身化医疗健康档案。EHR以居...居民电子健康档案,英文全称electronic health records,简写EHR,是人们在相关健康活动中形成并保存下来备查的电子健康历史记录。它依托微机进行管理,是一种针对个人提供医疗保健服务,具有安全保密性的个人终身化医疗健康档案。EHR以居民的个体健康为中心,是一项通过将整个个体生命过程连接起来,记录各种健康因素,多渠道、动态化收集健康信息,以满足健康保健、健康管理及医疗诊断的信息资源。展开更多
To investigate the impact of antenna correlation on secrecy performance in MIMO wiretap channels with Nakagami-m fading, the expressions of secrecy outage probability and positive secrecy probability were derived. Div...To investigate the impact of antenna correlation on secrecy performance in MIMO wiretap channels with Nakagami-m fading, the expressions of secrecy outage probability and positive secrecy probability were derived. Diversity order and array gain were also achieved for further insight. The study was based on the information theory that physical layer security can be guaranteed when the quality of the main channel is higher than that of the eavesdropper's channel. Monte Carlo simulations well validated the numerical results of analytic expressions. It was shown that antenna correlation is detrimental to secrecy performance when average SNR of the main channel is at medium and high level. Interestingly, when average SNR of the main channel reduces to low level, the effect of antenna correlation becomes benefi cial to secrecy performance.展开更多
文摘居民电子健康档案,英文全称electronic health records,简写EHR,是人们在相关健康活动中形成并保存下来备查的电子健康历史记录。它依托微机进行管理,是一种针对个人提供医疗保健服务,具有安全保密性的个人终身化医疗健康档案。EHR以居民的个体健康为中心,是一项通过将整个个体生命过程连接起来,记录各种健康因素,多渠道、动态化收集健康信息,以满足健康保健、健康管理及医疗诊断的信息资源。
文摘To investigate the impact of antenna correlation on secrecy performance in MIMO wiretap channels with Nakagami-m fading, the expressions of secrecy outage probability and positive secrecy probability were derived. Diversity order and array gain were also achieved for further insight. The study was based on the information theory that physical layer security can be guaranteed when the quality of the main channel is higher than that of the eavesdropper's channel. Monte Carlo simulations well validated the numerical results of analytic expressions. It was shown that antenna correlation is detrimental to secrecy performance when average SNR of the main channel is at medium and high level. Interestingly, when average SNR of the main channel reduces to low level, the effect of antenna correlation becomes benefi cial to secrecy performance.
