1.算法描述 MIMO-OFDM的信道估计：时，频，空三个域都要考虑，尤其是在空域，不同天线发射的导频序列需要相互正交，否则在接收端无法区分各个导频，造成导频污染，就无法正确地估计信道。正交的方法有很多，可以是时间上错开，在某个时间只允许某个天线发送。也可以在频率上错开。还可以让导频信号本身就是正交...

Linux中的pstree 查看进程树、netstat 显示网络状态和端口占用信息、kill 终止进程、进程管理类、ps 查看当前系统进程状态、内存置换算法LRU、查看与sshd相关进程

1.10 进程管理类一般守护进程是以d结尾的在Centos7里面服务在/usr/lib/systemd/system里面利用管道筛选以d.service结尾的服务这些基本上都是守护进程了进程是正在执行的一个程序或命令，每一个进程都是一个运行的实体，都有自己的地址空间，并占用一定的系统资源。1.10...

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更新时间 2024-03-08 14:16:15

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