Tse那本书68页的一个问题
12-16
如附件所示。
正交调制,为什么每符号时间,平均接收的能量是a^2/2呢?
信号的幅度是a,接收能量该是a^2啊?对应的SNR该是a^2/No啊?
请大侠指点指点迷津吧!谢谢了。
正交调制,为什么每符号时间,平均接收的能量是a^2/2呢?
信号的幅度是a,接收能量该是a^2啊?对应的SNR该是a^2/No啊?
请大侠指点指点迷津吧!谢谢了。
complex vs real
the average received energy per symbol time,
该是指对应一个complex symbol time里能量的平均吧!?难道特指real部分?
如果这样的话,SNR=real部分信号能量/complex部分的噪声?
i am wrong, i had thought about the ambiguity on the definition of noise energy...however, in this case, david says that "in a pair of time samples", so you should get only half energy on each time sample...
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