_____, the train started.
A: The signal given
B: Giving the signal
C: The signal being given
D: The signal giving
A: The signal given
B: Giving the signal
C: The signal being given
D: The signal giving
举一反三
- ________, the train started. A: The signal given B: After the signal was given C: Given the signal D: A and B
- A ________may be given ____means of flags, lights, and guns. A: sign; by B: signal; in C: signal; by D: sign; in
- For a given signal constellation, the average probability of symbol error incurred in maximum likelihood signal detection over an AWGN channel is invariant to the _________________ of the signal constellation. A: compression B: translation C: expansion D: rotation
- 2. Railway signals can be divided into home signal, starting signal, distant signal, repeating signal and shunting signal.
- what is an analog signal? A: Analog signal is a continous values B: Analog signal is a discrete values C: Analog signal is sometimes continous,sometimes discrete