M-Ary Flashcards
1
Q
What system functions on for a given BER less carrier power is needed when number of M level increases
A
MFSK
2
Q
For the same carrier power, higher number of M levels means higher BER.
A
M-PSK systems
3
Q
What is the bandwidth efficiency of MPSK signalling system?
A
BWE = log2(M)
4
Q
What systems eliminates the 180 degree change between two adjacent symbols?
A
OQPSK
5
Q
What system is a combination of MPSK and ASK?
A
QAM
6
Q
What system completely avoids any phase change?
A
MSK
7
Q
What system matches Non- Orthogonal signalling?
A
MPSK - BWE is improved but error performance pays price with increasing M
8
Q
What system matches Orthogonal signalling?
A
MFSK - Bandwidth sacrificed but error performance is improved with increasing M
