Answer the following Multiple-Choice Questions: 1) In Binary Phase Shift Keying system, the binary symbols 1 and 0 are represented by carrier with phase shift of 180 degree 90 degree 360 degree 0 degree 2) A group of two binary bits might be represented by one phase state. BPSK .MPSK a AM a ASK 3). requires the exact knowledge of the phase of the received signal. Encoding detection Noncoherent detection Coherent detection None of them 4) The number of possible signal in M-ary signalling is given by M and M= where n is an integer. n 2n 2n n2