Digital Communication

Digital Modulation Techniques digital communication, digital communication assignment,  digital communication assignment no 2,  digital communication assignments,  digital communication all assignments Q.1) Draw & explain euclidian distance and PSD of BPSK, M-ary PSK & 16-ary QAM. Q.2)Explain QPSK. Elaborate your answer with suitable expression, signal space& spectral representation. How QPSK signal is generated and received? What is the difference between OQPSK & QPSK? Q.3) Error occurs in DPSK in pair & in DEPSK error always occurs in single bit. Explain with suitable example. Q.4) Describe the scheme to recover the baseband signal in BPSK. With the help of block diagram and signals marked at input, output of these blocks. Also show that output of receiver is proportional to square root of power within the bit duration. Q.5) Sketch the Power Spectral density of BPSK signal and estimate the bandwidth where input data rate is 10Mbps a

Digital Communication digital communication, digital communication assignment,  digital communication assignment no 3,  digital communication assignments,  digital communication all assignments Q.1 )  A baseband receiver has received signal amplitude ± 2V held for a time T. The signal is corrupted by white Gaussian noise having Power Spectral density 10 –4   volt 2 /Hz. If the signal is processed by integrate and dump filter, what should be minimum Time T of the signal so that the error probability is not above 10 –4 . Q.2) Binary data is transmitted using PSK at a rate 2 Mbps over RF link having  bandwidth 2 MHz. Find signal power required at receiver input so that error  probability is less than or equal to 10 –4 . Assume noise PSD to be 10 –10 watt/Hz.  Q.3) Prove that “The performance of integrator and dump filter is identical to that  of the matched filter on the background of AWGN”. Calculate the probability  of error Pe. Q.4) A bipolar binary si