Quiz5

Plz complete solution or leave it hanging.

Explain frequency hopping acquisition scheme using a simple PN sequence. Assume that the length of PN sequence is 15 and the number of frequency hopping levels is 8

Answer the following: 1. In AM-DSB-LC, describe the possible values of the modulation index. Which is the best for the envelop detection? OUT Ter TFLAXY 2. Draw the diagram of the FDM. 3. List and explain two different sources for electrical noise in a communication system? .243 0.25

Select the correct statement regarding transmission systems. a. only unguided systems need to worry about EM noise since most guided system use signal balancing or shielding b. signal attenuation is independent of the baseband or carrier frequency c. the type of modulation method selected will influence digital data capacity d. all statements are correct

(5) If in a communication system BPSK, QPSK, QASK-8 are used for transmission and reception of digital data. (a) Determine the bandwidth B for each modulation scheme for a bit rate of 2kbps (b) Determine the symbol distance for each modulation scheme providing its complex plain presentation in terms of bit energy Es (c) Determine the number of symbol and the symbol rate for each modulation.

If in a communication system BPSK, QPSK, QASK-8 are used for transmission and reception of digital data. (a) Determine the bandwidth B for each modulation scheme for a bit rate of 2kbps (b) Determine the symbol distance for each modulation scheme providing its complex plain presentation in terms of bit energy E (c) Determine the number of symbol and the symbol rate for each modulation.

Help with this please.

Looking at the block diagram of the digital modulator shown in the image added and assuming the input bit duration to be 3 times longer than the sine wave period, sketch how the signal at the output looks like for the 1010 unipolar binary modulating signal (the input bit stream). What is the name of this particular type of modulation? Draw its constellation diagram.       Then state one disadvantage of the modulation scheme in part a with respect to the receiver deciding when the transmitted message starts and ends.

01: (A): What are the functional elements of the communication system, draw the block diagram and explain each sub-block. 01: (B): Calculate the power in one of the side band in SSB-SC modulation when the carrier power is 124W and there is 80% modulation depth in the amplitude modulated signal?

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