Why we need synchronization bits in ?TDM To decrease bandwidth To decrease system complexity To decrease the noise To decrease power
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- Q/ Represents the PCM code [10001100101] in1- Alternate Mark Inversion(AMI)2- Split-phase(Manchester)3- Return to Zero(RZ)4- Non-Return to Zero-L(NRZ-L)5- Delay Modulation (Miller Code)State modulation of signals, and distinguish different modulation techniques, thereonidentify which technique is more suitable for communication network and explain how signals are transmitted and received practicallyQuestion 3: What are the similarities and differences between the information signal m (t) obtained as a result of demodulation and the original information signal m (t) on the modulation side?
- Q24)This multiple choice question from DIGITAL COMMUNICATIONS course.just write for me the final answer. The choice of the number of bits per PCM word depends on the a. SNR b. Bandwidth c. None of the mentioned d. SNR and bandwidthSelect 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 correctWrite short notes (max. three lines) on each of the following:(a) The effect of Quantization error on PCM signal spectrum and transmission rate.(b) The Transmitter Mixer.(c) Manchester codes (what/why/advantage(s)/disadvantage(s))
- Modulation index is called elasticity of modulation when it is expressed as a percentage. True FalseWhat are the similarities and differences between the information signal m (t) obtained as a result of demodulation and the original information signal m (t) on the modulation side? (first one is original signal)Answer the Question with the “arrow” sign based on the “bit error rate” questions. Don’t answer the bit error rate assignment only the channel capacity
- The A.M transmission is used for long distance and video communication instead of F.M. Why? Also analyze the effect of noise and environmental conditions (i.e.moister, temperature and geographical terrain) on both modulation schemes and elaborate which modulation schemes will be more effect by noise and environmental conditions? (your answer should be technical and to the point). Subject is Communication systemc) iii) We need to send 210,000 bits per second over a noiseless channel using 128- QAM. Determine the required bandwidth.q6- Consider an Orthogonal frequency-division multiplexing data transmission mode of bandwidth 60 KHz with a cyclic prefix of 33 samples. There are 120 carriers used for data transmission, the outer 30 carriers are used for reducing adjacent channel interference, and 10 carriers are the pilot symbols. Calculate the symbol time for the raw OFDM in (milli second) Select one option: a. 5 b. 3 c. 1 d. 2