When the number of bits in a PCM mode, n, is 3, what is the dynamic range in dB?
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When the number of bits in a PCM mode, n, is 3, what is the dynamic range in dB?
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- Determine the number of bits per level required when using FSK with 4 different frequencies and QAM with a constellation of 256 points.The bit rate of a digital communication system is R kbit/s and the modulation used is 32-QAM. What will be the minimum bandwidth required for ISI free transmission?A data of 240 kbps is to be transmitted over a channel of 5 kHz bandwidth. The transmission should be free from the ISI problem. What should be the minimum value of the SNR (in dB unit) if the channel is noisy?
- A CDMA system delivers message to N = 40 users with equal power. The message is transmitted at a rate of 10 kbps, using a DS spread spectrum signal operating at a chip rate of 2MHz. a. What is a bit period?b. What is a chip period?c. What is the processing gain of the system?Exxplain the rellation between BER and E/N_0, where E is the energy per bit,N_0 is the noise spectral density, BER is the bit error rate. What is the reason for usign channel coding?What is the probability of error with a PSK system with a bit rate of 20kpbs, BW of 50 kHz, Noise power of 10-13 W, Carrier Power of 3.3-14 Joules?
- The clock select register for channel A in an MC68681 DUART has bits 0 through 3 set to 0, 0, 0, and 1, respectively. What is the baud rate of the transmitter? What is the bit-‐‑time (or duration) for each bit transmitted?20.b. How many OC signals are combined into a 40 Gbps SONET network?A. 192B. 256C. 768D. 516,096What is the value of RC for an 8-bit single-ramp ADC with VFS = 5.12 V, VR = 2.000 V, and fC = 1 MHz?
- Fora standard SSBSC carrier AM, the peak unmodulated carrier peak voltage is 10 V for a load resistance of 10 ohms and modulation index of 1. What will be the total transmitted power?Assume the channel bandwidth is 3100 Hz and the maximum data rate is 35 kb/s. To improve the maximum data rate by 60%, how many times should the signal-to-noise-rate (SNR) increase? Based on the improved maximum data rate and SNR, if the SNR further increases by 10 times, can the maximum data rate further increase by 20%?A. If the probability of error of BPSK is 0.85 then Pe of BFSK is? B. What happens to the radio wave propagation when the rouefractive index of ionospheric layer becomes low or high? C. If the number of quantization levels are multiplied by four time them how many numbers of bits are added to the actual number? D. What is the disadvantage of wave tilt? E. What is a bipolar line coding technique with phase encoding, and explain why it is named as phase encoding method? F. What is oblique communication circuit? G. What are the differences between DPCM and Delta Modulation? H. What is the change in bandwidth when channel capacity is doubled and two number of bits are increased?