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II. Problem Solving: 1. For a QPSK system and the given parameters, determine a. Carrier power...
a) What is the value in dB of the free-space loss for a carrier frequency of...
a) What is the value in dB of the free-space loss for a carrier frequency of 900 MHz and a range of 10 km? (b) The effective isotropic radiated power (EIRP) is 1 W. Assume that both the transmitting and receiving antennas are isotropic and that there are no other losses. The noise N0 = N/W = κTo is −174 dBm/Hz. The EIRP is 1 W. The bandwidth is 20 MHz and the bit rate per Hz of bandwidth is...
Problem #2: (40 points) Consider the following communication link. Both the transmitter and receivers are properly...
Problem #2: (40 points) Consider the following communication link. Both the transmitter and receivers are properly matched to their respective antennas. Assume that the system nominal temperature is 290 K. A detailed block diagram of the receiver is shown in the figure Determine 1. The effective isotropic radiated power in dBm. 2. The space loss in dB 3. The communication link total losses in dB 4. What would be the received power at the receiver input in dBm? 5. What's...
Suppose a digital communication system uses a transmission power of 250 mW and a carrier frequency...
Suppose a digital communication system uses a transmission power of 250 mW and a carrier frequency of 10,665,000 Hz. The system has a transmission range of 10 m. Assume that the thermal noise power at the receiver is 25 μW, do-1 m-Y-2. Answer the following: a. What is the received signal power? Express your result in Watts and in dBm b. What is the SNR at the receiver's antenna? Express your result in dB. Using the BER curve of Receiver...
Problem 6 a) State two approaches of avoiding collision in a carrier sense multiple access with...
Problem 6 a) State two approaches of avoiding collision in a carrier sense multiple access with collision avoidance based network. Give two reasons why collisions cannot be eliminated in a network whose nodes perform carrier sensing prior to transmitting a packet b) For the slotted ALOHA protocol used on the random access channel in cellular systems, show that the theoretical maximum throughput, Smax = '36%. Hint: For slotted ALOHA, the throughput S is given by: S=Ge-, where G is the...
A communication system operates in the presence of white noise with a two-sided power spectral density...
A communication system operates in the presence of white noise with a two-sided power spectral density Sn(w)=10^-14 W/Hz and with a path loss of 20 dB. Calculate the minimum required bandwidth and the minimum required power of the transmitter for a 10 kHz sinusoidal input and a 40 dB output signal to noise ratio if the modulation is a) DSB-SC b) SSB-SC c) FM with Af = 10 kHz
5. Basic Problem. We need to determine the transmitter power for a broadcasting system given the...
5. Basic Problem. We need to determine the transmitter power for a broadcasting system given the following information: . The message has 8 kHz bandwidth and normalized power of 0.5. . The systems uses a channel with 60 kHz bandwidth and attenuation of 40 dB. The power spectral density N10-12 W/Hz. pre-emphasis/de-emphasis is used. » A frequency modulation scheme is to be used. For simplicity, assume no (a) Determine the minimum transmitter power that will achieve a 40 dB SNR...
Q1. A DSB-SC signal is transmitted over a noisy channel with power spectral density of noise...
Q1. A DSB-SC signal is transmitted over a noisy channel with power spectral density of noise given as, 0, otherwise with B-200 kHz and N 10W Hz. The message bandwidth is 10 kHz and its average power is 10 W. Assume A,-1, 100kHz, and the channel attenuates signal power by a factor of 1000 (-30 dB). Assume that a suitable band-pass filter is used at the receiver to limit out-of-band noise. (a) Determine the average signal power at the receiver...
Q2 Fig.2 is a simplified diagram of a WCDMA system downlink signalling 20 construction, in which different channel...
Q2 Fig.2 is a simplified diagram of a WCDMA system downlink signalling 20 construction, in which different channelization code CensF are used to PAPER CODE: EEE326/17-18/S2/ exam Page 2 of 6 separate different physical channels in downlink whilst the scrambling code Sa is used to differentiate the BSs. Each physical channel is assigned to different user with a gain factor Gi. Assume QPSK modulation is employed for digital transmission and the spectrum is 3.84 MHz. One user has a data...
The following is the channel frequency assignment for a 12-channel AM radio system: (c) Channel No Fcy 1240 kHz 1370 kHz 500 kHz 1630 kHz Channel No.Frequency 2280 kHz 2410 kHz 2540 kHz 2670 kHz Chan...
The following is the channel frequency assignment for a 12-channel AM radio system: (c) Channel No Fcy 1240 kHz 1370 kHz 500 kHz 1630 kHz Channel No.Frequency 2280 kHz 2410 kHz 2540 kHz 2670 kHz Channel No. Freqency 1760 kHz 1890 kHz 2020 kHz 2150 kHz 10 2 12 When the AM superheterodyne radio receiver is tuned to Channel 10, in addition to the signal carried on Channel 10, you can also hear a weak signal carried on Channel3 (i)...
Problem #2: (40 points) Consider the following communication link. Both the transmitter and receivers are properly matched to their respective antennas. Assume that the system nominal temperature is 290 K. A detailed block diagram of the receiver is shown in the figure Determine 1. The effective isotropic radiated power in dBm. 2. The space loss in dB 3. The communication link total losses in dB 4. What would be the received power at the receiver input in dBm? 5. What's...
Suppose a digital communication system uses a transmission power of 250 mW and a carrier frequency of 10,665,000 Hz. The system has a transmission range of 10 m. Assume that the thermal noise power at the receiver is 25 μW, do-1 m-Y-2. Answer the following: a. What is the received signal power? Express your result in Watts and in dBm b. What is the SNR at the receiver's antenna? Express your result in dB. Using the BER curve of Receiver...
Problem 6 a) State two approaches of avoiding collision in a carrier sense multiple access with collision avoidance based network. Give two reasons why collisions cannot be eliminated in a network whose nodes perform carrier sensing prior to transmitting a packet b) For the slotted ALOHA protocol used on the random access channel in cellular systems, show that the theoretical maximum throughput, Smax = '36%. Hint: For slotted ALOHA, the throughput S is given by: S=Ge-, where G is the...
A communication system operates in the presence of white noise with a two-sided power spectral density Sn(w)=10^-14 W/Hz and with a path loss of 20 dB. Calculate the minimum required bandwidth and the minimum required power of the transmitter for a 10 kHz sinusoidal input and a 40 dB output signal to noise ratio if the modulation is a) DSB-SC b) SSB-SC c) FM with Af = 10 kHz
5. Basic Problem. We need to determine the transmitter power for a broadcasting system given the following information: . The message has 8 kHz bandwidth and normalized power of 0.5. . The systems uses a channel with 60 kHz bandwidth and attenuation of 40 dB. The power spectral density N10-12 W/Hz. pre-emphasis/de-emphasis is used. » A frequency modulation scheme is to be used. For simplicity, assume no (a) Determine the minimum transmitter power that will achieve a 40 dB SNR...
Q1. A DSB-SC signal is transmitted over a noisy channel with power spectral density of noise given as, 0, otherwise with B-200 kHz and N 10W Hz. The message bandwidth is 10 kHz and its average power is 10 W. Assume A,-1, 100kHz, and the channel attenuates signal power by a factor of 1000 (-30 dB). Assume that a suitable band-pass filter is used at the receiver to limit out-of-band noise. (a) Determine the average signal power at the receiver...
Q2 Fig.2 is a simplified diagram of a WCDMA system downlink signalling 20 construction, in which different channelization code CensF are used to PAPER CODE: EEE326/17-18/S2/ exam Page 2 of 6 separate different physical channels in downlink whilst the scrambling code Sa is used to differentiate the BSs. Each physical channel is assigned to different user with a gain factor Gi. Assume QPSK modulation is employed for digital transmission and the spectrum is 3.84 MHz. One user has a data...
The following is the channel frequency assignment for a 12-channel AM radio system: (c) Channel No Fcy 1240 kHz 1370 kHz 500 kHz 1630 kHz Channel No.Frequency 2280 kHz 2410 kHz 2540 kHz 2670 kHz Channel No. Freqency 1760 kHz 1890 kHz 2020 kHz 2150 kHz 10 2 12 When the AM superheterodyne radio receiver is tuned to Channel 10, in addition to the signal carried on Channel 10, you can also hear a weak signal carried on Channel3 (i)...
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