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A bit error probability of PB-10-3 is required for a system with a data rate of...
Question 4 (a) A 3,000 bit/second data terminal is connected to a modem with 25% raised-cosine...
Question 4 (a) A 3,000 bit/second data terminal is connected to a modem with 25% raised-cosine roll-off pulse shaping is used. Calculate the transmission bandwidth Bt required at the modem output for each of the following schemes: (0) Binary amplitude-shift keying (ASK) transmission. [2 marks] (ii) Binary frequency-shift keying (FSK) transmission with a frequency deviation of +2,400 Hz around the carrier. [2 marks] (iii) 16-level quadrature amplitude modulation (QAM). [2 marks] (b) FSK transmission is used to transmit 750 bps...
Binary data is to be transmitted using M-ary PAM over the ideal bandlimited passband channel with...
Binary data is to be transmitted using M-ary PAM over the ideal bandlimited passband channel with a bandwidth of B- 4 kHz. We use Raised Cosine (RC) pulses with roll- off factor γ 0.5 so that there is no ISI. If we want to achive a bit rate of 56 kbps, determine the required size of the signal set M, and the symbol rate.
QiFiber optic cable typically exhibits a probability of bit error of Pb- 10. A form of...
QiFiber optic cable typically exhibits a probability of bit error of Pb- 10. A form of wireless modulation, DPSK, has Pb-1/2ỹ in some s the av- erage SNR. Find the average SNR required to achieve the same Pb in the wireless channel as in the fiber optic cable. Because of this extremely high required SNR, wireless channels typically have P, much larger than 10-12. wireless channels, where ), i Also find the average SNR required in decibels.
Compare QAM and ASK in terms of its error performance and data rate. (4Marks) b. binary
Compare QAM and ASK in terms of its error performance and data rate. (4Marks) b. binary data is transmitted over a channel at a rate of f0 bits/sec. To reduce the transmission bandwidth, it is decided to transmit this data using 16-ary symbol. By what factor is the bandwidth reduced? (2Marks) What will be the increase in the transmitted power when the separation between pulse amplitude is same in both cases. Calculate the difference in maximum power level between ASK...
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 bit rate for a baseband signal is 1.544 Mb/s, and FEC at a code rate...
The bit rate for a baseband signal is 1.544 Mb/s, and FEC at a code rate of 7/8 is applied before the signal is used to modulate the carrier. Given that the system uses raisedcosine filtering with a rolloff factor of 0.2, determine the bandwidth required for: (a) BPSK, and (b) QPSK. Explain what is meant by coding gain as applied to error correcting coding. When FEC coding is used on a digital link, a coding gain of 3 dB...
2. a. Find Eb/No and Amplitude A required to give Pb 10-5 for the following coherent digital modu...
2. a. Find Eb/No and Amplitude A required to give Pb 10-5 for the following coherent digital modulation schemes if No-10-5 and time is 0.5msec i. On-Off keying (ASK), ii. BPSK, iii. BFSK and v. BPSK with a phase error of 5 deg. Consider an audio signal with spectral components limited to the frequency band 300 to 3300 Hz. Assume that the sampling rate of 8000 samples/s will be used to generate a PCM signal. The ratio of peak signal...
A thermal-noise-limited PCM system must operate with an error probability better than 10^-9. The load resistance is 50 ohms and the temperature is 300 K. The data rate is 500 Mb/s (NRZ), the wavelengt...
A thermal-noise-limited PCM system must operate with an error probability better than 10^-9. The load resistance is 50 ohms and the temperature is 300 K. The data rate is 500 Mb/s (NRZ), the wavelength is 1.3 um, and the photodetector's quantum efficiency is 0.9. a. what is the required minimum SNR? b. How much optic power must reach the receiver? c. compute the number of incident photons per bit (that is, the number of photons when a binary 1 is...
Question 4 (a) A 3,000 bit/second data terminal is connected to a modem with 25% raised-cosine roll-off pulse shaping is used. Calculate the transmission bandwidth Bt required at the modem output for each of the following schemes: (0) Binary amplitude-shift keying (ASK) transmission. [2 marks] (ii) Binary frequency-shift keying (FSK) transmission with a frequency deviation of +2,400 Hz around the carrier. [2 marks] (iii) 16-level quadrature amplitude modulation (QAM). [2 marks] (b) FSK transmission is used to transmit 750 bps...
Binary data is to be transmitted using M-ary PAM over the ideal bandlimited passband channel with a bandwidth of B- 4 kHz. We use Raised Cosine (RC) pulses with roll- off factor γ 0.5 so that there is no ISI. If we want to achive a bit rate of 56 kbps, determine the required size of the signal set M, and the symbol rate.
QiFiber optic cable typically exhibits a probability of bit error of Pb- 10. A form of wireless modulation, DPSK, has Pb-1/2ỹ in some s the av- erage SNR. Find the average SNR required to achieve the same Pb in the wireless channel as in the fiber optic cable. Because of this extremely high required SNR, wireless channels typically have P, much larger than 10-12. wireless channels, where ), i Also find the average SNR required in decibels.
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...
2. a. Find Eb/No and Amplitude A required to give Pb 10-5 for the following coherent digital modulation schemes if No-10-5 and time is 0.5msec i. On-Off keying (ASK), ii. BPSK, iii. BFSK and v. BPSK with a phase error of 5 deg. Consider an audio signal with spectral components limited to the frequency band 300 to 3300 Hz. Assume that the sampling rate of 8000 samples/s will be used to generate a PCM signal. The ratio of peak signal...
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