Simulink Tutorial on Digital Modulation Methods - Cengage Learning
Simulink Tutorial on Digital Modulation Methods - Cengage Learning Simulink Tutorial on Digital Modulation Methods - Cengage Learning
602 CHAPTER 13. SIMULINK TUTORIAL ON DIGITAL MODULATION Figure 13.40: Signal x(t) at matched filter input Figure 13.41: Demodulated baseband signal s_r(t) at matched filter output SOLUTION Figure 13.42: Sink signal v(t) 1. The zero ISI condition is met only at the transmitter because the cascade of two raised-cosine pulses (matched filter!) results in ISI if α �= 0. Also, the horizontal eye opening is not maximum. We would observe maximum horizontal eye opening at the transmitter for α = 1 (see
13.5. BINARY PHASE-SHIFT KEYING (BPSK) 603 Figure 13.43: Eye pattern at the transmitter for BPSK with raised-cosine pulses Figure 13.45: Transmitter scatter plot for BPSK with raised-cosine pulses Figure 13.44: Eye pattern at the receiver for BPSK with raised-cosine pulses Figure 13.46: Receiver scatter plot for BPSK with raised-cosine pulses 4. The envelope of u(t) is not constant anymore. Bandlimitation results in an additional amplitude modulation. Rectangular phase shift keying requires infinite bandwidth. Modulated signals with constant envelope always require infinite bandwidth. This applies, for example, to frequency-modulated signals. 5. The sink signal is delayed by the transmit and receive filter delays of 2 · 6T = 12T. The number of errors depends on the noise variance. © 2013 Cengage Learning. All Rights Reserved. May not be scanned, copied or duplicated, or posted to a publicly accessible website, in whole or in part.
- Page 1 and 2: Chapter 13 Simulink</strong
- Page 3 and 4: 13.2. SHORT INTRODUCTION TO SIMULIN
- Page 5 and 6: 13.2. SHORT INTRODUCTION TO SIMULIN
- Page 7 and 8: 13.2. SHORT INTRODUCTION TO SIMULIN
- Page 9 and 10: 13.4. PULSE SHAPING 581 Figure 13.1
- Page 11 and 12: 13.4. PULSE SHAPING 583 13.4.1 Theo
- Page 13 and 14: 13.4. PULSE SHAPING 585 Summation o
- Page 15 and 16: 13.4. PULSE SHAPING 587 For α = 0.
- Page 17 and 18: 13.4. PULSE SHAPING 589 Figure 13.1
- Page 19 and 20: 13.4. PULSE SHAPING 591 Figure 13.1
- Page 21 and 22: 13.5. BINARY PHASE-SHIFT KEYING (BP
- Page 23 and 24: 13.5. BINARY PHASE-SHIFT KEYING (BP
- Page 25 and 26: 13.5. BINARY PHASE-SHIFT KEYING (BP
- Page 27 and 28: 13.5. BINARY PHASE-SHIFT KEYING (BP
- Page 29: 13.5. BINARY PHASE-SHIFT KEYING (BP
- Page 33 and 34: 13.5. BINARY PHASE-SHIFT KEYING (BP
- Page 35 and 36: 13.6. QUADRATURE PHASE-SHIFT KEYING
- Page 37 and 38: 13.6. QUADRATURE PHASE-SHIFT KEYING
- Page 39 and 40: 13.6. QUADRATURE PHASE-SHIFT KEYING
- Page 41 and 42: 13.6. QUADRATURE PHASE-SHIFT KEYING
- Page 43 and 44: 13.7. OFFSET-QPSK 615 Figure 13.83:
- Page 45 and 46: 13.7. OFFSET-QPSK 617 3. How do the
- Page 47 and 48: 13.7. OFFSET-QPSK 619 Figure 13.98:
- Page 49 and 50: 13.8. MINIMUM SHIFT KEYING (MSK) 62
- Page 51 and 52: 13.8. MINIMUM SHIFT KEYING (MSK) 62
- Page 53 and 54: 13.9. 16-ARY QUADRATURE AMPLITUDE-S
- Page 55 and 56: 13.9. 16-ARY QUADRATURE AMPLITUDE-S
- Page 57 and 58: 13.9. 16-ARY QUADRATURE AMPLITUDE-S
- Page 59 and 60: 13.9. 16-ARY QUADRATURE AMPLITUDE-S
- Page 61: PROBLEMS 633 filter are limited in
13.5. BINARY PHASE-SHIFT KEYING (BPSK) 603<br />
Figure 13.43: Eye pattern at the transmitter<br />
for BPSK with raised-cosine<br />
pulses<br />
Figure 13.45: Transmitter scatter plot for<br />
BPSK with raised-cosine pulses<br />
Figure 13.44: Eye pattern at the receiver<br />
for BPSK with raised-cosine pulses<br />
Figure 13.46: Receiver scatter plot for<br />
BPSK with raised-cosine pulses<br />
4. The envelope of u(t) is not c<strong>on</strong>stant anymore. Bandlimitati<strong>on</strong> results in an additi<strong>on</strong>al<br />
amplitude modulati<strong>on</strong>. Rectangular phase shift keying requires infinite<br />
bandwidth. Modulated signals with c<strong>on</strong>stant envelope always require infinite<br />
bandwidth. This applies, for example, to frequency-modulated signals.<br />
5. The sink signal is delayed by the transmit and receive filter delays of 2 · 6T =<br />
12T. The number of errors depends <strong>on</strong> the noise variance.<br />
© 2013 <strong>Cengage</strong> <strong>Learning</strong>. All Rights Reserved. May not be scanned, copied or duplicated, or posted to a publicly accessible website, in whole or in part.
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