Lab-7: QPSK Modulation & Demodulation Quadrature phase shift keying (QPSK) modulated signal includes two independent and...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
Lab-7: QPSK Modulation & Demodulation Quadrature phase shift keying (QPSK) modulated signal includes two independent and orthogonal BPSK signals. The modulated signal can be written as: i,()= cos (@)t +*/4)= Cos a, - cos ot- sin @t 1 1,(1) = cos (@t+3x/4) =- V2 sin ot i,(1) = cos (@1+5n /4)=- cos o1+ TE V2 VE sin ot 1 i,(1) = cos (@t+7/4) =cos o1+sin ot %3D In QPSK, unlike BPSK, there are four different phase values, such as t/4, 3n/4, 5n/4, and 7n/4. Thus, M = 4 for QPSK. A. QPSK BandPass Modulated Signal Model: Construct the below block diagrams for QPSK signal modulator and demodulator, respectively. Serial- to Paralel block is not available in the library. The carrier frequency is 5 Hz and also T, duration is 1. Serial-to Paralel block divides bit stream into I and Q channels. Then I channel is multiplied with Cosine carrier and Q channel is multiplied with Sine carrier. Follow the steps below in order and answer the questions. juate Nmintion cwficem Lpote tipl Caverter KOPSH Sgnal Tahar Lpol t ary Cenverter Sera OPSK Ma Synal O chinel johane nd OPSK dala wwti Figure 1 QPSK Modulator Block Required Blocks 1. Benoulli Binary Generator 2. Sine Wave for carrier signal 3. Gain 4. Sum 5. Multiplier 6. Analog filter 7. Inequality 8. Scope 9. Unipolar to Bipolar converter 10. Switch 11. D-Latch Flip-Flop 12. Delay 13. Clock 2. In the right Scope, QPSK modulated signal is observed. Please make comments on the I channel, Q channel, and QPSK signal changes. Does the QPSK signal include both I & Q channel changes? Fill the table below. Time Interval 1-2sec 2-3 sec 3-4 sec 4-5 sec 5-6 sec 6-7 sec Phase changes on I channel Phase changes on Q channel Phase changes on QPSK signal Lab-7: QPSK Modulation & Demodulation Quadrature phase shift keying (QPSK) modulated signal includes two independent and orthogonal BPSK signals. The modulated signal can be written as: i,()= cos (@)t +*/4)= Cos a, - cos ot- sin @t 1 1,(1) = cos (@t+3x/4) =- V2 sin ot i,(1) = cos (@1+5n /4)=- cos o1+ TE V2 VE sin ot 1 i,(1) = cos (@t+7/4) =cos o1+sin ot %3D In QPSK, unlike BPSK, there are four different phase values, such as t/4, 3n/4, 5n/4, and 7n/4. Thus, M = 4 for QPSK. A. QPSK BandPass Modulated Signal Model: Construct the below block diagrams for QPSK signal modulator and demodulator, respectively. Serial- to Paralel block is not available in the library. The carrier frequency is 5 Hz and also T, duration is 1. Serial-to Paralel block divides bit stream into I and Q channels. Then I channel is multiplied with Cosine carrier and Q channel is multiplied with Sine carrier. Follow the steps below in order and answer the questions. juate Nmintion cwficem Lpote tipl Caverter KOPSH Sgnal Tahar Lpol t ary Cenverter Sera OPSK Ma Synal O chinel johane nd OPSK dala wwti Figure 1 QPSK Modulator Block Required Blocks 1. Benoulli Binary Generator 2. Sine Wave for carrier signal 3. Gain 4. Sum 5. Multiplier 6. Analog filter 7. Inequality 8. Scope 9. Unipolar to Bipolar converter 10. Switch 11. D-Latch Flip-Flop 12. Delay 13. Clock 2. In the right Scope, QPSK modulated signal is observed. Please make comments on the I channel, Q channel, and QPSK signal changes. Does the QPSK signal include both I & Q channel changes? Fill the table below. Time Interval 1-2sec 2-3 sec 3-4 sec 4-5 sec 5-6 sec 6-7 sec Phase changes on I channel Phase changes on Q channel Phase changes on QPSK signal
Expert Answer:
Answer rating: 100% (QA)
37T4 E sinco 4 To demodulate the QPSK signal we can recover the original BPSK signals by taking the ... View the full answer
Related Book For
Numerical Methods for Engineers
ISBN: 978-9352602131
7th edition
Authors: Steven C. Chapra, Raymond P. Canale
Posted Date:
Students also viewed these banking questions
-
The number 0.999c can be written as the sum of the terms of an infinite geometric sequence: 0.9 + 0.09 + 0.009 + . Here we have a 1 = 0.9 and r = 0.1. Use the formula for S to find this sum. Does...
-
Show that the solution of Can be written as Y = ebx (D1 cosh (b2 + c2 x + D2 sinh (b2 + c2 x) 0 dax 2
-
The interval (2, 5) can be written as the inequality _________.
-
Describe the relationship of the AD, SRAS, and LRAS curves when the economy is in long-run macroeconomic equilibrium.
-
On January 1, Year 1, Par Company purchased all the outstanding common shares of Bayshore Company, located in California, USA, for US$120,000. The carrying amount of Bayshores shareholders equity on...
-
A solution is made by dissolving 18.4 g of HCl in 662 mL of water. Calculate the pH of the solution. (Assume that the volume remains constant.)
-
The Object Adapter pattern has great potential for design. Provide examples.
-
Frankel Inc. experienced the following transactions for 2013, its first year of operations: 1. Issued common stock for $60,000 cash. 2. Purchased $210,000 of merchandise on account. 3. Sold...
-
What mechanisms can be implemented to ensure accountability and mitigate the risks associated with delegation, such as delegation without proper oversight or the delegation of inappropriate tasks ?
-
1. Given the facts of the case, what communications do you believe Forrester & Loomis should have made with the audit committee with regard to the transactions with the vendor to comply with PCAOB AS...
-
Another popular product manufactured by this company, PBird, has the following product structure tree: PBird R (3) S (1) T (2) U (4) V (2) T (3) U (2) The inventory record file presents the following...
-
Is the IRR method always accurate? 12) Why do managers use the net present value (NPV) method? 13) In-a-Jiff Tire Service owner, Jeffery Haberton, has the opportunity to invest $360,000 at 8%...
-
There are various known branches of psychology. List these major branches of psychology.?
-
1)What makes psychology a science? 2) Do you agree with Stanovich that psychology is "alive and well" among the sciences? Why or why not? Stanovich: how to think straight about psychology
-
Identify and explain features in the primary offender that are consistent with Cluster A personalities. Jim, a 48-year-old engineer, works at a medium-size engineering firm. He has been employed with...
-
Choose ONE out of the four schools of thought in Psychology listed below which seems interesting to you and state why: Psychoanalysis Behaviorism Cognitive Psychology or Cognitivism Humanistic...
-
What has happened to the common areas in the U . . S . , . , such as rangeland, forests and fisheries? Group of answer choices They have been completely degraded as predicted by tragedy of the...
-
Record the following selected transactions for March in a two-column journal, identifying each entry by letter: (a) Received $10,000 from Shirley Knowles, owner. (b) Purchased equipment for $35,000,...
-
Given a square matrix [A], write a single line MATLAB command that will create a new matrix [Aug] that consists of the original matrix [A] augmented by an identity matrix [I]?
-
Use MATLAB or Mathcad to develop a contour plot with flux arrows for the Excel solution from Prob. 31.7. 2 75.0 89.2 95.899.1 99.796.689.977.6 50.0 3 75.0 86.2 94.7100.9 103. 96.7 85.5 70.3 50.0 4...
-
The velocity is equal to the rate of change of distance x (m), (a) Substitute Eq. (1.10) and develop an analytical solution for distance as a function of time. Assume that x(0) = 0. (b) Use Euler's...
-
Under IFRS, income statements are required to show: A. Extraordinary items. B. Unusual items. C. Exceptional items. D. None of the above.
-
Set out in Figure 16.10 are summarized balance sheets and income statements for F Co. for 20X1 and 20X2. You are required to: Figure 16.10 a. prepare a table of ratios, covering all aspects of...
-
Earnings is calculated deducting: A. Dividends on ordinary shares. B. Dividends on preference shares. C. Tax expense. D. Interest expense.
Study smarter with the SolutionInn App