lab3_digital_modulation

lab3_digital_modulation - Massachusetts Institute of...

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6.02 Spring 2008 1 of 29 Lab #3 Massachusetts Institute of Technology Dept. of Electrical Engineering and Computer Science Spring Semester, 2008 6.02 Introduction to EECS 2 Lab #3: Digital Modulation Goal:. .................................................................................................................................... 2 Instructions:. ......................................................................................................................... 2 PreLab:. ................................................................................................................................ 3 A. Sigma-Delta Encoding. ............................................................................................... 4 B. Upsampling and Interpolation for Data Transmission. ............................................... 7 C. Eye Diagrams and Constellation Diagrams . ............................................................. 11 1. Eye Diagrams. ........................................................................................................ 12 2. Constellation Diagrams. ......................................................................................... 16 Lab Exercises (9am-noon and 2pm – 5pm, Wed., March 5, 2008):. ................................. 20 A. Viewing the Received Spectrum. .............................................................................. 20 B. “Building” the Analog Receiver . .............................................................................. 22 C. “Building” the Digital Receiver. ............................................................................... 24 Check-off for Lab 3 . .......................................................................................................... 28 Example Interview Questions. .......................................................................................... 29
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6.02 Spring 2008 2 of 29 Lab #3 Goal: Basic understanding of digital modulation concepts and associated characterization methods (such as eye diagrams and constellation diagrams). The use of Sigma-Delta techniques to achieve a 2-bit/symbol data stream from a 16-bit input data stream will also be included in the exercises. Instructions: 1. Be sure to complete the Prelab in its entirety before lab on Wednesday, March 5. Please turn in requested answers to the prelab questions at the beginning of the lab session. You will need the knowledge gained from the Prelab to do the Lab exercises. 2. Complete the activities for Wednesday’s lab (see below) and get checked off by one of the TAs. Please work in pairs while in lab. 3. Prepare for the post-lab interview from the staff by studying the sample interview questions.
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6.02 Spring 2008 3 of 29 Lab #3 PreLab: Lab 3 will focus on receiving digitally modulated data sent wirelessly from a separate transmitter to your USRP board, and then recovering the information by using various Matlab functions. In this Prelab, we will examine several operations that are used to
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lab3_digital_modulation - Massachusetts Institute of...

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