The numbers in parentheses indicate the number of marked items (1 mark each). Labs A Pre-Lab report was only required for Lab 3. Lab 1 Report (4) - a reasonable plot of collected multipath data - histogram of measured data and a superimposed Rayleigh distribution - a reasonable plot of path loss vs distance (mean varies over time) - reasonable path loss exponent (i.e. between 1.5 and 6) [I marked the results correct if your estimated path loss exponent was within this range even though many (most?) students fit a line to a dB vs distance curve instead of dB vs log(distance).] Lab 2 Report (4) - GUI & spectrum analyzer captures (4) - answers (4) - adding two complex sinusoids - real spectrum has carrier and ... - period = ... and ... - aliasing Lab 3 Pre-Lab (1) - spreadsheet in a PDF file Lab 3 Report (5) - two flowgraphs - GUI screen capture of run-time window - spreadsheet - BER curves - calculation of coding gain Lab 4 Report (2) - C code - screen capture of terminal emulator output Lab 5 Report (3) - screen capture of GRC flowgraph - spectra for the 5 OFDM signals - reasonable explanations Lab 6 Report (4) - screen capture of GRC flowgraph - spectrum analyzer screeen capture - table of measurements with at least one value of OIP3 between 20 and 30 dBm - a comparison with manufacturer's specification Assignments Assignment 1 (18) Q1: 3% (1) Q2: rms=1.35us (1) Q3: 22+50=72 (2) Q4: (a) 10, 8.4, 11.5 dB (3) (b) 10; 6 or 10 (2) Q5: 1.3 km (1) Q6: (a) each 0.25 (1) (b) 4/9, 2/9, 1/9 (1) (c) 0.5, 0 (1) (d) (a,c); (a,b); (a) (3) Q7: MI=0.68 (1) code (1) Assignment 2 (8) Q1: (a) 6us (b) 60us (c) 64 Q2: (a) PAPR = 1 (b) N^2, N (2) (c) some reasonable code Q4: ~14 dB Assignment 3 (7) Q1:(a) - all NF correct (1.1, 3.9, 3.5) - all OP1 correct (15 (12?), 5.7, 27) (b) - total gain = 64dB - system NF = 1.3dB - system IIP3 ~= -31dBm Q2: OIP3=2.5dBm Q3: F=3.3 or 3.6 dB Mid-Term Exam One mark was assigned for each of the following essential elements of a correct solution: Question 1 (7) - use of Friis equation - correct wavelength - correct linear antenna gain - correct received power in dBm - not mixing up dB and dBm (1 mark) - correct received signal level (2 marks) Question 2 (4) - correct calculation of rho - correct probability - correct value of fm - correct calculation of Nr Part 2 Question 1 (4) - correct entropy - correct dmin - correct correctable & detectable errors - correct minimum-distance c/w Question 2 (3) - k = n-k = 2 - codewords * 1/2 mark each, or -1 if left out parity bits from codewords - correct P matrix Final Exam Q1 (6): - correct equation for path loss - correct calculation of wavelength - correct path loss & units (-1/2 for wrong sign) - uses Friis equation - correct unit conversions - correct answers Q2 (4): - correct calculation of fm - correct calculation of rho (or rho^2) - correct NR (1/2 for correct equation) - correct tau-bar (1/2 for correct equation) Q3 (5): - calculation of number of subcarriers - symbol duration without extension - symbol duration - symbol rate - bit rate Q4 (7): parity check matrix (3): - correct dimensions - correct transpose - correct I matrix codeword (4): - -2 for each incorect bit value (max deduction is -4) - -0.5 if computed codeword but gave data part as answer Q5 (3): - correct OIP3 in dBm (2 marks) - convert to Watts Q6 (3): - use correct cascade equation - convert noise figures to linear units - correct answer