📡 ECE Labs

EC01 · Sem 4 · Signals & systemsSampling theorem and aliasingShow what happens when a signal is sampled below twice its frequency. EC02 · Sem 5 · Digital signal processingFFT spectrum of a multi-tone signalUse the FFT to find the frequencies hidden in a noisy signal. EC03 · Sem 5 · Digital signal processingWindow functions and spectral leakageCompare rectangular, Hann, Hamming and Blackman windows. EC04 · Sem 5 · Digital signal processingFIR low-pass filter design (windowed sinc)Design an FIR filter, see its response and filter a noisy signal. EC05 · Sem 5 · Digital signal processingIIR Butterworth filterDesign an IIR Butterworth filter with the bilinear transform and compare with FIR. EC06 · Sem 6 · Biomedical signal processingBiomedical signal filtering (synthetic ECG)Clean a noisy ECG-like waveform with a low-pass filter. EC07 · Sem 5 · Analog communicationAmplitude modulation (AM)Generate AM, see its sidebands and the effect of the modulation index. EC08 · Sem 5 · Analog communicationFrequency modulation (FM)Generate FM and estimate its bandwidth with Carson’s rule. EC09 · Sem 6 · Digital communicationBPSK over AWGN: BER vs Eb/N0Measure the bit error rate of BPSK by Monte Carlo and compare with theory. EC10 · Sem 6 · Digital communicationQPSK constellation and BERShow that QPSK carries 2 bits per symbol with the same BER as BPSK. EC11 · Sem 6 · Digital communication16-QAM and spectral efficiencyCompare 16-QAM with QPSK: more bits per symbol, but more noise sensitivity. EC12 · Sem 7 · Wireless communicationOFDM: subcarriers and cyclic prefixBuild one OFDM symbol and see its time-domain waveform. EC13 · Sem 6 · Antennas & propagationHalf-wave dipole radiation patternSee the 3D radiation pattern of a half-wave dipole and its directivity. EC14 · Sem 7 · Antennas & propagationUniform linear array and beam steeringNarrow and steer a beam electronically with an antenna array. EC15 · Sem 7 · Microwave engineeringMicrowave link budgetCalculate received power, SNR and capacity of a point-to-point link. EC16 · Sem 6 · Control systemsPID control of a DC motor positionTune a PID controller for a DC motor position loop. EC17 · Sem 6 · Control systemsPID speed controlHold a motor at constant speed against a load disturbance. EC18 · Sem 7 · Process controlTemperature control with dead timeControl an oven whose sensor responds after a delay. EC19 · Sem 7 · Process controlWater level control (non-linear plant)Control the level of a tank whose outflow depends on √level. EC20 · Sem 4 · Analog circuitsCE amplifier frequency responseFind the mid-band gain and the lower cut-off of a CE amplifier. EC21 · Sem 5 · Filter designActive band-pass filter (multiple feedback)Design a band-pass filter with one op-amp and measure its centre frequency. EC22 · Sem 5 · Digital signal processingSpectrum of a chirp (frequency sweep)See how a linear chirp spreads across the spectrum and on the waterfall.