In written test- 1) Given QPSK constellation diagram, it has an I-Q imbalance.Q component has +0.5 dB imbalance in magnitude and I component has 0 degree phase imbalance.How will the resulting constellation look? 2) Given a frequency response if we apply kaiser window what are the output coefficients? In Interview- Few basic questions like what is correlation? mathematical formula? If there is frequency offset how will the constellation look like? Difference between correlation and convolution? etc
