First of all, he asked about the project you have done. Then he asked me two problems related to probability and static. One is to calculate the pdf of the random variable which is function of a set of iid random variables, the other is to derive the MAP for given random variable with specific distribution.
Questions about FFT, DFT, modulation, QAM, BER.
Describe the difference between coaxial line and microstrip line
1) Types of equalizers. Problems with zero-forcing equalizer. Why is MMSE equalizer better than the former? 2) Asked me about a wireless channel measurement project that I had done. Based on that, tested me on the concepts of coherence time, inter symbol interference, multipath fading. 3) Asked about basic concepts in OFDM. What problem does it solve? Can we keep increasing the number of subcarriers? Will there be any issues if we do that? 4) How many numbers can you represent by a unsigned and signed n-bit binary number.
Questions about matrices, covariance, FFTs.
Questions about DSP, Linear Algebra and modulation concepts.
What are the roles of the MSC, BSC, RNC in a telecom network ?
Basics: NF, Compression, IM3
You are given 2 receiver antennae and one transmitter antenna. Describe what happens to the received signal when changing the distance between receivers (close and far apart).
- Asked about my resume in details, every project every word - Asked about the knowledge of the company - Asked basic TCP UDP questions - Asked hidden/exposed terminal and RTS-CTS - Asked C and python basic (static variables, global, function, tuple value change) - Asked basic OS concepts and race conditions
Viewing 51 - 60 interview questions