Wireless Engineer Interview Questions
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Wireless Engineer interview questions shared by candidates
The interviewer focused on the wireless architectures for technical.
2 Answers↳
Reviewed before my scheduled interview about different wireless architecture.
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What do you mean about wireless architecture? Is it the 2G 3G 4G architectures?
You have access to two ports on the RF circuit of a mobile device, one port is at the antenna one at a 50 ohm resistor. Which port will you connect to test the circuit. why describe the advantage and disadvantage of each case.
2 Answers↳
We connect the testing circuit to the antenna. Resistor is the load
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We connect the testing circuit to the antenna. Resistor is the load
Several questions on statistics, signal processing, communications. Mostly fundamental knowledge, not specific to any standard. Example... need to build a Gaussian random number generator, but the chip only supports uniform distribution. How do I solve this?
2 Answersexplain OSI model
2 Answers↳
I drew the OSI model and explained each layer
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In these sorts of interviews you really need to drill down and understand what the interviewer is looking for. A good way to simulate a real interview experience is to do a mock with one of the Huawei Wireless Engineer experts on Prepfully, rated super strongly on TrustPilot... prepfully.com/practice-interviews Less
Issues on 2.4GHz for WiFi and other wireless protocols
2 Answers↳
Check on Channel, CCA, Dynamic Channel Selection algorithms
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2.4GHz is a shared band b/w WLAN, Bluetooth and Cellular. Coex and Antenna sharing is a challenge. CCA, Channel selection are part of WLAN protocol. They are effective in 5 GHz band as well. Less
qtns abt OFDM, qtns abt cyclic prefix, qtns abt wideband channel, qtns abt block convolution: overlap save
1 Answers↳
These qtns where to test the DSP, Communication Theory background.
When you get higher throughput: while going at 5mph and while going at 50 mph? And Why?
2 Answers↳
high mobility communication is more difficult.
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You will get higher a throughput while going at 5mph. Higher speeds indicates that the RF channel conditions such as delay and Doppler spread are changing at fast rate and its a fast fading channel. It is difficult to achieve equalization in such situation. Hence the modulation scheme can be shot down to, say QPSK(2 bits/symbol) from maybe 16QAM(4 bits/symbol) to provide a more robust transmission. This brings down the user throughput. Less
Why do you want to work at GTRI,.
1 Answers↳
I've learned it was the most proactive advanced technology company in the U.S.