10+ Ericsson RF Engineer Interview Questions & Answers | Complete Prep Guide 2025

Ericsson RF Engineer Interview Experiences

6 interviews found

RF Engineer Interview Questions & Answers

Anonymous

posted on 30 Sep 2024

Interview experience

Excellent

Difficulty level

Process Duration

Result

Round 1 - Technical

(2 Questions)

Q1. Parameter & Lte question

Add your answer

Q2. RF KPI & Drop Call

Add your answer

RF Engineer Interview Questions & Answers

Anonymous

posted on 6 Jul 2024

Interview experience

Average

Difficulty level

Process Duration

Result

Round 1 - Technical

(2 Questions)

Q1. What is NR Technology?

Ans.

NR Technology stands for New Radio Technology, which is the global standard for a unified, more capable 5G wireless air interface.

NR Technology is the foundation of 5G wireless communication systems.
It provides higher data rates, lower latency, and increased reliability compared to previous generations.
NR Technology operates in both sub-6 GHz and mmWave frequency bands.
It enables new use cases such as IoT, smart cities

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Q2. What is difference between coupler and tapper?

Ans.

A coupler is a device used to split or combine RF signals, while a tapper is used to attenuate a portion of the signal.

Coupler splits or combines RF signals, while tapper attenuates a portion of the signal
Coupler has multiple ports for signal input/output, tapper typically has one input and two outputs
Coupler has a fixed coupling ratio, tapper allows for adjustable attenuation levels

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RF Engineer Interview Questions & Answers

Kaushal Kumar Singh

posted on 26 May 2024

Interview experience

Excellent

Difficulty level

Process Duration

Result

Round 1 - Technical

(1 Question)

Q1. LTE call flow and kpi

Add your answer

RF Engineer Interview Questions & Answers

sushil

posted on 5 Feb 2023

Interview experience

Excellent

Difficulty level

Moderate

Process Duration

2-4 weeks

Result

Selected

I applied via Referral and was interviewed in Aug 2022. There were 4 interview rounds.

Round 1 - Resume Shortlist

Pro Tip by AmbitionBox:

Don’t add your photo or details such as gender, age, and address in your resume. These details do not add any value.

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Round 2 - Aptitude Test

Aptitude test of 1 hour, 3 sections, sectional cut off, aptitude test, resoning, English

Round 3 - Technical

(3 Questions)

Q1. Technical questions regarding LTE and 5G Kpi Optimization

Add your answer

Q2. HOW YOU MITIGATE UL RSSI IN TDD ,DUCTING EFFECT ,TOOLS ON WHICH I AM WORKING

Ans. FRAME STRUCTURE CHANGE SSF7 TO SSF5 AND Aggressive TILTING OF AGRRESOR WILL HELP

Answered by sushil

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Q3. HOW YOU CAN IMPROVE CQI

Ans.

CQI can be improved by optimizing modulation schemes, increasing bandwidth, and reducing interference.

Optimize modulation schemes to increase data throughput
Increase bandwidth to allow for more data transmission
Reduce interference by using advanced signal processing techniques
Implement MIMO technology to improve signal quality
Use adaptive modulation and coding to adjust to changing channel conditions

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Round 4 - HR

(1 Question)

Q1. What is my Salary expectations

Ans.

My salary expectations for the RF Engineer position are competitive and commensurate with my experience and qualifications.

Research the average salary range for RF Engineers in your location and industry.
Consider your level of experience, education, and any specialized skills or certifications.
Factor in the company's size, reputation, and benefits package.
Be prepared to negotiate and discuss your salary expectations du...

Answered by AI

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Interview Preparation Tips

Interview preparation tips for other job seekers - Don't waste your time to solve a single question, as sectional cut off there

RF Engineer Interview Questions & Answers

Anonymous

posted on 12 Aug 2022

I applied via Recruitment Consulltant and was interviewed in Jul 2022. There were 2 interview rounds.

Round 1 - Resume Shortlist

Pro Tip by AmbitionBox:

Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.

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Round 2 - HR

(3 Questions)

Q1. All things considered about me

Add your answer

Q2. Take all information about my job responsibilities

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Q3. Take all information my carrier

Add your answer

Interview Preparation Tips

Interview preparation tips for other job seekers - All be prepared for your carrier challenges

RF Engineer Interview Questions & Answers

Anonymous

posted on 11 Dec 2020

Interview Questionnaire

2 Questions

Q1. Wahi is the 4G parameters in kpi.

Ans.

4G parameters in KPI are key performance indicators that measure the performance of a 4G network.

4G parameters in KPI include metrics such as signal strength, signal quality, throughput, latency, and handover success rate.
These parameters help assess the overall performance and quality of a 4G network.
For example, signal strength is measured in dBm and indicates the power level of the received signal.
Throughput measure...

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Q2. What is SINR.

Ans.

SINR stands for Signal-to-Interference-plus-Noise Ratio, a measure of signal quality in wireless communication.

SINR is a ratio of the desired signal power to the interference and noise power.
It is used to evaluate the quality of a wireless signal in a given environment.
Higher SINR values indicate better signal quality and stronger signal-to-noise ratio.
SINR is commonly used in cellular networks to optimize network perf

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chirpingstarfruit

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RF Engineer Interview Questions & Answers

Nokia

Anonymous

posted on 19 Sep 2020

Interview Questionnaire

12 Questions

Q1. LTE Architecture

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Q2. Interface between LTE

Ans.

Interface between LTE refers to the connection between the LTE network and other networks or devices.

LTE interfaces with other cellular networks such as 3G and 2G through inter-RAT handover
LTE also interfaces with non-cellular networks such as Wi-Fi and Ethernet through evolved packet core (EPC)
LTE devices interface with the LTE network through the air interface using radio frequency signals
LTE also interfaces with cor...

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Q3. What is X2 interface

Ans.

X2 interface is a communication interface between two eNodeBs in LTE network.

X2 interface is used for inter-cell handover and load balancing.
It is a point-to-point interface that connects two eNodeBs.
X2 interface is used for exchanging control and user plane data between eNodeBs.
It is a critical interface for LTE network performance and reliability.
X2 interface supports various protocols such as S1AP, GTP, and RANAP.

Answered by AI

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Q4. Channels of LTE

Ans.

LTE has 20 MHz bandwidth divided into 100 resource blocks. Each resource block has 12 subcarriers and 7 symbols.

LTE has 20 MHz bandwidth
Divided into 100 resource blocks
Each resource block has 12 subcarriers and 7 symbols

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Q5. KPI of LTE

Ans.

KPIs (Key Performance Indicators) of LTE include throughput, latency, coverage, and call setup success rate.

Throughput measures the amount of data that can be transmitted over the network in a given time period.
Latency measures the time it takes for data to travel from the source to the destination.
Coverage measures the area where the network signal is available.
Call setup success rate measures the percentage of succes...

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Q6. What is CSFB?

Ans.

CSFB stands for Circuit Switched Fallback, a technology that allows LTE devices to fallback to 2G or 3G networks for voice calls.

CSFB is used when a LTE device is unable to make a voice call over the LTE network.
It allows the device to switch to a 2G or 3G network for voice calls.
CSFB is a temporary solution until VoLTE (Voice over LTE) becomes more widely available.
CSFB can cause call setup delays and impact the user

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Q7. Why OFDMA technique used in LTE?

Ans.

OFDMA is used in LTE to improve spectral efficiency and support multiple users simultaneously.

OFDMA allows for multiple users to share the same frequency band by dividing it into smaller subcarriers.
It also enables dynamic allocation of subcarriers to users based on their bandwidth requirements.
This results in better spectral efficiency and higher data rates.
OFDMA is also resistant to interference and fading, making it...

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Q8. Differentiate FDD & TDD

Ans.

FDD and TDD are two different duplexing techniques used in wireless communication.

FDD stands for Frequency Division Duplexing and TDD stands for Time Division Duplexing.
In FDD, separate frequency bands are used for uplink and downlink communication, while in TDD, the same frequency band is used for both uplink and downlink communication.
FDD is used in technologies like 2G, 3G, and 4G LTE, while TDD is used in technolog...

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Q9. What is massive MIMO?

Ans.

Massive MIMO stands for Massive Multiple Input Multiple Output. It is a wireless communication technology that uses a large number of antennas at the base station to improve network performance.

Massive MIMO uses a large number of antennas at the base station to improve network performance.
It can significantly increase the capacity and coverage of wireless networks.
It works by using spatial multiplexing to transmit mult...

Answered by AI

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Q10. LTE Channels

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Q11. LTE Call Flow

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Q12. Type of Handover & its process

Ans.

Handover is the process of transferring an ongoing call or data session from one cell to another.

There are two types of handover: Hard Handover and Soft Handover.
Hard Handover involves breaking the connection with the current cell before establishing a connection with the new cell.
Soft Handover involves establishing a connection with the new cell before breaking the connection with the current cell.
The handover process...

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Skills evaluated in this interview

RF Engineer Interview Questions & Answers

Nokia

Ellie Riahi

posted on 1 Aug 2024

Interview experience

Good

Difficulty level

Process Duration

Result

Round 1 - HR

(2 Questions)

Q1. Why nokia and why this job

Ans.

Nokia is a global leader in telecommunications technology and I am passionate about RF engineering, making this job a perfect fit for me.

Nokia is a renowned company with a strong reputation in the telecommunications industry
I have a deep interest in RF engineering and Nokia offers opportunities to work on cutting-edge technologies in this field
The company's commitment to innovation and continuous learning aligns with m

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Q2. Some basic fundamental questions from theory

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RF Engineer Interview Questions & Answers

Qualcomm

Anonymous

posted on 22 Jan 2024

Interview experience

Average

Difficulty level

Moderate

Process Duration

2-4 weeks

Result

Not Selected

I applied via Referral and was interviewed in Dec 2023. There were 3 interview rounds.

Round 1 - Technical

(1 Question)

Q1. What is modulation, and what are the different types of modulation schemes.

Ans.

Modulation is the process of varying a carrier signal to transmit information. Different types include AM, FM, PM, and QAM.

Modulation is used to transfer information by varying a high-frequency carrier signal.
Amplitude Modulation (AM) varies the amplitude of the carrier signal to encode information.
Frequency Modulation (FM) varies the frequency of the carrier signal to encode information.
Phase Modulation (PM) varies th...

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Round 2 - Technical

(3 Questions)

Q1. What is S-matrix?

Ans.

S-matrix is a mathematical representation used in RF engineering to describe the relationship between input and output signals of a linear system.

S-matrix is also known as scattering matrix.
It is used to analyze the behavior of RF circuits and systems.
S-matrix elements represent the complex amplitudes of the incident and reflected waves at each port of a network.
S11 parameter represents the reflection coefficient at po...

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Q2. Where can you different types analog modulation schemes?

Ans.

Different types of analog modulation schemes can be found in various communication systems.

Analog modulation schemes are used in radio broadcasting, television transmission, and wireless communication.
Some common types of analog modulation schemes include amplitude modulation (AM), frequency modulation (FM), and phase modulation (PM).
AM is used in AM radio broadcasting, where the amplitude of the carrier signal is vari...

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Q3. What is VSWR and what is the need for it?

Ans.

VSWR stands for Voltage Standing Wave Ratio. It is a measure of how well a transmission line is matched to the impedance of the connected devices.

VSWR is a ratio of the maximum voltage to the minimum voltage along a transmission line.
It is used to measure the efficiency of power transfer and the impedance matching in RF systems.
A lower VSWR indicates better impedance matching and less power loss.
VSWR is important in RF...

Answered by AI

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Round 3 - Technical

(4 Questions)

Q1. What is a standing wave in a transmission line?

Ans.

A standing wave in a transmission line is a wave that appears to be stationary, resulting from the interference of two waves traveling in opposite directions.

A standing wave is formed when a wave traveling in one direction reflects back upon encountering an impedance mismatch in the transmission line.
The interference between the incident and reflected waves creates regions of constructive and destructive interference, ...

Answered by AI

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Q2. Draw waveforms of Amplitude and FM/PM modulation scheme?

Ans.

Amplitude modulation (AM) and frequency modulation (FM) waveforms can be represented graphically.

AM modulation: The amplitude of the carrier signal is varied in proportion to the amplitude of the modulating signal.
FM modulation: The frequency of the carrier signal is varied in proportion to the amplitude of the modulating signal.
Waveforms can be drawn to show the variations in amplitude or frequency over time.
AM wavefo...

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Q3. What is the propagation delay in Electromagnetic wave?

Ans.

Propagation delay is the time it takes for an electromagnetic wave to travel from one point to another.

Propagation delay is determined by the distance between the two points and the speed of light.
It is the time it takes for the wave to propagate through a medium or free space.
Propagation delay can be calculated using the formula: delay = distance / speed of light.
For example, if the distance between two points is 100 ...

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Q4. Draw Transmitter and Receiver for a communication system.

Ans.

A transmitter and receiver are essential components of a communication system.

Transmitter converts information into a suitable form for transmission.
Receiver receives the transmitted signal and converts it back into the original form.
Transmitter typically includes a modulator, power amplifier, and antenna.
Receiver typically includes an antenna, demodulator, and audio or video output.
Example: In a radio communication sy...

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Interview Preparation Tips

Topics to prepare for Qualcomm RF Engineer interview:

Communication Systems
Transmission Line
Signals and Systems

Interview preparation tips for other job seekers - It was for an entry level job and got to know about it from an acquaintance.

First Round was to judge engineering aptitude, i was asked general things and about my project. The interviewer was was very nice and friendly. A good experience overall.
Second round was a technical round questions from my projects and subjects like EMT and Communication systems was asked in great details. Friendly Interviewer, even though it was an interview I learnt a great deal. Again a very good experience.
Third Round was manager round. Again a technical round. Question asked from EMT and communication systems. The interviewer was not friendly at all, I felt like I was sitting in a college viva. The interviewer started every question with "Do you have any Idea about--" which I felt was berating and rude at least. While explaining things the interviewer interrupted me again and again and kept asking questions related to it which intimidated me. In the previous rounds of interview if I answered incorrectly or partially correctly the interviewer would ask me to rethink and give me sometime for the same. Here the interviewer would answer with "hmmm" again and again and move to the next question. Overall questions asked were from complete basics but I didn't have a good interview experience at all.

Reading previous interview experience for freshers, I was told I'd be asked for my preferred subject but that was not the case so an interviewee should be prepared for the worst.

RF Engineer Interview Questions & Answers

Qualcomm

Anonymous

posted on 23 Feb 2024

Interview experience

Average

Difficulty level

Process Duration

Result

Round 1 - Technical

(1 Question)

Q1. Based on resume

Add your answer

Round 2 - One-on-one

(1 Question)

Q1. About projects in resume

Add your answer

Round 3 - HR

(1 Question)

Q1. General questions on background

Add your answer

Ericsson Interview FAQs

How many rounds are there in Ericsson RF Engineer interview?

Ericsson interview process usually has 1-2 rounds. The most common rounds in the Ericsson interview process are Technical, Resume Shortlist and HR.

How to prepare for Ericsson RF Engineer interview?

Go through your CV in detail and study all the technologies mentioned in your CV. Prepare at least two technologies or languages in depth if you are appearing for a technical interview at Ericsson. The most common topics and skills that interviewers at Ericsson expect are KPI, Networking, RF, 3G and Field Operations.

What are the top questions asked in Ericsson RF Engineer interview?

Some of the top questions asked at the Ericsson RF Engineer interview -

Wahi is the 4G parameters in k...read more
What is difference between coupler and tapp...read more
HOW YOU CAN IMPROVE ...read more

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Ericsson RF Engineer Salary

based on 215 salaries

₹2 L/yr - ₹9.5 L/yr

17% more than the average RF Engineer Salary in India

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