Why is a cyclic prefix required in an OFDMA?(a) To ensure symbol time is an integer number(b) To help overcome multipath and ISI(c) To maintain orthogonality(d) To make OFDMA scalableI had been asked this question in exam.I need to ask this question from Orthogonal Frequency Division Multiple Access (OFDMA) topic in portion 4G of Wireless/Mobile

Why is a cyclic prefix required in an OFDMA?(a) To ensure symbol time

1.	Why is a cyclic prefix required in an OFDMA?(a) To ensure symbol time is an integer number(b) To help overcome multipath and ISI(c) To maintain orthogonality(d) To make OFDMA scalableI had been asked this question in exam.I need to ask this question from Orthogonal Frequency Division Multiple Access (OFDMA) topic in portion 4G of Wireless/Mobile
Answer» Correct CHOICE is (b) To help overcome multipath and ISI Best explanation: Use of cyclic PREFIX is a KEY element of enabling the OFDM signal to operate reliably. The cyclic prefix acts as a buffer REGION or guard INTERVAL to protect the OFDM signals from intersymbol interference.

Discussion

No Comment Found

Related InterviewSolutions

_______ is an additional open-loop MIMO technique considered by the WiMAX vendors.(a) STTD(b) SM(c) Collaborative Uplink MIMO(d) MU-MIMOI have been asked this question by my school principal while I was bunking the class.This intriguing question originated from Multiple Input Multiple Output (MIMO) in section 4G of Wireless/Mobile
_______ is a technique of transmit diversity used in UMTSS third-generation cellular systems.(a) STTD(b) SM(c) Collaborative Uplink MIMO(d) MU-MIMOI have been asked this question in an interview.This interesting question is from Multiple Input Multiple Output (MIMO) in chapter 4G of Wireless/Mobile
In OFDMA, what is the relationship between the subcarrier spacing f and symbol time t?(a) f=t(b) f=1/2t(c) f=1/t(d) no relationThis question was addressed to me in an online interview.The doubt is from Orthogonal Frequency Division Multiple Access (OFDMA) topic in portion 4G of Wireless/Mobile
Which of the following is not a part of the characteristic of 4G network?(a) Multirate management(b) Fully converged services(c) Software dependency(d) Diverse user devicesThe question was posed to me in an online quiz.My doubt stems from 4G Network Architecture topic in section 4G of Wireless/Mobile
Which of the following is not a part of the characteristic of 4G network?(a) Multirate management(b) Fully converged services(c) Software dependency(d) Diverse user devicesI got this question during an interview.Enquiry is from 4G Network Architecture topic in portion 4G of Wireless/Mobile
Which channel indicates the number of symbols used by the PDCCH?(a) PHICH(b) PDCCH(c) PBCH(d) PCFICHThis question was addressed to me by my college director while I was bunking the class.My question is based upon Long Term Evolution (LTE) in portion 4G of Wireless/Mobile
Which UE category supports 64 QAM on the uplink?(a) Only category 5(b) Only category 4(c) Only category 3(d) Category 3,4 and 5The question was posed to me in an internship interview.This intriguing question comes from Long Term Evolution (LTE) in portion 4G of Wireless/Mobile
Common data rates of IEEE 802.11 OFDM are ____________(a) 18 Mbps(b) 200 Mbps(c) 50 Mbps(d) 54 MbpsThe question was asked in exam.This key question is from Orthogonal Frequency Division Multiple Access (OFDMA) in division 4G of Wireless/Mobile
With the normal cyclic prefix, how many symbols are contained in 1 frame?(a) 7(b) 140(c) 12(d) 40I have been asked this question in unit test.Origin of the question is 4G Network Architecture in section 4G of Wireless/Mobile
What does SGSN stands for?(a) Serving GPRS Support Node(b) Supporting GGSN Support Node(c) Supporting GPRS Support Node(d) Supporting Gateway Support NodeThe question was asked in class test.This is a very interesting question from 4G Network Architecture in portion 4G of Wireless/Mobile

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment