What is the advantage of OFDM over FDM?

The OFDM technique is advantageous over FDM because it is more spectrally efficient by placing the subchannels closely until they generate an overlapping effect. Multipath distortion and RF interference are the major issues in the FDM technique while OFDM is immune to these problems.

What are the main features of OFDM?

Key features of OFDM

• Multiple carriers (called subcarriers) carry the information stream.
• The subcarriers are orthogonal to each other.
• A guard interval is added to each symbol to minimize the channel delay spread and intersymbol interference.

What are the limitations of OFDM?

Disadvantages of OFDM :

• Require highly linear amplifier.
• Sensitive to carrier offset and drift.
• Sensitive to frequency synchronization problems.
• Inter-carrier interference between the sub-carrier.
• Loss of efficiency caused by cyclic prefix or guard of interval.
• High power transmitter amplifier needs linearization.

What are the advantages of combining the MIMO and OFDM?

MIMO-OFDM is a particularly powerful combination because MIMO does not attempt to mitigate multipath propagation and OFDM avoids the need for signal equalization. MIMO-OFDM can achieve very high spectral efficiency even when the transmitter does not possess channel state information (CSI).

Which among the following is not a disadvantage of using OFDM?

Which among the following is not a disadvantage of using OFDM? Explanation: OFDM requires only the computation of fast Fourier transform and inverse fast Fourier transform of the signal to be transmitted.

What is the difference between OFDM and MIMO?

While these technologies are similar, there are key differences you should know: OFDMA allows multi-user access by subdividing a channel. MU-MIMO allows for multi-user access by using different spatial streams.

Is there any advantage of using multi carrier modulation techniques if any how explain in detailed a multi carrier modulation technique?

The advantages of MCM include relative immunity to fading caused by transmission over more than one path at a time (multipath fading), less susceptibility than single-carrier systems to interference caused by impulse noise, and enhanced immunity to inter-symbol interference.

What are the advantages and disadvantages of OFDM?

The major advantage of OFDM is its robustness against multi path propagation. Thus, it is suitable to be implemented in wireless environments. The introduction of cyclic prefix made OFDM system resistance to time dispersion. OFDM symbol rate is low since a data stream is divided into several parallel streams before transmission.

What is OFDM data modulation technique?

This page covers advantages and disadvantages of OFDM data modulation technique. It mentions benefits or advantages of OFDM and drawbacks or disadvantages of OFDM (Orthogonal Frequency Division Multiplexing). What is OFDM? OFDM stands for Orthogonal Frequency Division Multiplexing.

What is OFDM broadband channel?

➨In OFDM broadband channel is divided into smaller narrowband subchannels. This makes OFDM resistive to frequency selective fading. Moreover OFDM transmit/receive chain uses channel encoder/decoder and interleaver/deinterlaver which help in recovering lost OFDM symbols due to fading.

What are the different types of OFDM?

There are various variants of OFDM which include f-OFDM (Flash OFDM), Hybrid-OFDM, OFDMA, VOFDM, WOFDM etc. ➨The OFDM spectrum is composed of overlapped narrow subcarriers. This makes efficient usage of frequency spectrum compare to traditional FDM method. ➨In OFDM broadband channel is divided into smaller narrowband subchannels.