Spectral Efficiency Comparison of OFDM and MC-CDMA with Carrier Frequency Offset

Ahmed, Junaid

doi:10.13164/re.2017.0221

Cited by 2 publications

(1 citation statement)

References 17 publications

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“…Furthermore, the spread spectrum signal of the D2D pairs inherently has high tolerance to narrow band interference caused by the cellular users [12] so that complicated resource allocation techniques for interference mitigation are not required. As such, the spread spectrum techniques require little or no control signaling for coordination and are therefore simpler to implement [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Ergodic Capacity of D2D Underlay Communication using MC-CDMA

Ahmed¹,

Wyne²

2019

RADIOENGINEERING

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Device to device (D2D) communication that underlay conventional cellular networks can increase their spectrum utilization. However, since D2D pairs share the frequency band with cellular users, interference between these two network tiers can become a major performance bottleneck. In this scenario, use of a spread spectrum technique can be a good choice for D2D communication, due to its inherent interference mitigation capability. In this work, we analyze the achievable ergodic capacity for a D2D user pair that uses multi-carrier code division multiple access (MC-CDMA). Interference from both cellular users and other D2D pairs is considered under Rayleigh faded links and carrier frequency offset. Our derived expression requires a single integration and gives a tight lower bound to achievable ergodic capacity.

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Section: Introductionmentioning

confidence: 99%

Ergodic Capacity of D2D Underlay Communication using MC-CDMA

Ahmed¹,

Wyne²

2019

RADIOENGINEERING

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Spectral Efficiency for Orthogonal Frequency Division Multiplexing

Ms. Swarnita Gorakshnath Kale,

Prof. Kale G. B.

2024

IJARSCT

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Orthogonal Frequency Division Multiplexing (OFDM) is a special form of multicarrier modulation (MCM) with heavily spaced subcarriers as well as overlapping spectra was patented in the United States of America in 70s. Orthogonal Frequency Division Multiplexing has been popularly utilized in modern days due to its ability for spectral efficiency and robustness to noise and fading. It provides flexibility and agile spectrum allocation in case of cognitive radios. This paper will focus on OFDM research and simulation for enhancement of spectral efficiency. OFDM is especially compatible for high-speed wireless communication due to its resistance to Inter symbol Interference. As in modern days communication systems has increased their data transfer speed, the required time for each transmission has become very short. As delay time due to multipath remains constant, Inter symbol interference became limitation in high-data-rate communication. OFDM avoids this difficulty by transmitting numerous low speed transmissions simultaneously

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Spectral Efficiency Comparison of OFDM and MC-CDMA with Carrier Frequency Offset

Abstract: KeywordsOFDM, MC-CDMA, spectral efficiency, carrier frequency offset, inter-carrier interference, multiple access interference

Cited by 2 publications

References 17 publications

Ergodic Capacity of D2D Underlay Communication using MC-CDMA

Ergodic Capacity of D2D Underlay Communication using MC-CDMA

Spectral Efficiency for Orthogonal Frequency Division Multiplexing

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