Effect of Subcarrier Activation Ratio on the Performance of OFDM-IM over Rayleigh Fading Channel

Siddiq, Abdulrahman Ikram

doi:10.1109/lcomm.2017.2668410

Cited by 21 publications

(12 citation statements)

References 19 publications

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“…Fig.7 indicates that various G and b 1 can cause different BER performances. When G = 8, and b 1 = 4, no matter what transmission rate R is, the corresponding BER performance is the worst compared with other allocation ways due to its large SAPs [27]. Intuitively, it was expected that when b 1 is same, larger G would bring better performance because more index bits can be used for decoding.…”

Section: Block Creatormentioning

confidence: 99%

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Polar-Coded OFDM With Index Modulation

Zhang

Shahrrava

2021

IEEE Access

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Section: Block Creatormentioning

confidence: 99%

“…where γ b = α 2 E b N0 is the average SNR per bit, α is the average fading amplitude and E b is the average bit energy. To have d errors, for a given n and k, the number of different sub-carrier states between a transmitted SAP i and incorrectly received SAP j is given as [27]:…”

Section: Appendixmentioning

confidence: 99%

Polar-Coded OFDM With Index Modulation

Zhang

Shahrrava

2021

IEEE Access

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“…We consider ISP dan REC pulse applied to the OFDM system in a flat fading Rayleigh channel as shown in Figure 2 [20,23,24]. The pulse shaping function was applied at the transmitter.…”

Section: Simulation Modelmentioning

confidence: 99%

Pulse shaping methods for inter carrier interference reduction in OFDM system

Wirastuti

Anggitiadewi²,

Pramaita

2020

TELKOMNIKA

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The weakness of the orthogonal freuency division multiplexing (OFDM) system is susceptible to the existence of carrier frequency offset (CFO) which causes the emergence of inter carrier interference (ICI) which causes a degradation of performance OFDM systems. This study aims to apply the suggested rectangular (REC) pulse and improved sinc-power (ISP) pulse shaping methods on OFDM system and determines ICI reduction with the effects of CFO over flat fading Rayleigh channels. The performance of each pulse shaping method is evaluated and compared based on parameter ICI power vs. normalized frequency offset, signal to interference ratio (SIR) vs. normalized frequency offset and bit error rate (BER) vs. energy bit per noise (Eb/No). The simulation result in terms of BER vs. Eb/No indicated that REC and ISP pulse shaping has better performance dealing with ICI reduction compared to OFDM system no applied pulse shaping. In addition, the ISP is able to mitigate ICI better than REC.

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“…Optical orthogonal frequency division multiplexing (O-OFDM) is deemed as a more suitable modulation scheme for VLC than the single-carrier schemes, since O-OFDM suffers less from intersymbol interference and has high spectral efficiency [4]. In order to maintain the signals real-valued and non-negative, several O-OFDM schemes have been proposed, such as direct current biased O-OFDM (DCO-OFDM) [5] and asymmetrically clipped O-OFDM [6].…”

Section: Introductionmentioning

confidence: 99%

A Dimmable OFDM Scheme With Dynamic Subcarrier Activation for VLC

et al. 2020

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Dimmable optical orthogonal frequency division multiplexing (D-OFDM) is challenging to design for visible light communications, due to the high peak-to-average power ratio (PAPR) of OFDM signals and limited dynamic range of LEDs. Current D-OFDM schemes focused on the time domain and spatial domain designs of OFDM signals. This paper proposes a novel dynamic subcarrier activation based OFDM (DSA-OFDM) scheme. In DSA-OFDM, the number of activated subcarriers, as well as the signal's DC bias and the number of activated LEDs, is adjusted to provide both flexible dimming control and reliable communication. A generalized index modulation in both spatial domain and frequency domain is designed to select the activated subcarriers and activated LEDs. To show the influence of frequency domain design analytically, the closed-form expressions of the PAPR and the clipping noise of the DSA-OFDM signals are derived, and the optimized signal form is obtained accordingly. Simulation and numerical results show that the proposed scheme can outperform conventional dimming control schemes at various illumination levels in terms of the bit-error rate performance.

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Effect of Subcarrier Activation Ratio on the Performance of OFDM-IM over Rayleigh Fading Channel

Cited by 21 publications

References 19 publications

Polar-Coded OFDM With Index Modulation

Polar-Coded OFDM With Index Modulation

Pulse shaping methods for inter carrier interference reduction in OFDM system

A Dimmable OFDM Scheme With Dynamic Subcarrier Activation for VLC

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