Orthogonal frequency division multiplexing with generalized index modulation

Fan, Rui; Yu, Ya Jun; Guan, Yong Liang

doi:10.1109/glocom.2014.7037413

Cited by 31 publications

(15 citation statements)

References 8 publications

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“…A tight approximation for the bit error rate (BER) of OFDM-IM is presented in [3]. In [4], the spectral efficiency of OFDM-IM is improved by selecting the active subcarriers in a more flexible way. The problem of selecting the optimal number of active subcarriers for the OFDM-IM scheme is investigated in [5].…”

Section: Introductionmentioning

confidence: 99%

OFDM With Index Modulation Using Coordinate Interleaving

Başar

2015

IEEE Wireless Commun. Lett.

215

128

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Orthogonal frequency division multiplexing with index modulation (OFDM-IM), which uses the indices of the active subcarriers to transmit data, is a recently proposed multicarrier transmission technique. In this letter, we propose coordinate interleaved OFDM-IM (CI-OFDM-IM) by combining OFDM-IM and space-time block codes with coordinate interleaving. In this scheme, the real and imaginary parts of the data symbols are transmitted over different active subcarriers to achieve an additional diversity gain. The average bit error probability (ABEP) of the proposed scheme is derived and its superiority over the reference systems is shown via computer simulations.Index Terms-OFDM, coordinate interleaved orthogonal designs (CIODs), index modulation, pairwise error probability.

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Section: Introductionmentioning

confidence: 99%

OFDM With Index Modulation Using Coordinate Interleaving

Başar

2015

IEEE Wireless Commun. Lett.

215

128

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“…However, sub-optimal SE setups can be useful for sparse OFDM-IM systems, in which one gives up the maximal throughput on behalf of energy consumption minimization [41]. [12], [13]. Also, under such optimal SE configuration, the general CC lower bound becomes Ω(N ) (Corollary 1).…”

Section: Lemma 1 (Ofdm-im Mapper General CC Lower Bound)mentioning

confidence: 99%

Optimal Mapper for OFDM With Index Modulation: A Spectro-Computational Analysis

2020

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In this work, we present an optimal mapper for OFDM with index modulation (OFDM-IM). By optimal we mean the mapper achieves the lowest possible asymptotic computational complexity (CC) when the spectral efficiency (SE) gain over OFDM maximizes. We propose the spectro-computational (SC) analysis to capture the trade-off between CC and SE and to demonstrate that an N -subcarrier OFDM-IM mapper must run in exact Θ(N ) time complexity. We show that an OFDM-IM mapper running faster than such complexity cannot reach the maximal SE whereas one running slower nullifies the mapping throughput for arbitrarily large N . We demonstrate our theoretical findings by implementing an open-source library that supports all DSP steps to map/demap an N -subcarrier complex frequency-domain OFDM-IM symbol. Our implementation supports different index selector algorithms and is the first to enable the SE maximization while preserving the same time and space asymptotic complexities of the classic OFDM mapper.

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“…On the other hand, when K ≥ N /2 the APEP will plateau then begin to decrease as K tends to (N − 1), as the value of the conditional PEP within the APEP becomes increasingly smaller. These asymptotic observations are counter-intuitive, as stated in [7] "the number of active subcarriers in each OFDM subblock is fixed to a value of K and the best performance in terms of BER and spectral efficiency is achieved when K = N/2 if BPSK is used". Therefore, we asymptotically observe that the APEP of MCIK with the greedy detection behaves concavely with K for a given N .…”

Section: B Effects Of K On Apepmentioning

confidence: 99%

“…The OFDM-ISIM scheme incorporated a subblock interleaver which increased the Euclidean distance between received data symbols, resulting in performance improvement over OFDM-IM and OFDM. More recently the generalization of OFDM-IM is proposed in [7], named as OFDM with generalized index modulation (OFDM-GIM). This scheme differs from OFDM-IM in that the number of active subcarriers in a subblock is no longer fixed.…”

Section: Introductionmentioning

confidence: 99%

Low complexity greedy detection method with generalized multicarrier index keying OFDM

Crawford

2015

2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)

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Orthogonal frequency division multiplexing with generalized index modulation

Cited by 31 publications

References 8 publications

OFDM With Index Modulation Using Coordinate Interleaving

OFDM With Index Modulation Using Coordinate Interleaving

Optimal Mapper for OFDM With Index Modulation: A Spectro-Computational Analysis

Low complexity greedy detection method with generalized multicarrier index keying OFDM

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