Pilot-aided channel estimation for OFDM/OQAM

Javaudin, Jean‐Philippe; Lacroix, Dominique; Rouxel, A.

doi:10.1109/vetecs.2003.1207088

Cited by 166 publications

(105 citation statements)

References 5 publications

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“…The only difference is that in the DCO-FBMC system, a prior knowledge of the pulse-shaping filter and first order neighbour subcarriers will be needed to calculate the intrinsic interference terms on individual subcarriers [19].…”

Section: B Receiver Designmentioning

confidence: 99%

Visible light communication using DC-biased optical filter bank multi-carrier modulation

Chen

Park

Shen

et al. 2018

2018 Global LIFI Congress (GLC)

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Abstract-Filter bank multicarrier (FBMC) has become a promising candidate to replace conventional orthogonal frequency-division multiplexing (OFDM) scheme in 5G technology due to its better spectral confinement which results in a reduced inter-channel interference (ICI). However, the viability of using FBMC in visible light communication has not been verified. In this work we present the first experimental validation of the DC-biased optical filter bank multicarrier (DCO-FBMC) modulation scheme over a free-space optical channel. Under different receiving powers, up to three times bit error rate performance improvement has been achieved using DCO-FBMC with different overlapping factors compared to that of conventional DCO-OFDM.

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Section: B Receiver Designmentioning

confidence: 99%

Visible light communication using DC-biased optical filter bank multi-carrier modulation

Chen

Park

Shen

et al. 2018

2018 Global LIFI Congress (GLC)

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“…To reduce the interference on pilot symbols, Javaudin et al [18] proposed the usage of a help pilot ρ m,k . The more common naming AP has been introduced in [39].…”

Section: A Auxiliary Pilot (Ap)mentioning

confidence: 99%

“…As FBMC-OQAM suffers from intrinsic interference, several interference mitigation schemes for scattered pilots have been proposed in literature [18]- [28], which can be categorized as follows:…”

mentioning

confidence: 99%

“…The channel estimation schemes proposed in [20]- [24] require more than one redundant symbol or do not provide a closed form solution and thus go beyond the scope of this paper. The POP scheme and the modified version of it, proposed in [26] and [27], respectively, provide a closed form LS estimation for the equalizer, whereas the AP [18] and DS [19] approaches considered within the context of our contribution both deliver a LS estimate of the channel. In fact, even though the estimation technique is similar for all of these schemes, it should be made clear that two different LS problem formulations (cost functions) are being raised.…”

mentioning

confidence: 99%

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Scattered Pilot-Based Channel Estimation for Channel Adaptive FBMC-OQAM Systems

Fuhrwerk

Moghaddamnia

Peissig

2017

IEEE Trans. Wireless Commun.

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Abstract-Shaping the pulse of FilterBank MultiCarrier with Offset Quadrature Amplitude Modulation subcarrier modulation (FBMC-OQAM) systems offers a new degree of freedom for the design of mobile communication systems. In previous studies, we evaluated the gains arising from the application of Prototype Filter Functions (PFFs) and subcarrier spacing matched to the delay and Doppler spreads of doubly dispersive channels. In this paper, we investigate the impact of having imperfect channel knowledge at the receiver on the performance of Channel Adaptive Modulation (CAM) in terms of channel estimation errors and Bit Error Rate (BER). To this end, the channel estimation error for two different interference mitigation schemes proposed in the literature is derived analytically and its influence on the BER performance is analyzed for practical channel scenarios. The results show that FBMC-OQAM systems utilizing CAM and scattered pilotbased channel estimation provide a significant performance gain compared with the current one system design for a variety of channel scenarios ("one-fits-all") approach. Additionally, we verified that the often used assumption of a flat channel in the direct neighborhood of a pilot symbol is not valid for practical scenarios.

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“…Therefore, channel estimation has been considered a big problem for OFDM/QAM in dispersive channels and attracted numerous research efforts. In order to reduce the intrinsic interference to a minimum, a pilot-based channel estimation scheme has been proposed in (Javaudin, 2003) and a preamble-based channel estimation method in (Kang, 2007), where in both cases a group of adjacent symbols are carefully selected so that the intrinsic interference at the central symbol position can be greatly reduced.…”

Section: Introductionmentioning

confidence: 99%

Modified OFDM Model Based on Sub-Sliding Window Technique

Salih¹,

Mahmoud²

2011

CIS

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In modern wireless communication systems, Doppler frequency reduction is employed for efficient transmission of data in noisy environments. Achieving a very less bit error rate (BER) has been the major task in the orthogonal frequency division multiplexing (OFDM), which is a popular multicarrier modulation technique in IEEE 802.11a wireless systems and is currently being used in the IEEE 802.16e (WiMax) standard. This paper presents a modified sub-sliding window (SSW) technique that is used to improve the performance of OFDM modem for the physical layer of IEEE 802.11a standard. To carry out the simulations, the bit error rate performance of the modified and standard models is compared under the additive white Gaussian noise (AWGN) and flat fading channel. The simulation results show that the combination of SSW and OFDM technology is superior to the OFDM standard technology.

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Pilot-aided channel estimation for OFDM/OQAM

Cited by 166 publications

References 5 publications

Visible light communication using DC-biased optical filter bank multi-carrier modulation

Visible light communication using DC-biased optical filter bank multi-carrier modulation

Scattered Pilot-Based Channel Estimation for Channel Adaptive FBMC-OQAM Systems

Modified OFDM Model Based on Sub-Sliding Window Technique

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