A block-Alamouti scheme for filter bank based multicarrier transmission

Renfors, Markku; Ihalainen, Tero; Stitz, Tobias Hidalgo

doi:10.1109/ew.2010.5483517

Cited by 57 publications

(25 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 4 shows the number of real operations for the IFFT preprocessing required for OFDM/OQAM according to [6] and the presented OFDM/CR-OQAM. For higher number of subcarriers K, the complexity of the proposal converges to the complexity of [6]; however, for a number of subcarriers in the range 2 4 to 2 11 , a complexity reduction between 25 and 10 % is achieved.…”

Section: Tablementioning

confidence: 99%

“…This approach is similar to the proposed TR-STC; however, the time-reversal is carried out on the data domain instead of the signal domain and hence requires two separate modulations for each block. In the present proposal, the transmitted signal itself is time-reversed which can be implemented by simply reading memory in reverse order and hence exhibits a lower complexity compared to the work in [11]. Furthermore, the approach in [11] requires long guard intervals due to the long filter tails of FBMC that are used to achieve low OOB emission and hence reduces spectral efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…However, the scheme requires the channel to be flat over a range of subcarriers which is especially hard to achieve in rich-scattering environments. Furthermore, the authors in [11] propose to artificially divide the OFDM/OQAM stream into blocks that are separated by guard intervals. The data in each block is then space-time encoded by reversing the time direction of the data set on one antenna.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Conjugate root offset-QAM for orthogonal multicarrier transmission

Matthé

Fettweis

2016

EURASIP J. Adv. Signal Process.

View full text Add to dashboard Cite

Current implementations of orthogonal frequency-division multiplexing (OFDM)/offset quadrature amplitude modulation (OQAM) are restricted to band-limited symmetric filters. To circumvent this, non-symmetric conjugate root (CR) filters are proposed for OQAM modulation. The idea is applied to Generalized Frequency Division Multiplexing (GFDM) and a method for achieving transmit diversity with OQAM modulation is presented. The proposal reduces implementation complexity compared to standard OQAM by modifying the transmit phase space which is exploited by a real-valued fast Fourier transform (FFT) operation. Generalized frequency division multiplexing (GFDM)/CR-OQAM outperforms conventional GFDM using QAM modulation in terms of symbol error rate in fading multipath channels and provides a more localized spectrum compared to GFDM/OQAM.

show abstract

Section: Tablementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Conjugate root offset-QAM for orthogonal multicarrier transmission

Matthé

Fettweis

2016

EURASIP J. Adv. Signal Process.

View full text Add to dashboard Cite

show abstract

“…A maximum likelihood SM detection scheme for FBMC able to compensate for the offset-QAM (OQAM) interference is proposed in [12]. Those dedicated STC and SM schemes for FBMC however induce a complexity increase and suffer from a performance loss compared to equivalent OFDM schemes [11,12]. MIMO schemes for FBMC and GFDM are still under development.…”

Section: Introductionmentioning

confidence: 99%

“…In FBMC, interference also prevent standard STBC Alamouti schemes to be reused for symbol-wise coding. A block-wise coding scheme was therefore designed in [11]. A maximum likelihood SM detection scheme for FBMC able to compensate for the offset-QAM (OQAM) interference is proposed in [12].…”

Section: Introductionmentioning

confidence: 99%

Performance of emerging multi-carrier waveforms for 5G asynchronous communications

Eeckhaute

Bourdoux

Doncker

et al. 2017

J Wireless Com Network

View full text Add to dashboard Cite

This paper presents an extensive and fair comparison among the most promising waveform contenders for the 5G air interface. The considered waveform contenders, namely filter-bank multi-carrier (FBMC), universal-filtered multi-carrier (UFMC), generalized frequency-division multiplexing (GFDM) and resource-block filtered orthogonal frequency-division multiplexing (RB-F-OFDM) are compared to OFDM used in 4G in terms of spectral efficiency, numerical complexity, robustness towards multi-user interference (MUI) and resilience to power amplifier non-linearity. FBMC shows the best spectral containment and reveals to be almost insensitive to multi-user interference. It however suffers from its bad spectral efficiency for short bursts and from its poor multiple input multiple output (MIMO) compatibility. GFDM reveals to be the most promising contender, with the best spectral efficiency and the smallest complexity overhead compared to OFDM. It is also the most resilient to multi-user interference after FBMC and is MIMO compatible as soon as the interference can be managed. UFMC and RB-F-OFDM are finally the closest to OFDM and benefit therefore from a better compatibility with existing systems, even if their performance is generally lower than FBMC and GFDM.

show abstract

Block-wise Alamouti schemes for OQAM-OFDM systems with complex orthogonality

Chen

et al. 2016

Wirel. Commun. Mob. Comput.

View full text Add to dashboard Cite

Offset quadrature amplitude modulation‐based orthogonal frequency division multiplexing (OFDM) systems cannot be directly combined with the Alamouti code because of the intrinsic imaginary interference. In this paper, we propose a block‐wise space‐frequency block coding (SFBC) scheme and a block‐wise space‐time block coding (STBC) scheme for offset quadrature amplitude modulation‐based OFDM systems, which achieve bit error rate performances that are close to OFDM systems. The proposed schemes satisfy the orthogonality condition of the Alamouti code in the complex field with guard band/intervals. To improve the spectral efficiency of the block‐wise SFBC scheme, we also consider the case without the guard band. It is observed that only the two innermost subcarriers do not satisfy the complex orthogonality condition when the guard band is removed. Then, a simple equalization scheme is proposed to independently equalize the two innermost subcarriers. Simulation results show that the block‐wise SFBC scheme works well under channels with mild‐to‐moderate frequency selectivity, and the block‐wise (STBC ) scheme suffers less than 1 dB loss under severe frequency selective channels at the bit error rate of 10 − 3, when only a simple one tap zero‐forcing equalizer is employed. Copyright © 2016 John Wiley & Sons, Ltd.

show abstract

A block-Alamouti scheme for filter bank based multicarrier transmission

Cited by 57 publications

References 15 publications

Conjugate root offset-QAM for orthogonal multicarrier transmission

Conjugate root offset-QAM for orthogonal multicarrier transmission

Performance of emerging multi-carrier waveforms for 5G asynchronous communications

Block-wise Alamouti schemes for OQAM-OFDM systems with complex orthogonality

Contact Info

Product

Resources

About