Numerical performance evaluation for Alamouti space time coded OFDM under receiver impairments

Krondorf, M.; Fettweis, Gerhard

doi:10.1109/twc.2009.080172

Cited by 10 publications

(9 citation statements)

References 11 publications

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“…The block-by-block adaptive channel-and-phase estimator At the end of each pair of blocks, the channel and phase estimates are used to construct the matrixĈ k [2n], which is in turn used to obtain the refined data symbol estimates (6). In this manner, at every odd time instant m = 2n + 1, the Alamouti structure is exploited, yielding more reliable symbol decisions for the channel estimator.…”

Section: B Channel Estimation and Phase Predictionmentioning

confidence: 99%

Alamouti space time coded OFDM for underwater acoustic channels

Stojanovic

2010

Oceans'10 Ieee Sydney

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Abstract-Alamouti space-time coding is investigated in conjunction with OFDM modulation for high-rate underwater acoustic communications over time varying channels. The scheme's diversity gain is exploited using a low-complexity adaptive multichannel receiver. Performance is demonstrated using experimental data transmitted in a 10 kHz bandwidth over a 1 km shallow water channel south of the Martha's Vineyard island in New England. The two-transmitter Alamouti scheme shows the expected improvement over the same-rate single-transmitter scheme.

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Section: B Channel Estimation and Phase Predictionmentioning

confidence: 99%

Alamouti space time coded OFDM for underwater acoustic channels

Stojanovic

2010

Oceans'10 Ieee Sydney

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“…Krondorf and Fettwis [13,14] numerically evaluate the bit error rate performance of a coded and uncoded OFDM systems with all impairments including carrier frequency offset (CFO), I/Q imbalance, frequency selectivity and channel estimation errors on direct conversion ZF receiver with Least Square (LS) channel estimation. The inter-carrier interference (ICI) due to CFO and I/Q imbalance on effective transmitted symbol is assumed to be Gaussian distributed.…”

Section: Introductionmentioning

confidence: 99%

SER/BER expression for M-QAM OFDM systems with imperfect channel estimation and I/Q imbalance

Oruthota

Tirkkonen

2012

J Wireless Com Network

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We investigate the joint effect of channel estimation and frequency flat transmitter and receiver I/Q imbalance on an Orthogonal Frequency Division Multiplex (OFDM) system. We assume independent fading with identically and independently distributed (i.i.d) mirror carrier channel coefficients. Closed form expressions for symbol error rate and bit error rate of M-QAM modulation are derived. We consider join and separate channel estimation, as well as joint and separate equalization of the mirror carriers. Performance is evaluated by treating the I/Q interference as a non-Gaussian random variable. The results show that a Gaussian approximation of I/Q interference is very good, especially for low order modulations.

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“…One way to achieve a performance gain is by means of orthogonal spacetime block codes (STBC), such as the Alamouti code [1] [2]. However, it is well known that OFDM-based systems are sensitive to the intercarrier interference (ICI) generated by a carrier frequency offset (CFO), which degrades the error probability performance for both single-antenna OFDM systems [3]- [6] and MIMO STBC-OFDM systems [7]- [10].…”

Section: Introductionmentioning

confidence: 99%

“…Unlike single-antenna OFDM systems, the error probability analysis for coherently detected orthogonal STBC-OFDM systems with CFO and Rayleigh fading has been considered only partially, using the direct method [7]- [10]. In particular, the analyses of [7] and [8] approximate the ICI power on a certain subcarrier as independent from the channel gain in that subcarrier.…”

Section: Introductionmentioning

confidence: 99%

“…Despite the ICI power approximation of [7]- [8] may be acceptable for highly frequency-selective channels, it has been shown in [9] that the error floor is largely overestimated for flat-fading channels and inexact for moderately frequencyselective fading channels. On the other hand, the performance analysis of [10], which also includes different receiver impairments, models the dependency of the ICI power from the subcarrier gain, but unfortunately the error probability is evaluated only numerically, without providing a closed-form expression. In addition, the analyses of [7]- [10] assume that the two transmit channels are independent.…”

Section: Introductionmentioning

confidence: 99%

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Performance of Alamouti Space-Time Coded OFDM with Carrier Frequency Offset

Rugini

Banelli

Suraweera

et al. 2011

2011 IEEE Global Telecommunications Conference - GLOBECOM 2011

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We investigate the error probability for Alamouti space-time coded orthogonal frequency-division multiplexing (OFDM) systems with carrier frequency offset (CFO) and multipath fading channels. Our main assumptions are: frequencyselective Rayleigh fading, a single receive antenna, and coherent detection. We derive new closed-form results for the (symbol or bit) error probability, for both spatially uncorrelated channels and spatially correlated channels. The proposed analysis shows that the error floor due to the CFO is strongly dependent on the power-delay profile of the multipath channel. Simulation results confirm the accuracy of the proposed theoretical analysis.

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Numerical performance evaluation for Alamouti space time coded OFDM under receiver impairments

Cited by 10 publications

References 11 publications

Alamouti space time coded OFDM for underwater acoustic channels

Alamouti space time coded OFDM for underwater acoustic channels

SER/BER expression for M-QAM OFDM systems with imperfect channel estimation and I/Q imbalance

Performance of Alamouti Space-Time Coded OFDM with Carrier Frequency Offset

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