Error performance of ultrawideband spatial multiplexing systems

Adeane, J.; Malik, W.Q.; Wassell, I.J.

doi:10.1049/iet-map.2008.0008

Cited by 13 publications

(10 citation statements)

References 13 publications

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“…The base station transmits independent data streams from each transmit antenna to the subscriber's stations. It could be implemented using Zero-forcing (ZF), Maximum likelihood or MMSE (Minimum Mean Square Error) detectors [8]. The ZF detector inverts the channel matrix to detect the transmitted symbols.…”

Section: System Modelmentioning

confidence: 99%

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Performance Evaluation and Analysis of Switching Algorithms in MIMO-OFDM System with Ideal and Non-Ideal CSI

Mlayeh¹,

Tlili²,

Rouissi³

et al. 2010

IJCNS

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In this paper we analyzed the bit error rate performance of a switching algorithm between spatial multiplex-ing and diversity for an OFDM MIMO system with ideal channel state information. The effect of channel estimation error was studied and we verified by simulations that the spatial multiplexing outperforms the switching algorithm. Given that the switching algorithm is based on the comparison of the channel matrix Demmel condition number to a threshold, its accuracy is compromised when channel estimation error in-creases. As a first intuitive solution, we proceeded to the adaptation of the threshold, but this didn’t lead to a pertinent improvement for the main reason that channel estimation errors did affect the MIMO techniques which use different constellation. Based on that, we proposed a new estimation technique that improved the bit error rate performance significantly

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Section: System Modelmentioning

confidence: 99%

“…In addition, spatial multiplexing techniques offer higher peak throughput by transmitting independently and separately encoded data signals from each of the multiple transmit antennas [7,8]. Furthermore, when the MIMO technique is selected based on feedback information about the channel state, this can lead to higher link robustness.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation and Analysis of Switching Algorithms in MIMO-OFDM System with Ideal and Non-Ideal CSI

Mlayeh¹,

Tlili²,

Rouissi³

et al. 2010

IJCNS

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“…The combination of MIMO and Multiband-OFDM UWB systems have been mentioned in the literature, such as [4], [5]. In [4], the authors proposed a space-time-frequency (STF) coded MB-OFDM UWB system under channels with a lognormal distribution.…”

Section: Introductionmentioning

confidence: 99%

“…In [4], the authors proposed a space-time-frequency (STF) coded MB-OFDM UWB system under channels with a lognormal distribution. Meanwhile, in [5], the authors considered spatial multiplexing MIMO for MB-OFDM UWB systems. These works only investigated the systems with harddemapping and do not offer very high data rates.…”

Section: Introductionmentioning

confidence: 99%

Double space-time transmit diversity for very high data rate MB-OFDM UWB systems

Tran

Safaei

2012

2012 International Symposium on Communications and Information Technologies (ISCIT)

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In this paper, we investigate a multiband-orthogonal frequency division multiplexing ultra-wideband (MB-OFDM UWB) system with very high data rates (VHDR) of several gigabits per second (Gbps). We propose a DSTTD-based VHDR MB-OFDM UWB system by incorporating a double space-time transmit diversity (DSTTD) scheme into the conventional MB-OFDM UWB system. At the receiver, an efficient soft-demapper that takes into consideration the noise enhancement due to a zero-forcing equalization is developed. Numerical simulations of the proposed system at a very high data rate of 2.Gbps over the IEEE 802.15.3a channel models are implemented. The simulation results show that this system could achieve a very good performance in a low signal-to-noise ratio (SNR) region. Abstract-In this paper, we investigate a multiband-orthogonal frequency division multiplexing ultra-wideband (MB-OFDM UWB) system with very high data rates (VHDR) of several gigabits per second (Gbps). We propose a DSTTD-based VHDR MB-OFDM UWB system by incorporating a double space-time transmit diversity (DSTTD) scheme into the conventional MB-OFDM UWB system. At the receiver, an efficient soft-demapper that takes into consideration the noise enhancement due to a zero-forcing equalization is developed. Numerical simulations of the proposed system at a very high data rate of 2.Gbps over the IEEE 802.15.3a channel models are implemented. The simulation results show that this system could achieve a very good performance in a low signal-to-noise ratio (SNR) region.

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“…Extending MIMO to the UWB regime in [3], we demonstrated a large gain in the channel capacity, robustness and coverage radius of UWB indoor communications systems with the use of multiple antennas. In [4], we proposed and analysed various detection techniques for UWB MIMO spatial multiplexing (SM) systems. The space-time coding implementation of MIMO was applied to UWB in [5], and significant performance improvement was reported.…”

Section: Introductionmentioning

confidence: 99%

Simple correlated channel model for ultrawideband multiple-input multiple-output systems

Adeane

Malik

Wassell

et al. 2007

IET Microw. Antennas Propag.

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A simple correlated channel model for ultrawideband (UWB) multiple-antenna systems is proposed. The authors show that a single numerical value of the spatial correlation coefficient is sufficient to accurately model the performance of UWB spatial multiplexing systems in an indoor environment. The appropriate value of the correlation coefficient is selected by ensuring a close match between the bit error rate results achieved on the proposed correlated channel and those on the measured indoor channel. The authors also experimentally confirm that the performance substantially degrades in the presence of high values of spatial correlation for a range of spatial multiplexing receivers, and quantify the relationship between this degradation and the value of the spatial correlation coefficient. Thus, a route for the development of the existing standards for singleantenna UWB channels to the multiple-antenna regime is provided here.

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Error performance of ultrawideband spatial multiplexing systems

Cited by 13 publications

References 13 publications

Performance Evaluation and Analysis of Switching Algorithms in MIMO-OFDM System with Ideal and Non-Ideal CSI

Performance Evaluation and Analysis of Switching Algorithms in MIMO-OFDM System with Ideal and Non-Ideal CSI

Double space-time transmit diversity for very high data rate MB-OFDM UWB systems

Simple correlated channel model for ultrawideband multiple-input multiple-output systems

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