Equalization Concepts for Alamouti's Space–Time Block Code

Gerstacker, Wolfgang H.; Obernosterer, F.; Schober, Robert; Lehmann, A.; Lampe, A.; Gunreben, P.

doi:10.1109/tcomm.2004.831357

Cited by 47 publications

(38 citation statements)

References 43 publications

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“…Similar conclusions were made for a WL MOE receiver derived in [15]. The application of WLP to the complex modulation schemes was addressed in several papers, e.g., in [16,17] where WLP was applied to complex signals which become improper by space-time block coding or widely linear space-time mapping. A novel iterative multiuser detector for DS-CDMA systems with complex modulation schemes was proposed in [18].…”

Section: Introductionmentioning

confidence: 55%

Enhanced subspaced approach to interference mitigation

Xiao

Yin

Tafazolli

et al. 2011

2011 11th International Symposium on Communications &Amp; Information Technologies (ISCIT)

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Abstract-In this paper, we study an enhanced subspace based approach for the mitigation of multiple access interference (MAI) in direct-sequence code-division multiple-access (DS-CDMA) systems over frequency-selective channels. Blind multiuser detection based on signal subspace estimation is of special interest in mitigating MAI in CDMA systems since it is impractical to assume perfect knowledge of parameters such as spreading codes, time delays and amplitudes of all the users in a rapidly changing mobile environment. We develop a new blind multiuser detection scheme which only needs the priori knowledge of the signature waveform and timing of the user of interest. By exploiting the improper nature of multiple access interference (MAI) and intersymbol interference (ISI), the enhanced detector shows clear superiority to the conventional subspace-based blind multiuser detector. The performance advantages are shown to be more obvious in heavily loaded systems when the number of active users is large.

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Section: Introductionmentioning

confidence: 55%

Enhanced subspaced approach to interference mitigation

Xiao

Yin

Tafazolli

et al. 2011

2011 11th International Symposium on Communications &Amp; Information Technologies (ISCIT)

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“…However, the application of the WLP in the literature, including those mentioned above, is mostly confined to the real-valued signal constellations. The application of WLP to complex signals has been addressed in several papers, e.g., in [23], [24] where WLP was applied to complex signals which become rotationally variant due to the use of space-time block coding or widely linear space-time mapping. It was shown in [25] that significant gains can be obtained for complex signals if the rotational variance of the residual interference arising in the course of the iterations of an ISDIC is regarded.…”

Section: B Modified Isdic Schemementioning

confidence: 99%

MIMO Detection Schemes with Interference and Noise Estimation Enhancement

Xiao

Cowan

2011

IEEE Trans. Commun.

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“…This concept has been applied for numerous wireless applications [34][35][36][37][38][39][40][41][42][43] including equalization, interference suppression, multiuser detection, etc. Implementation WL equalizers is discussed in [39] for conventional time domain single-carrier systems.…”

Section: Introductionmentioning

confidence: 99%

Performance limits of conventional and widely linear DFT-precoded-OFDM receivers in wideband frequency-selective channels

Kuchi

2014

J Wireless Com Network

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This paper describes the limiting behavior of linear and decision feedback equalizers (DFEs) in single/multiple antenna systems employing real/complex-valued modulation alphabets. The wideband frequency-selective channel is modeled using a Rayleigh fading channel model with infinite number of time domain channel taps. Using this model, we show that the considered equalizers offer a fixed post detection signal-to-noise ratio (post-SNR) at the equalizer output that is close to the matched filter bound (MFB). General expressions for the post-SNR are obtained for zero-forcing (ZF)-based conventional receivers as well as for the case of receivers employing widely linear (WL) processing. Simulation is used to study the bit error rate (BER) performance of both minimum-mean-square-error (MMSE) and ZF-based receivers. Results show that the considered receivers advantageously exploit the rich frequency-selective channel to mitigate both fading and inter-symbol interference (ISI) while offering a performance comparable to the MFB.

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Equalization Concepts for Alamouti's Space–Time Block Code

Cited by 47 publications

References 43 publications

Enhanced subspaced approach to interference mitigation

Enhanced subspaced approach to interference mitigation

MIMO Detection Schemes with Interference and Noise Estimation Enhancement

Performance limits of conventional and widely linear DFT-precoded-OFDM receivers in wideband frequency-selective channels

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