Unitary space-time modulation for multiple-antenna communications in Rayleigh flat fading

Hochwald, Bertrand M.; Marzetta, Thomas L.

doi:10.1109/18.825818

Cited by 906 publications

(801 citation statements)

References 16 publications

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“…In practice this can be obtained by introducing some pilot symbols that enable accurate channel estimation, so that we can assume that the channel matrix H is known at the receiver. For the non-coherent case, many different solutions are available and we address the reader to [5,29]. Definition 2.1.…”

Section: Design Criteria For Space-time Codesmentioning

confidence: 99%

Cyclic Division Algebras: A Tool for Space-Time Coding

Oggier

Belfiore

Viterbo

2007

FNT in Communications and Information Theory

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Multiple antennas at both the transmitter and receiver ends of a wireless digital transmission channel may increase both data rate and reliability. Reliable high rate transmission over such channels can only be achieved through Space-Time coding. Rank and determinant code design criteria have been proposed to enhance diversity and coding gain. The special case of full-diversity criterion requires that the difference of any two distinct codewords has full rank.Extensive work has been done on Space-Time coding, aiming at finding fully diverse codes with high rate. Division algebras have been proposed as a new tool for constructing Space-Time codes, since they are non-commutative algebras that naturally yield linear fully diverse codes. Their algebraic properties can thus be further exploited to improve the design of good codes.The aim of this work is to provide a tutorial introduction to the algebraic tools involved in the design of codes based on cyclic division algebras. The different design criteria involved will be illustrated, including the constellation shaping, the information lossless property, the non-vanishing determinant property, and the diversity multiplexing trade-off. The final target is to give the complete mathematical background underlying the construction of the Golden code and the other Perfect Space-Time block codes.

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Section: Design Criteria For Space-time Codesmentioning

confidence: 99%

Cyclic Division Algebras: A Tool for Space-Time Coding

Oggier

Belfiore

Viterbo

2007

FNT in Communications and Information Theory

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“…If the channel h (k) is unknown to the receiver, and the signal matrices {Φ l } L l=1 are transmitted with equal probabilities, the maximum likelihood receiver for USTM is a QR, given by [1] …”

Section: Noncoherent Detectormentioning

confidence: 99%

“…Unitary space-time modulation (USTM) [1] is very suitable for noncoherent detection using a quadratic receiver (QR) without channel state information (CSI) at the receiver. However, a coherent receivers (CR) with perfect CSI can bring about approximately 3 dB signal to noise ratio (SNR) over a QR.…”

Section: Introductionmentioning

confidence: 99%

Iterative receiver design for general nonorthogonal unitary space-time constellations

Yuan

Huagang

et al. 2012

IEICE Electron. Express

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A simple iterative receiver for general nonorthogonal unitary space-time constellations (NOUSTC) is proposed. The output of the conventional noncoherent detector is used to initialize the receiver. In each iteration, the decision from last iteration is used to transform the received signals to derive new signals that bear channel state information (CSI), which are then employed to estimate the CSI using a Wiener filter, following a coherent detector is implemented. In our scheme, for each time block we can use not only the past and the present CSI-bearing signals, but also the future ones, to estimate the CSI, thus resulting in a relatively refined channel estimate and ultimately a receiver with good performance. Simulation results verify the performance of the proposed receiver. Keywords: channel estimation, unitary space-time modulation, iterative receiver, Wiener filter Classification: Wireless communication hardware References

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“…In [4], a novel treatment to compute the capacity of the wireless channel where neither the transmitter nor the receiver knows the fading coefficients has been performed. It was shown in [4], [5] that the class of unitary space-time constellations is most suitable to achieve the capacity for this type of channels. Furthermore, by evaluating the asymptotic union bound (AUB), it was pointed out in [6] that the use of unitary signal constellations results in the minimization of AUB.…”

Section: Introductionmentioning

confidence: 99%

Tight error bound for coded unitary space-time modulation

Tran

Nguyen

Le‐Ngoc

2006

IEEE Wireless Communications and Networking Conference, 2006. WCNC 2006.

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Abstract-This paper studies the bit error probability (BEP) of coded unitary space-time modulation with iterative decoding where neither the transmitter nor the receiver knows the channel fading coefficients. The tight error bound on the asymptotic performance is first analytically derived for given unitary constellation and mapping rule. Design criterion regarding the choice of unitary constellation and mapping is then established to achieve the best asymptotic performance. Furthermore, using the unitary constellation obtained from orthogonal design and 4-PSK, two mapping rules are proposed. In particular, one mapping is the best mapping for systems with iterative decoding, whereas the other mapping is most suitable for systems that do not implement iteration process. The latter mapping is similar to Gray mapping considered for coherent channels. Analytical and simulation results show that with the proposed mapping of the unitary constellation obtained from orthogonal design, the error performance of the iterative systems can approach very near the performance of the ideal unitary constellation and mapping.

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Unitary space-time modulation for multiple-antenna communications in Rayleigh flat fading

Cited by 906 publications

References 16 publications

Cyclic Division Algebras: A Tool for Space-Time Coding

Cyclic Division Algebras: A Tool for Space-Time Coding

Iterative receiver design for general nonorthogonal unitary space-time constellations

Tight error bound for coded unitary space-time modulation

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