Super-orthogonal space-time codes with rectangular constellations and two transmit antennas for high data rate wireless communications

Sterian, Corneliu Eugen D.; Singh, Harvinder; Pätzold, Matthias; Hogstad, B.O.

doi:10.1109/twc.2006.1673097

Cited by 10 publications

(22 citation statements)

References 26 publications

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“…To decode the space‐frequency code, the Viterbi algorithm is applied as in . More precisely, the branch metric B M n for two receive antennas is given as

\begin{matrix} B M_{n} & = {|R_{2 n}^{(1)} - h_{n}^{(1, 1)} \cdot s_{2 n} + a_{n} \cdot h_{n}^{(1, 2)} \cdot s_{2 n + 1}^{*}|}^{2} \\ + {|R_{2 n + 1}^{(1)} - h_{n}^{(1, 1)} \cdot s_{2 n + 1} - a_{n} \cdot h_{n}^{(1, 2)} \cdot s_{2 n}^{*}|}^{2} \\ + {|R_{2 n}^{(2)} - h_{n}^{(2, 1)} \cdot s_{2 n} + a_{n} \cdot h_{n}^{(2, 2)} \cdot s_{2 n + 1}^{*}|}^{2} \\ + |R_{2 n + 1}^{(2)} - h_{n}^{(2, 1)} \cdot s_{2 n + 1} - a_{n} \cdot h_{n}^{}| \end{matrix}

…”

Section: Receiver Issuesmentioning

confidence: 99%

“…Several space-time and space-frequency coded schemes are proposed and analysed in [17][18][19]. The theory of superorthogonal space-time trellis coding for QAM is described in [12,13,20].…”

Section: Super-orthogonal Space-time Trellis Codingmentioning

confidence: 99%

“…To decode the space-frequency code, the Viterbi algorithm is applied as in [12,13]. More precisely, the branch metric BM n for two receive antennas is given as…”

Section: Receiver Of the New Systemmentioning

confidence: 99%

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Combining super‐orthogonal space‐frequency trellis coding, constellation shaping by shell mapping, and OFDM for high data rate broadband mobile communications

Vlădeanu

Bănică

Hogstad

et al. 2014

Trans. Emerging Tel. Tech.

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In this paper, we seamlessly combine three transmission techniques to design an improved performance broadband mobile communication system with two transmit antennas. In so doing, we took inspiration from the V.34 data modem toolbox designed for public switched telephone network. We modified the constellation shaping by shell mapping algorithm to apply it only to the orthogonal frequency division multiplexing (OFDM) frame sent by the first antenna, in such a way that the peak‐to‐average power ratio (PAPR) is also reduced for the second antenna. We use a 24‐point quadrature amplitude modulation (QAM) signal constellation on each subcarrier, while the reference system employs 16 QAM for the same data rate. The 24 QAM constellation is partitioned into four subsets and six rings of four two‐dimensional points each. Two adjacent OFDM frequencies form with the symbols transmitted on them the entries of a 2 × 2 matrix similar to Alamouti's scheme. Two rings corresponding to adjacent OFDM frequencies form a super‐ring. The constellation shaping algorithm is applied to shells made up of super‐rings instead of rings as usual. Super‐orthogonal space‐frequency trellis coding is used on pairs of subcarriers. The proposed system was simulated using two channel models, and the performance was evaluated against the uncoded OFDM reference system. It has both reduced PAPR, and better bit error rate and frame error rate performances. Copyright © 2014 John Wiley & Sons, Ltd.

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“…To decode the space‐frequency code, the Viterbi algorithm is applied as in . More precisely, the branch metric B M n for two receive antennas is given as

\begin{matrix} B M_{n} & = {|R_{2 n}^{(1)} - h_{n}^{(1, 1)} \cdot s_{2 n} + a_{n} \cdot h_{n}^{(1, 2)} \cdot s_{2 n + 1}^{*}|}^{2} \\ + {|R_{2 n + 1}^{(1)} - h_{n}^{(1, 1)} \cdot s_{2 n + 1} - a_{n} \cdot h_{n}^{(1, 2)} \cdot s_{2 n}^{*}|}^{2} \\ + {|R_{2 n}^{(2)} - h_{n}^{(2, 1)} \cdot s_{2 n} + a_{n} \cdot h_{n}^{(2, 2)} \cdot s_{2 n + 1}^{*}|}^{2} \\ + |R_{2 n + 1}^{(2)} - h_{n}^{(2, 1)} \cdot s_{2 n + 1} - a_{n} \cdot h_{n}^{}| \end{matrix}

…”

Section: Receiver Issuesmentioning

confidence: 99%

“…Several space-time and space-frequency coded schemes are proposed and analysed in [17][18][19]. The theory of superorthogonal space-time trellis coding for QAM is described in [12,13,20].…”

Section: Super-orthogonal Space-time Trellis Codingmentioning

confidence: 99%

See 1 more Smart Citation

Combining super‐orthogonal space‐frequency trellis coding, constellation shaping by shell mapping, and OFDM for high data rate broadband mobile communications

Vlădeanu

Bănică

Hogstad

et al. 2014

Trans. Emerging Tel. Tech.

View full text Add to dashboard Cite

show abstract

“…The partitioning of a 2D rectangular signal constellation for use on mobile fading channels was explained in previous papers [11,12]. In short, the signal constellations illustrated in Figs.…”

Section: Partition Of Signal Constellations For 4 Bits Per Signaling mentioning

confidence: 99%

“…While an appropriate partitioning technique was known for phaseshift keying (PSK) [9], a novel technique for quadrature amplitude modulation (QAM) was revealed in [10] for single-input single-output wireless links and extended later in [11] w.r.t. ST trellis coding schemes, as well as SOSTTCs in [12]. The excellent performance of SOSTTCs for both PSK and QAM is the key reason to contemplate enlarging the transmit diversity gain.…”

Section: Introductionmentioning

confidence: 99%

Super-quasiorthogonal space-time trellis codes for four transmit antennas with rectangular signal constellations

Sterian

Pätzold

2008

Ann. Telecommun.

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In this paper, we present the first superquasiorthogonal space-time trellis codes (SQOSTTCs) for systems with four transmit antennas using various types of rectangular signal constellations to increase the spectral efficiency up to 5 bits/s/Hz. In our wireless communications system, we define an eightdimensional (8D) signal constellation as Cartesian product of four two-dimensional (2D) rectangular signal sets. The transmission of an 8D point from the first antenna is achieved by transmitting four concatenated 2D points in four consecutive channel uses. The 2D symbols transmitted from the other three antennas are not independent but so chosen as to form, together with the symbols transmitted from the first antenna, the entries of a 4 × 4 quasiorthogonal transmission matrix. The union of two sets of quasiorthogonal transmission matrices forms a so-called super-quasiorthogonal signal set. With the 4 × 4 quasiorthogonal transmission matrices, we then label the state transitions of a trellis diagram describing the operation of the encoder. The simulation results of the frame error rate and the bit error rate demonstrate the excellent performance of our proposed SQOSTTCs.

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New super‐orthogonal space‐time trellis codes with 32QAM and two transmit antennas for five bits per signalling interval

Sterian

Linga

Singh

et al. 2006

Trans Emerging Tel Tech

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SUMMARYIn this paper, we focus on the design of super-orthogonal space-time (ST) trellis codes with a 32-point quadrature amplitude modulation (QAM) signal constellation, allowing wireless communication with a data rate of 5 bits per signalling interval. Considering a mobile wireless communications system with two transmit antennas, we form a four-dimensional (4D) signal constellation as a Cartesian product of two 2D rectangular signal sets. The first antenna transmits a 4D point as two concatenated 2D points in two consecutive baud intervals. The 2D symbols transmitted by the second antenna are not independent, but so chosen as to form, together with the symbols transmitted by the first antenna, the entries of a 2 Â 2 orthogonal matrix. For a rectangular constellation, as much as four sets of 2 Â 2 orthogonal matrices can be built. To obtain a higher data rate, the union of two of them is used to construct a super-orthogonal signal set. With 2 Â 2 orthogonal matrices, we then label the state transitions of a trellis diagram describing the operation of the encoder. For the performance analysis, two different channel models are employed. The first channel model is based on the assumption that the paths between different pairs of transmit-receive antennas are uncorrelated, while the second model takes into account the effect of spatial antenna correlation at both the base station (BS) and at the mobile station (MS). The analysis of the frame-error rate (FER) and the bit-error rate (BER) demonstrates the excellent performance of the proposed high data rate super-orthogonal ST trellis code.

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Super-orthogonal space-time codes with rectangular constellations and two transmit antennas for high data rate wireless communications

Cited by 10 publications

References 26 publications

Combining super‐orthogonal space‐frequency trellis coding, constellation shaping by shell mapping, and OFDM for high data rate broadband mobile communications

Combining super‐orthogonal space‐frequency trellis coding, constellation shaping by shell mapping, and OFDM for high data rate broadband mobile communications

Super-quasiorthogonal space-time trellis codes for four transmit antennas with rectangular signal constellations

New super‐orthogonal space‐time trellis codes with 32QAM and two transmit antennas for five bits per signalling interval

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