Space-frequency-time coded OFDM for broadband wireless communications

Gong, Yi; Letaief, K.B.

doi:10.1109/glocom.2001.965171

Cited by 58 publications

(36 citation statements)

References 8 publications

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“…If the minimum rank of is for any pair of distinct codewords and , we say that the SF code achieves a diversity order of . According to a rank inequality on Hadamard products ([50, p. 307]), we know that Since the rank of is at most , the rank of is at most , and the rank of is at most , the maximum achievable diversity (or full diversity) is at most [26], [27], [29], [30]. Clearly, in order to achieve a diversity order of , the number of nonzero rows of cannot be less than for any pair of distinct SF codewords and .…”

Section: Channel Model and Sf Code Design Criteriamentioning

confidence: 99%

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Full-rate full-diversity space-frequency codes with optimum coding advantage

Safar

Liu

2005

IEEE Trans. Inform. Theory

200

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Abstract-In this paper, a general space-frequency (SF) block code structure is proposed that can guarantee full-rate (one channel symbol per subcarrier) and full-diversity transmission in multiple-input multiple-output-orthogonal frequency-division multiplexing (MIMO-OFDM) systems. The proposed method can be used to construct SF codes for an arbitrary number of transmit antennas, any memoryless modulation and arbitrary power-delay profiles. Moreover, assuming that the power-delay profile is known at the transmitter, we devise an interleaving method to maximize the overall performance of the code. We show that the diversity product can be decomposed as the product of the "intrinsic" diversity product, which depends only on the used signal constellation and the code design, and the "extrinsic" diversity product, which depends only on the applied interleaving method and the power delay profile of the channel. Based on this decomposition, we propose an interleaving strategy to maximize the "extrinsic" diversity product. Extensive simulation results show that the proposed SF codes outperform the previously existing codes by about 3-5 dB, and that the proposed interleaving method results in about 1-3-dB performance improvement compared to random interleaving.Index Terms-Frequency-selective fading channels, full diversity, multiple-input multiple-output-orthogonal frequency-division multiplexing (MIMO-OFDM) systems, permutation, spacefrequency (SF) coding.

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Section: Channel Model and Sf Code Design Criteriamentioning

confidence: 99%

“…The strategy of SF coding is to distribute the channel symbols over different transmit antennas and OFDM tones within one OFDM block. If longer decoding delay and higher decoding complexity are allowable, one may consider coding over several OFDM block periods, resulting in space-time-frequency codes [30], [31].…”

Section: Introductionmentioning

confidence: 99%

Full-rate full-diversity space-frequency codes with optimum coding advantage

Safar

Liu

2005

IEEE Trans. Inform. Theory

200

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“…Motivated by the adlined are vectors. ditional diversity branches in broadband multipath channels, space-frequency (SF) and STF coding that exploits space and multipath diversity is proposed in [4]- [6]. How-2 System Model ever, their maximum performance gain is only achievable in spatial uncorrelated channels.…”

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confidence: 99%

Performance of STF Coded OFDM with Transmit Eigenbeamforming in Correlated Fading Channels

Lin

Hussain

2006

2006 Asia-Pacific Conference on Communications

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“…While the combination of OFDM, MIMO and STCs, which is referred to as Space-Time-Frequency Coded MIMO-OFDM (STFC-MIMO-OFDM), has been well examined in the literature [7], [8], [9], the combination of MB-OFDM UWB, MIMO, and STCs has been sparsely examined with only few published papers, such as [10], [11].…”

Section: Introductionmentioning

confidence: 99%