Transmitter diversity with antenna hopping for wireless communication systems

Olofsson, H.; Almgren, Magnus; Hook, M.

doi:10.1109/vetec.1997.605857

Cited by 32 publications

(4 citation statements)

References 7 publications

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“…For M t ≥ 3, we employ the orthogonalization process on the column pairs (i, j) of the channel matrix H in the order of (1, 2), (2,3), · · · , (M t − 1, M t ), (M t , 1), which is called a sweep cycle. Therefore, one sweep cycle involves the orthogonalization of M t columns pairs.…”

Section: Transmit Beamforming Based On Rotation Transformationsmentioning

confidence: 99%

“…In open-loop systems where channel state information (CSI) is known only at the receiver, a number of techniques exist for achieving the diversity gain from the transmit antennas such as antenna hopping [3] and space-time block coding [4]. Time diversity can be created by inducing spatial selectivity in the case of the antenna hopping scheme, where a bit-interleaved coded modulation (BICM) structure [5] is used to obtain the diversity gain.…”

Section: Introductionmentioning

confidence: 99%

“…The basic concept is similar to the antenna hopping scheme [3] which makes an artificial time selective channel over flat fading channels. In order to generate time selectivity, our proposed scheme adopts the predetermined set of the precoding weight vectors known at both the transmitter and receiver.…”

Section: Introductionmentioning

confidence: 99%

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A New Transmit Diversity Scheme based on Cyclic Precoding Vectors for Flat Fading Channels

Lee

Park

et al. 2007

2007 IEEE 65th Vehicular Technology Conference - VTC2007-Spring

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In this paper, we propose a new transmit diversity technique for multiple-input multiple-output (MIMO) systems to improve the link level performance of open-loop systems over flat fading channels. By cyclically applying a predetermined set of precoding weight vectors, artificially induced fluctuation is created to achieve additional diversity gain in flat fading channels. To design the set of the precoding vectors, we exploit the knowledge on the distribution of near optimum precoding vectors observed in a beamforming scheme based on the rotation transformations. Simulation results demonstrate that the proposed open-loop diversity scheme with an arbitrary number of transmit antennas achieves a full diversity gain with computational complexity comparable to a single-input single-output (SISO) system.

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Section: Transmit Beamforming Based On Rotation Transformationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A New Transmit Diversity Scheme based on Cyclic Precoding Vectors for Flat Fading Channels

Lee

Park

et al. 2007

2007 IEEE 65th Vehicular Technology Conference - VTC2007-Spring

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“…However its applicability to terminals is limited by cost, size and power consumption. There have been many proposals of transmit diversity schemes including, space time block and trellis codes [24], delay diversity [5], phase hopping [6] and an- [7]. etc.…”

Section: Introductionmentioning

confidence: 99%

MLSE receiver with bi-directional extended window for EDGE systems using STBC in frequency-selective fading channels

Wang²

The 13th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications

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For EDGE systems with transmit diversity in fiquency-selective channels, the orthogonality of space time block codiig (STBC) is ruined by the delay spreads of multipath channels and the interference is enhanced by the multi-antenna transmission respectively. The enhanced cochannel and co-antenna interference cannot be suppressed by the conventional equalization. In this paper a maximum l i elihood sequence estimation (MLSE) receiver with a bidirectional extended window and multistage processing is proposed to restore the diversity gain. The window is initiated from the known midamble and alternate extended to backward and forward data slots by the step equals to the STBC block size. Only new symbols included in the window are estimated by the MLSE and then the bidirectional window is M e r extended until all the data burst are estimated. The numerical results show that the proposed scheme can efficiently suppress the CO-antenna interference and restore the transmit diversity.

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A Kind of Quasi-Orthogonal Space-Time Block Code and its Decoding Methods

Zhao

2006

The Journal of China Universities of Posts and Telecommunicatio

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Transmitter diversity with antenna hopping for wireless communication systems

Cited by 32 publications

References 7 publications

A New Transmit Diversity Scheme based on Cyclic Precoding Vectors for Flat Fading Channels

A New Transmit Diversity Scheme based on Cyclic Precoding Vectors for Flat Fading Channels

MLSE receiver with bi-directional extended window for EDGE systems using STBC in frequency-selective fading channels

A Kind of Quasi-Orthogonal Space-Time Block Code and its Decoding Methods

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