On Channel Orthogonalization Using Space–Time Block Coding With Partial Feedback

Milleth, J. Klutto; Giridhar, K.; Jalihal, Devendra

doi:10.1109/tcomm.2006.876876

Cited by 18 publications

(11 citation statements)

References 32 publications

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“…We also include the performance of the closed-loop scheme proposed in [1], where 2 bits are sent back to the transmitter in order to switch-off two out of the four antennas and then apply equal power allocation in the rest (CL-J, CL-TBH, CL-PF). On the same axis, the BER curve of the channel-orthogonalized scheme proposed in [2], that requires 1 real feedback for phase rotation, is also plotted (CO-J, CO-TBH, CO-PF). Finally, the BER curves of the half-rate orthogonal code (OSTBC1/2) [13] and the 3/4 orthogonal code (OSTBC3/4) [14] are used as a reference, for spectral efficiencies equal to 2 and 3 b/s/Hz, respectively.…”

Section: Simulation Resultsmentioning

confidence: 99%

“…In this paper we prove that this power allocation strategy is not optimal in terms of system performance. Additionally, a phase-rotation technique for orthogonalizing the quasi-orthogonal equivalent channel matrix under the requirement of 1 real quantity to be fed back to the transmitter, is developed in [2].…”

Section: Introductionmentioning

confidence: 99%

“…The entries of set S include now the indices of the partitioned (block) rows that are to be complex conjugated 2. For the QOSTBC case, the condition Nt (mod n) = 0 is obviously satisfied.…”

mentioning

confidence: 99%

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Power Allocation for Quasi-Orthogonal Space-Time Block Codes with 1 or 2 Bits Feedback

Kapinas

Paraforou

Liondas

et al. 2010

2010 IEEE International Conference on Communications

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In this paper, a closed-loop wireless communication system employing Quasi-Orthogonal Space-Time Block Codes (QOSTBCs) is presented, where the total available power can be suitably allocated to the four transmit antennas, considering a very low-complexity decoding scheme at the receiver side. After deriving a particular optimization problem concerning the optimal choice of the power weights, we prove that the best strategy in terms of error probability is to switch-off three out of the four transmit antennas under the requirement of symbolby-symbol maximum-likelihood decoding (MLD). Our proposed scheme requires a very low-data rate dedicated feedback link, since just one or two bits per block are sufficient for outperforming other existing closed-loop systems. The technique applies to all the well-known QOSTBCs with arbitrary number of receive antennas, while some special cases are taken indicatively for illustration purposes.

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Section: Simulation Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Power Allocation for Quasi-Orthogonal Space-Time Block Codes with 1 or 2 Bits Feedback

Kapinas

Paraforou

Liondas

et al. 2010

2010 IEEE International Conference on Communications

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“…Due to space constraints, we skip the intermediate steps and present the final result of the derivation for maximum diversity gain max d in (13) as…”

Section: P(s → ŝ|Hmentioning

confidence: 99%

“…To improve Bit Error Rate (BER) performance of QOSTBC, optimum constellation rotation is proposed in [12]. In [13], a receive antenna selection scheme without feedback requirement for exploiting the advantages of MIMO is proposed. Cooperative diversity schemes for exploiting advantages of MIMO are proposed in [14][15][16][17][18][19][20] [21][22][23][24] for better performance.…”

Section: Introductionmentioning

confidence: 99%

On the performance of code word diversity based quasi orthogonal space time block codes in multiple-input-multiple-output systems

Kumaraswamy¹,

Manickavel²,

Valimohamad

et al. 2020

IJECE

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In the recent past, a lot of researches have been put into designing a Multiple-Input-Multiple-Output (MIMO) system to provide multimedia services with higher quality and at higher data rate. On par with these requirements, a novel Quasi Orthogonal Space Time Block Code (QOSTBC) scheme based on code word diversity is proposed, which is a multi-dimensional approach, in this paper. The term code word diversity is coined, since the information symbols were spread across many code words in addition to traditional time and spatial spreading, without increasing transmission power and bandwidth. The receiver with perfect channel state information estimates the transmitted symbols with less probability of error, as more number of samples is available to estimate given number of symbols due to the extra diversity due to code words. The simulation results show a significant improvement in the Bit Error Rate (BER) performance of the proposed scheme when compared with the conventional schemes.

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Beamforming with a Simple Adaptive Partial Feedback Method in Cooperative Cognitive Radio Networks

Asgarian

Shahtalebi

Sabahi

2017

Wireless Pers Commun

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On Channel Orthogonalization Using Space–Time Block Coding With Partial Feedback

Cited by 18 publications

References 32 publications

Power Allocation for Quasi-Orthogonal Space-Time Block Codes with 1 or 2 Bits Feedback

Power Allocation for Quasi-Orthogonal Space-Time Block Codes with 1 or 2 Bits Feedback

On the performance of code word diversity based quasi orthogonal space time block codes in multiple-input-multiple-output systems

Beamforming with a Simple Adaptive Partial Feedback Method in Cooperative Cognitive Radio Networks

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