Transmission Cooperative Strategies for MIMO-OFDM Heterogeneous Networks

Castanheira, Daniel; Silva, Adão; Ali, Syed Saqlain; Gameiro, Atílio

doi:10.13164/re.2015.0431

Cited by 4 publications

(25 citation statements)

References 31 publications

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“…First, we describe the signal model for the macro-and small-cell systems for the case where no SFBC is employed at the MBS [23]. The block diagram of the considered systems is presented in Figure 2.…”

Section: Signal Model Without Sfbcmentioning

confidence: 99%

“…the channels between the SBSs and the MUE) and the zero-mean white Gaussian noise with variance σ 2 , respectively [23]. We assume that at the MBS only G f n 1 is known and it has no knowledge about the existence of a small-cell system.…”

Section: Signal Model Without Sfbcmentioning

confidence: 99%

“…Therefore, in Ref. [23] we proposed IA-based schemes for the downlink of heterogeneous systems under limited inter-system information exchange. In Ref.…”

Section: Introductionmentioning

confidence: 99%

“…In Ref. [23], we design a new IA-based scheme for the considered heterogeneous systems. Namely, the coordinated 2n-bit approach, which is an extension of the 2-bit method proposed in Ref.…”

Section: Introductionmentioning

confidence: 99%

“…In this chapter, we present the schemes mentioned in Refs. [23,25] for a general number of antennas at each terminals and for the case where OFDM modulation is considered. Furthermore, for our SFBC-based schemes, we consider a general formulation of the diversity-oriented joint IA and SFBC method that can be applied for any SFBC.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Physical-Layer Transmission Cooperative Strategies for Heterogeneous Networks

Ali¹,

Castanheira²,

Silva³

et al. 2016

Towards 5G Wireless Networks - A Physical Layer Perspective

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The deployment of small cells within the boundaries of a macro-cell is considered to be an effective solution to cope with the current trend of higher data rates and improved system capacity. In the current heterogeneous configuration with the mass deployment of small cells, it is preferred that these two cell types coexist over the same spectrum, because acquiring additional spectrum licenses for small cells is difficult and expensive. However, the coexistence leads to cross-tier/inter-system interference. In this context, this contribution investigates interference alignment (IA) methods in order to mitigate the interference of macro-cell base station towards the small cell user terminals. More specifically, we design a diversity-oriented interference alignment scheme with spacefrequency block codes (SFBC). The main motivation for joint interference alignment with SFBC is to allow the coexistence of two systems under minor inter-system information exchange. The small cells just need to know what space-frequency block code is used by the macro-cell system and no inter-system channels need to be exchanged, contrarily to other schemes recently proposed. Numerical results show that the proposed method achieves a performance close to the case where full-cooperation between the tiers is allowed.

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Section: Signal Model Without Sfbcmentioning

confidence: 99%

Section: Signal Model Without Sfbcmentioning

confidence: 99%

“…Therefore, in Ref. [23] we proposed IA-based schemes for the downlink of heterogeneous systems under limited inter-system information exchange. In Ref.…”

Section: Introductionmentioning

confidence: 99%

“…In Ref. [23], we design a new IA-based scheme for the considered heterogeneous systems. Namely, the coordinated 2n-bit approach, which is an extension of the 2-bit method proposed in Ref.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Physical-Layer Transmission Cooperative Strategies for Heterogeneous Networks

Ali¹,

Castanheira²,

Silva³

et al. 2016

Towards 5G Wireless Networks - A Physical Layer Perspective

View full text Add to dashboard Cite

show abstract

Joint IA and SFBC Macrocells and Small-Cells Coexistence under Minor Information Exchange

Ali

Castanheira

Silva

et al. 2016

Mobile Information Systems

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The deployment of small-cells within the boundaries of a macrocell is considered to be an effective solution to cope with the current trend of higher data rates and improved system capacity. In the current heterogeneous configuration with the mass deployment of small-cells, it is preferred that these two cell types will coexist over the same spectrum, because acquiring additional spectrum licenses for small-cells is difficult and expensive. However, the coexistence leads to cross-tier/intersystem interference. In this context, this contribution investigates interference alignment (IA) methods in order to mitigate the interference of macrocell base station towards the small-cell user terminals. More specifically, we design a diversity-oriented interference alignment scheme with space-frequency block codes (SFBCs). The main motivation for joint interference alignment with SFBC is to allow the coexistence of two systems under minor intersystem information exchange. The small-cells just need to know what space-frequency block code is used by the macrocell system and no intersystem channels need to be exchanged, contrarily to other schemes recently proposed. Numerical results show that the proposed method achieves a performance close to the case where full cooperation between the tiers is allowed.

show abstract