Inter-cell interference nulling with bit partitioning for extended Clarke's modelled multi-cell wireless networks

Balaji, S.; Santhakumar, R.; Nithiyandan, L; Mallick, PS

doi:10.7158/e12-187.2013.10.4

Cited by 3 publications

(3 citation statements)

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“…Adaptive partitioning of bits for interference minimization in multiantenna systems is stuied in Bhagavatula and Heath, 10 and partitioning of bits is extended to TVCs in recent past to quantify the throughput. 11 Adaptive bit partitioning for interfering broadcast channel (IFBC) is considered in Lee and Shin. 12 The interference management in random clustering with adaptive bit partitioning is discussed in detail.…”

Section: Discussionmentioning

confidence: 99%

“…The scaling law of bits in Equation 11 is now a function of fading correlation coefficient, ie, to maintain a constant rate loss, the total power received including IUI Power and ICI power from all cells to be scaled appropriately. In the numerical simulation section, we illustrate the actual throughput performance with increasing number of bits.…”

Section: Proof See Appendix Cmentioning

confidence: 99%

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Performance analysis of adaptive limited feedback coordinated zero‐forcing multicell systems in time‐varying channels: A practical approach

Balaji

Mallick

2017

Int J Communication

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In this paper, coordinated limited feedback zero-forcing beamforming multicell system in time-varying channel is studied. In time-varying channels, the actual rate loss arising from error in channel quantization of both interuser and intercell inferences is quantified in this work. Using the actual degradation of rate loss, a limited feedback bit allocation is proposed to reduce interuser and intercell interference simultaneously with feedback update period as one of the parameters. Furthermore, the scaling law of bits required to maintain a constant rate loss is formulated in varying channel conditions for a given feedback update period. Simulation results demonstrated the practical feedback requirement in multicell systems in the presence of both intercell and interuser interference over conventional schemes to maintain a constant rate offset. The key finding from the proposed feedback allocation is that practically much higher allocation of feedback bits and feedback scaling are required in time-varying channels to reduce throughput degradation.

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Section: Discussionmentioning

confidence: 99%

Section: Proof See Appendix Cmentioning

confidence: 99%

Performance analysis of adaptive limited feedback coordinated zero‐forcing multicell systems in time‐varying channels: A practical approach

Balaji

Mallick

2017

Int J Communication

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“…Moreover by including the backhaul delay and interference signal strength, the BS cooperation can drastically improve the average sum-rate over the equal bit partitioning scheme [6]. In [7], using the component phase fluctuations of channel, the variation of ICI and IUI feedback in multi-cell systems with RVQ have been proposed. A comparison between multi-cell system and point to point system is made while proving that the feedback rate in multipoint system should be linearly scaled with SNR.…”

Section: Introductionmentioning

confidence: 99%

Threshold Based Limited Feedback Bit Partitioning for Interference Channels in Multicell Systems

Balaji¹,

Mallick²,

Gnanagurunathan³

2016

JESTR

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In this paper feedback allocation of interference channels using multi-cell coordinated beamforming is studied. By fixing the total feedback budget as constant, the proposed interference grading threshold scheme adaptively allocating the feedback bits between inter-user interference and inter-cell interference. The individual feedback bits of inter-user and inter-cell interference are calculated by employing interference grading. A new iterative algorithm is proposed to find the total residual feedback bits. The proposed feedback allocation in interfering broadcast and time varying channels are numerically evaluated and it is found that the proposed method performs comparatively better than other counterparts.

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On the Optimality of Multi-User Coordinated Zero-Forcing Beamforming Multicell Systems with Limited Feedback in Interference Channels

Balaji

Mallick

2017

Wireless Pers Commun

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Inter-cell interference nulling with bit partitioning for extended Clarke's modelled multi-cell wireless networks

Cited by 3 publications

References 0 publications

Performance analysis of adaptive limited feedback coordinated zero‐forcing multicell systems in time‐varying channels: A practical approach

Performance analysis of adaptive limited feedback coordinated zero‐forcing multicell systems in time‐varying channels: A practical approach

Threshold Based Limited Feedback Bit Partitioning for Interference Channels in Multicell Systems

On the Optimality of Multi-User Coordinated Zero-Forcing Beamforming Multicell Systems with Limited Feedback in Interference Channels

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