Uplink analysis of large MU-MIMO systems with space-constrained arrays in Ricean fading

Tataria, Harsh; Smith, Peter J.; Matthaiou, Michail; Dmochowski, Pawel A.

doi:10.1109/icc.2017.7996528

Cited by 17 publications

(12 citation statements)

References 18 publications

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“…Indeed, such procedure is applicable for fast fading (timely heterogeneous) channels, aimed at synchronising (coupling) all the chaos; something that is efficiently compatible with the fast fading–based models . () This is a general realisation of the theorem tensorisation of relative entropy .…”

Section: Our Proposed Solutionmentioning

confidence: 80%

Probabilistic‐based secrecy rate maximisation for MIMOME wiretap channels: Towards novel convexification procedures—Part II

Zamanipour¹

2018

Trans Emerging Tel Tech

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This paper extends our previous work on multiple‐input–multiple‐output multiantenna eavesdropper–based wiretap channels aimed at fundamentally proposing optimally secure frameworks. This extension is appropriately conducted providing 2 newly asymptotic bounds for the secrecy outage capacity. Such proposed schemes should be necessarily taken into consideration owing to channel uncertainty sets in relation to the eavesdropping fusion center. Our first resultant closed‐form solution, which is mathematically performed according to Hanson‐Wright inequality, is totally tight as well; something that can be technically assigned to other ergodicity‐driven equilibria. Specifically, our solution's outperformance is highlighted with regard to a significantly more adequate secrecy capacity in the low signal‐to‐noise‐ratio regime. Such outperformance is efficiently guaranteed due to assigning optimally convex paradigms regarding the concentration‐of‐measure‐based inequality aforementioned. Additionally, our framework has a markedly acceptable computational complexity compared with our previous work. The latter characteristic is straightforwardly highlighted in parallel with a considerably acceptable computational error as well. Finally, we optimally generalise our framework to dynamically fast fading processes in terms of the secondly closed‐form asymptotic bound. At the end of the discussion, simulation‐based analytical results principally authenticate our contribution's efficiency and tightness.

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Section: Our Proposed Solutionmentioning

confidence: 80%

Probabilistic‐based secrecy rate maximisation for MIMOME wiretap channels: Towards novel convexification procedures—Part II

Zamanipour¹

2018

Trans Emerging Tel Tech

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“…As a consequence, the effects of wavefront curvature start to vary not only the phases of the MPCs but also the amplitudes over the array size. To this end, the effectiveness of channel hardening and favorable propagation-two pillars of massive MIMO channelsstarts to lose effect leading to increased variability in channel statistics [156], [157]. Second, any propagation model to/from ultramassive MIMO arrays needs to be directly linked to the physics of near-field propagation to compute the near-field channel impulse response.…”

Section: Ultramassive Mimo Propagation Channelsmentioning

confidence: 99%

6G Wireless Systems: Vision, Requirements, Challenges, Insights, and Opportunities

Shafi²,

et al. 2021

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Mobile communications have been undergoing a generational change every ten years or so. However, the time difference between the so-called "G's" is also decreasing.While fifth-generation (5G) systems are becoming a commercial reality, there is already significant interest in systems beyond 5G, which we refer to as the sixth generation (6G) of wireless systems. In contrast to the already published papers on the topic, we take a top-down approach to 6G. More precisely, we present a holistic discussion of 6G systems beginning with lifestyle and societal changes driving the need for next-generation networks. This is followed by a discussion into the technical requirements needed to enable 6G applications, based on which we dissect key challenges and possibilities for practically realizable system solutions across all layers of the Open Systems Interconnection stack (i.e., from applications to the physical layer). Since many of the 6G applications

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“…Here, the existence of FP has been demonstrated for channel models of increasing complexity, progressing from independent and identically distributed (i.i.d.) Rayleigh [2], [7], pure line-of-sight [2], [7], correlated Rayleigh [8], [9], and independent Ricean [10] to correlated Ricean channels [11], [12]. In parallel, with the theory, channel measurements have demonstrated that a large fraction of the theoretical gains due to FP can be obtained [13]- [15].…”

Section: Introductionmentioning

confidence: 99%

Massive MIMO Asymptotics for Ray-Based Propagation Channels

Smith

Dmochowski

et al. 2020

IEEE Trans. Wireless Commun.

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Favorable propagation (FP) and channel hardening (CH) are desired properties in massive multiple-input multipleoutput (MIMO) systems. To date, these properties have primarily been analyzed for classical statistical channel models, or ray-based models with very specific angular parameters and distributions. This paper presents a thorough mathematical analysis of the asymptotic system behavior for ray-based channels with arbitrary ray distributions, and considers two types of antenna array structures at the cellular base station: a uniform linear array (ULA) and a uniform planar array (UPA). In addition to FP and channel hardening, we analyze the large system potential (LSP) which measures the asymptotic ratio of the expected power in the desired channel to the expected total interference power when both the antenna and user numbers grow. LSP is said to hold when this ratio converges to a positive constant. The results demonstrate that while FP is guaranteed in ray-based channels, CH may or may not occur depending on the nature of the model. Furthermore, we demonstrate that LSP will not normally hold as the expected interference power grows logarithmically for both ULAs and UPAs relative to the power in the desired channel as the system size increases. Nevertheless, we identify some fundamental and attractive properties of massive MIMO in this limiting regime.

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Uplink analysis of large MU-MIMO systems with space-constrained arrays in Ricean fading

Cited by 17 publications

References 18 publications

Probabilistic‐based secrecy rate maximisation for MIMOME wiretap channels: Towards novel convexification procedures—Part II

Probabilistic‐based secrecy rate maximisation for MIMOME wiretap channels: Towards novel convexification procedures—Part II

6G Wireless Systems: Vision, Requirements, Challenges, Insights, and Opportunities

Massive MIMO Asymptotics for Ray-Based Propagation Channels

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