2013
DOI: 10.1109/tit.2013.2283077
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Toward the Performance Versus Feedback Tradeoff for the Two-User MISO Broadcast Channel

Abstract: For the two-user MISO broadcast channel with imperfect and delayed channel state information at the transmitter (CSIT), the work explores the tradeoff between performance on the one hand, and CSIT timeliness and accuracy on the other hand. The work considers a broad setting where communication takes place in the presence of a random fading process, and in the presence of a feedback process that, at any point in time, may provide CSIT estimates -of some arbitrary accuracy -for any past, current or future channe… Show more

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Cited by 50 publications
(76 citation statements)
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“…In the second example -where CSIT has a periodic structure -the two phases are jointly performed in the same communication block, and this block is repeated many times, in a block Markov manner where the multicasting phase in one block is designed to aid for the overloading phase from the previous block. This sequence follows closely from the scheme in [14] that considered a similar setting without though any topology considerations (α = 1).…”
Section: ) Achieving Gdofmentioning
confidence: 68%
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“…In the second example -where CSIT has a periodic structure -the two phases are jointly performed in the same communication block, and this block is repeated many times, in a block Markov manner where the multicasting phase in one block is designed to aid for the overloading phase from the previous block. This sequence follows closely from the scheme in [14] that considered a similar setting without though any topology considerations (α = 1).…”
Section: ) Achieving Gdofmentioning
confidence: 68%
“…Such overload-multicast strategy was explored in different settings, including in [30] for the heterogeneous parallel channel with delayed CSIT. It is worth noting that one of the main differences between the new schemes, and the older schemes by Tandon et al [15] as well as the schemes from the general CSIT setting in [14] -and by extension, the difference between the new schemes here and other blockMarkov related schemes [41]- [45] (see also [46], [47]) -relates the new schemes' ability to properly capitalize on the inherent weakness of a link in order to (often optimally) reduce interference in at least one direction.…”
Section: Topological Signal Management Schemes For Static Topologmentioning
confidence: 97%
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“…The range of interest 1 is α ∈ [0, 1]. We also assume availability of delayed CSIT (as in for example [6], as well as in a variety of subsequent works [2], [3], [7]- [14], see also [15]- [18] as well as [19]- [21]) where now the delayed estimates of any channel, can be received without error but with arbitrary delay, even if this delay renders this CSIT completely obsolete. As it is argued in [2], this mixed CSI model (partial current CSIT, and delayed CSIT) nicely captures different realistic settings that might involve channel correlations and an ability to improve CSI as time progresses.…”
Section: B Coded Caching and Csit-type Feedbackmentioning
confidence: 99%
“…On the other hand, CSI inaccuracies also result from the delay of the feedback path, leading to a mismatch of the CSI experienced during the quantization phase and the CSI valid during transmission. Several theoretical studies exist that evaluate the performance degradation due to imperfect and outdated CSIT for a variety of transmission scenarios [24][25][26][27].…”
Section: Introductionmentioning
confidence: 99%