2006
DOI: 10.1109/jsac.2005.858890
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Covariance-based linear precoding

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Cited by 18 publications
(5 citation statements)
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“…Considering the case of β ⊥ τ → 0, (33) immediately gives t ⋆ → ∞. Applying this result into (29) gives:…”
Section: A Lower Bounds Of the Mf Beamforming Gainmentioning
confidence: 92%
See 1 more Smart Citation
“…Considering the case of β ⊥ τ → 0, (33) immediately gives t ⋆ → ∞. Applying this result into (29) gives:…”
Section: A Lower Bounds Of the Mf Beamforming Gainmentioning
confidence: 92%
“…where λ n (> 0) (n = 0, ..., N − 1) are the singular-values of H. For practical massive-MIMO systems, SVD is a highcomplexity algorithm, and the matched-filter (MF) is often employed as a low-complexity alternative (e.g., [29], [30]). Conventional throughput-oriented MF beamforming often superimposes multiple data-streams for better spectral efficiency.…”
Section: B Problem Statementmentioning
confidence: 99%
“…Therefore, much research effort has been directed at reducing the feedback CI. Some of the proposed approaches include quantization of the CI [14], representation of the CI using a codebook of finite codewords or derivation of precoders by utilizing partial CI [22] such as channel correlation [23], covariance [24], or mean [25].…”
Section: Precoding Matrix Selection Methodsmentioning
confidence: 99%
“…Iin FDD-UMTS (WCDMA) [1] the receivers' channel estimates ("phase references") are typically based on a common pilot sequence, which is designated for all receivers (see [2] and [3] for details). There is a 'primary common pilot" transmitted to all users in the sector and "secondary common pilots" transmitted over a fixed grid-of-beams to exploit the antenna gain.…”
Section: Introductionmentioning
confidence: 99%
“…A first approach to this problem was given by [3] based on sum MSE, where the matched filter (Rake receiver) at the receiver and its incomplete CSI from the common pilot channel was modeled explicitly. Another adaptive precoding is mentioned in [2] but not explained in detail, which shows significant gains in cell capacity over a fixed-beam approach and an adaptive precoding using the dedicated pilot sequence.…”
Section: Introductionmentioning
confidence: 99%