Performance of an array receiver with a Kalman channel predictor for fast Rayleigh flat fading environments

Yan, Mingzhu; Rao, Bhaskar D.

doi:10.1109/49.926372

Cited by 12 publications

(1 citation statement)

References 24 publications

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“…In most practical systems, the transmitter and receiver nodes acquire and predict channel state information by employing predefined pilot sequences during the training phase, after which information symbols can be appropriately modulated and precoded at the transmitter and estimated at the receiver. Since the elapsed time between pilot transmissions and the transmit power level of pilot symbols have a large impact on the quality of channel estimation, a large number of papers investigated the optimal spacing and power control of pilot signals in both single and multiple antenna systems [1]- [12].…”

Section: Introductionmentioning

confidence: 99%

Optimizing Pilot Spacing in MU-MIMO Systems Operating Over Aging Channels

Fodor

Gürgünoğlu

et al. 2023

IEEE Trans. Commun.

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In the uplink of multiuser multiple input multiple output (MU-MIMO) systems operating over aging channels, pilot spacing is crucial for acquiring channel state information and achieving high signal-to-interference-plus-noise ratio (SINR). Somewhat surprisingly, very few works examine the impact of pilot spacing on the correlation structure of subsequent channel estimates and the resulting quality of channel state information considering channel aging. In this paper, we consider a fastfading environment characterized by its exponentially decaying autocorrelation function, and model pilot spacing as a sampling problem to capture the inherent trade-off between the quality of channel state information and the number of symbols available for information carrying data symbols. We first establish a quasiclosed form for the achievable deterministic equivalent SINR when the channel estimation algorithm utilizes multiple pilot signals. Next, we establish upper bounds on the achievable SINR and spectral efficiency, as a function of pilot spacing, which helps to find the optimum pilot spacing within a limited search space.Our key insight is that to maximize the achievable SINR and the spectral efficiency of MU-MIMO systems, proper pilot spacing must be applied to control the impact of the aging channel and to tune the trade-off between pilot and data symbols.

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Section: Introductionmentioning

confidence: 99%

Optimizing Pilot Spacing in MU-MIMO Systems Operating Over Aging Channels

Fodor

Gürgünoğlu

et al. 2023

IEEE Trans. Commun.

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Performance of antenna array receivers in autoregressive flat fading channels

Yan

Rao²

Conference Record of the Thirty-Fourth Asilomar Conference on Signals, Systems and Computers (Cat. No.00CH37154)

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In this paper; we make use of our general results on tracking fast fading channels to study several important special cases to provide insights and explore connections with well known existing results. The fallowing special cases are considered: quasi-static Rayleigh fading channels, fast Rician fading channels and filly correluted fast Rayleigh fading channels. In particular; the role of channel estimation errors. antenna correlation and user signal correlation on detector pe~orrnance are qimit$ed. In addition. we quantifi the effect of the riumber of training symbols on the peflonnance of our MAP receiver with a Kaltnanjlter: Finally. we compare our MAP receiver with two other adaptive receivers. the adaptive channel predictor and the adaptive MMSE combinec The study uses a combinatiori of analysis and simulations.

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