Channel estimation in narrowband wireless communication systems

Arslan, Hüseyin; Bottomley, G.E.

doi:10.1002/wcm.14

Cited by 62 publications

(41 citation statements)

References 139 publications

(239 reference statements)

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“…In spacetime coding, different signals are simultaneously transmitted from different transmit antennas. The signal which is received is the superposition of the different transmitted signals, and the detection process needs estimates of the channel parameters [3]. Performance analysis methods often consider perfect channel estimates under the assumption that the estimation errors are negligible.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of space-time coding with imperfect channel estimation

Garg

Mallik

Gupta

2005

IEEE Trans. Wireless Commun.

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Abstract-We analyze the error performance of a space-time coding system using transmit and receive antennas with imperfect channel estimation in flat Rayleigh fading. A least-squares estimate of the channel matrix is obtained by using a sequence of pilot code vectors. The estimate is found to be perturbed by an perturbation matrix with zero-mean circular Gaussian entries. Using the characteristic function of the decision variable, we derive a closed-form expression for the pairwise error probability (PEP). From the same expression, the PEP in case of perfect channel estimation is also obtained. Numerical results show the degradation in performance due to imperfect channel estimation that can be compensated by increasing the number of receive antennas.

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Section: Introductionmentioning

confidence: 99%

Performance analysis of space-time coding with imperfect channel estimation

Garg

Mallik

Gupta

2005

IEEE Trans. Wireless Commun.

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“…The optimality criterion of this method is to minimize the least square errors to find an optimal estimator to the unknown parameters [9]. It is widely used in practice due to its salient feature that no probabilistic assumptions are made about the parameters.…”

Section: Least-squares (Ls) Estimationmentioning

confidence: 99%

“…In the first comparison, one way of quantifying channel estimation performance is by MSE matrix [9], also referred to as the error covariance. The MSE matrix can be defined as…”

Section: Fd-ls O(m) O(1)mentioning

confidence: 99%

“…For TS-based channel estimation in high speed wireless communications, there mainly are two different ways to estimate the channel impulses, i.e., time-domain (TD) method and frequency-domain (FD) method [7,8]. As a typical channel estimation method, TD channel estimation has been discussed extensively for conventional radio communications [9,10]. However, http://jwcn.eurasipjournals.com/content/2012/1/326 LED LED only a few works have been done for the channel estimation for diffused WOC systems [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…Motivated by the research [7][8][9][10][11][12][13][14][15], this article focuses on the TS-based channel estimation methods in FD for WOC systems. Considering the propagation property of light and the characteristics of optical modulation, this article establishes the mathematical channel model for indoor WOC systems.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Training sequence based frequency-domain channel estimation for indoor diffuse wireless optical communications

Wang

Xie

Yuan

et al. 2012

J Wireless Com Network

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Channel estimation is a key technology for wireless optical communication (WOC) systems. Based on the training sequence (TS), this article develops three frequency domain (FD) channel estimation approaches for diffuse wireless optical channels. Considering the propagation property of light and the characteristics of optical modulation, this article establishes a link model for the indoor WOC systems. Using the established link model, three FD channel estimation methods, such as the LS method, the minimum mean square error (MMSE) method and the ORL-MMSE method are proposed. The computational complexity analysis gives time complexities of the three channel estimation methods in FD. This article also evaluates the performance of the proposed three methods by computer simulation, measuring in terms of MSE and BER, respectively. Further more, based on the Cramer-Rao Bound theorem, optimal TSs are found and tabulated for different channel responses and TS lengths. By using the optimal TSs, channel estimation errors measured by BER performance are also investigated.

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Channel Tracking in Wireless Communication Systems

Bottomley

Arslan

2003

Wiley Encyclopedia of Telecommunications

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Channel estimation is an integral part of standard adaptive receiver designs used in digital wireless communication systems. In this article, commonly used approaches to channel tracking are reviewed, including both filtering and recursive approaches. These approaches are based on approximate models of how the channel response changes with time. Both reference‐assisted (pilot symbols, pilot channel) and data‐directed channel tracking are considered. Applications include second and third generation digital cellular communication systems, which employ time‐division multiple‐access (TDMA) or direct‐sequence code‐division multiple‐access (DS‐CDMA).

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Channel estimation in narrowband wireless communication systems

Cited by 62 publications

References 139 publications

Performance analysis of space-time coding with imperfect channel estimation

Performance analysis of space-time coding with imperfect channel estimation

Training sequence based frequency-domain channel estimation for indoor diffuse wireless optical communications

Channel Tracking in Wireless Communication Systems

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