The Pilot Design for Channel Estimation in a Practical MIMO OFDM System

Son, Jae Sung; Kim, Jihyung; Kwon, Dongseung

doi:10.1109/icc.2009.26

Cited by 1 publication

(2 citation statements)

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“…In [10], it is explained that the locations of the pilot subcarriers can't be equally spaced, because the practical system utilizes the virtual subcarriers. Therefore, it seems so hard to obtain the minimum mean square error (MMSE) of the maximum likelihood (ML) estimation.…”

Section: Introductionmentioning

confidence: 99%

“…It could be not a very sententious idea that, the true and complete reconstruction of transmitted information is looked impossible without a suitable channel estimation technique. Hitherto, several techniques are presented as a proper channel estimation technique in MIMO-OFDM systems, which are grouped as blind and semi blind [3][4][5] or training based [6][7][8][9][10][11][12] schemes. The aim of this paper is pilot based channel estimation strategies.…”

Section: Introductionmentioning

confidence: 99%

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The management of pilot symbols in MIMO- OFDM systems by adding a feedback branch

Bakhshi

Sabooniha

2011

2011 IEEE Symposium on Wireless Technology and Applications (ISWTA)

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Channel estimation techniques for Multi Input Multi O u t p u t O r t h o g o n a l F r e q u e n c y Division Multiplex (MIMO-OFDM) systems based on a pilot arrangement are investigated. Training based C h a n n e l e s t i m a t i o n w i t h a block type pilot arrangement is studied through an algorithm for determination of efficient number of pilot symbols in an OFDM symbol by adding a feedback branch and employment of the Maximal Ratio Receiver Combining (MRRC) technique as a MIMO scheme. Channel estimation at pi l ot f r e que nc ie s is based on the Least Square (LS) method while channel interpolation is performed by a linear interpolation.Finally, the influence of the new algorithm through three different Stanford University Interim (SUI) channel models are simulated and studied. It will be shown dramatic amount of assigned bandwidth for channel estimation can be saved for data transmission by proposed technique. Moreover, a comparison between this system and a simple OFDM system without any MIMO technique is presented. Also, the Bit Error Rate (BER) performances of both systems are indicated and compared with each other at the end.

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Section: Introductionmentioning

confidence: 99%