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Electronics and Telecommunications Research Institute (한국전자통신연구원)
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Channel estimation and detection with space-time transmission scheme in colocated multiple-input and multiple-output system

  • Pratibha Rani (Electronics Engineering, J.C. Bose University of Science and Technology, YMCA) ;
  • Arti M.K. (Electronics and Communications Engineering, Netaji Subhash University of Technology (East Campus)) ;
  • Pradeep Kumar Dimri (Electronics Engineering, J.C. Bose University of Science and Technology, YMCA)
  • Received : 2022.06.21
  • Accepted : 2022.11.14
  • Published : 2023.12.10
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Abstract

In this study, a space-time transmission scheme is proposed to tackle the limitations of channel estimation with orthogonal pilot information in colocated multiple-input multiple-output systems with several transmitting and receiving antennas. Channel information is obtained using orthogonal pilots. Channel estimation introduces pilot heads required to estimate a channel. This leads to bandwidth insufficiency. As a result, trade-offs exist between the number of pilots required to estimate a channel versus spectral efficiency. The detection of data symbols is performed using the maximum likelihood decoding method as it provides a consistent approach to parameter estimation problems. The moment-generating function of the instantaneous signal-to-noise ratio is used to drive an approximate expression of the symbol error rate for the proposed scheme. Furthermore, the order of diversity is less by one than the number of receiver antennas used in the proposed scheme. The effect of the length of a pilot sequence on the proposed scheme's performance is also investigated.

Keywords

References

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