### Abstract

This paper presents a new algorithm for the channel estimation of the OFDM system based on a pilot signal for the new generation of high data rate communication systems. In orthogonal frequency division multiplexing (OFDM) systems over fast-varying fading channels, channel estimation and tracking is generally carried out by transmitting known pilot symbols in given positions of the frequency-time grid. In this paper, we propose to derive an improved algorithm based on the calculation of the mean and the variance of the adjacent pilot signals for a specific distribution of the pilot signals in the OFDM frequency-time grid then calculating of the entire unknown channel coefficients from the equation of the mean and the variance. Simulation results shows that the performance of the OFDM system increase as the length of the channel increase where the accuracy of the estimated channel will be increased using this low complexity algorithm, also the number of the pilot signal needed to be inserted in the OFDM signal will be reduced which lead to increase in the throughput of the signal over the OFDM system in compared with other type of the distribution such as Comb type and Block type channel estimation.

Original language | English |
---|---|

Pages (from-to) | 66-68 |

Number of pages | 3 |

Journal | World Academy of Science, Engineering and Technology |

Volume | 38 |

Publication status | Published - Feb 2009 |

### Fingerprint

### Keywords

- Block type channel estimation
- Channel estimation
- Comb type channel estimation
- Orthogonal frequency division multiplexing (OFDM)

### ASJC Scopus subject areas

- Engineering(all)

### Cite this

*World Academy of Science, Engineering and Technology*,

*38*, 66-68.

**An improved algorithm for channel estimations of OFDM system based pilot signal.** / Alnuaimy, Ahmed N H; Ismail, Mahamod; Ali, Mohd A M; Jumari, Kasmiran; El-Saleh, Ayman A.

Research output: Contribution to journal › Article

*World Academy of Science, Engineering and Technology*, vol. 38, pp. 66-68.

}

TY - JOUR

T1 - An improved algorithm for channel estimations of OFDM system based pilot signal

AU - Alnuaimy, Ahmed N H

AU - Ismail, Mahamod

AU - Ali, Mohd A M

AU - Jumari, Kasmiran

AU - El-Saleh, Ayman A.

PY - 2009/2

Y1 - 2009/2

N2 - This paper presents a new algorithm for the channel estimation of the OFDM system based on a pilot signal for the new generation of high data rate communication systems. In orthogonal frequency division multiplexing (OFDM) systems over fast-varying fading channels, channel estimation and tracking is generally carried out by transmitting known pilot symbols in given positions of the frequency-time grid. In this paper, we propose to derive an improved algorithm based on the calculation of the mean and the variance of the adjacent pilot signals for a specific distribution of the pilot signals in the OFDM frequency-time grid then calculating of the entire unknown channel coefficients from the equation of the mean and the variance. Simulation results shows that the performance of the OFDM system increase as the length of the channel increase where the accuracy of the estimated channel will be increased using this low complexity algorithm, also the number of the pilot signal needed to be inserted in the OFDM signal will be reduced which lead to increase in the throughput of the signal over the OFDM system in compared with other type of the distribution such as Comb type and Block type channel estimation.

AB - This paper presents a new algorithm for the channel estimation of the OFDM system based on a pilot signal for the new generation of high data rate communication systems. In orthogonal frequency division multiplexing (OFDM) systems over fast-varying fading channels, channel estimation and tracking is generally carried out by transmitting known pilot symbols in given positions of the frequency-time grid. In this paper, we propose to derive an improved algorithm based on the calculation of the mean and the variance of the adjacent pilot signals for a specific distribution of the pilot signals in the OFDM frequency-time grid then calculating of the entire unknown channel coefficients from the equation of the mean and the variance. Simulation results shows that the performance of the OFDM system increase as the length of the channel increase where the accuracy of the estimated channel will be increased using this low complexity algorithm, also the number of the pilot signal needed to be inserted in the OFDM signal will be reduced which lead to increase in the throughput of the signal over the OFDM system in compared with other type of the distribution such as Comb type and Block type channel estimation.

KW - Block type channel estimation

KW - Channel estimation

KW - Comb type channel estimation

KW - Orthogonal frequency division multiplexing (OFDM)

UR - http://www.scopus.com/inward/record.url?scp=69149087863&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=69149087863&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:69149087863

VL - 38

SP - 66

EP - 68

JO - World Academy of Science, Engineering and Technology

JF - World Academy of Science, Engineering and Technology

SN - 2010-376X

ER -