### Abstract

Recently, the superimposed pilot channel estimation has attracted attention for wireless communications, where the pilot symbol sequence is superimposed on a data symbol sequence and transmitted together, and thus there is no drop in information rate. In the superimposed pilot channel estimation, the receiver correlates the received symbol sequence with the pilot symbol sequence, and obtains the channel estimate. However, the correlation between the pilot symbol sequence and the data symbol sequence deteriorates the channel estimation accuracy. In particular, the channel estimation accuracy of the superimposed pilot channel estimation scheme is significantly deteriorated in MIMO systems, because the pilot symbol power of each transmit antenna to the total transmit power of all transmit antennas becomes smaller as the number of transmit antennas increases. On the other hand, it has been well known that the SAGE algorithm is an effective method for channel estimation and data detection. This algorithm is particularly effective in MIMO systems, because the operation of this algorithm can cancel the interference from other transmit antennas. In this paper, we evaluate the performance of the SAGE algorithm for channel estimation and data detection using superimposed pilot channel estimation in MIMO systems. From the results of computer simulations, we show that the system using the SAGE algorithm with superimposed training can achieve the good BER performances by using the SAGE algorithm with iteration.

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

Pages (from-to) | 1460-1466 |

Number of pages | 7 |

Journal | IEICE Transactions on Communications |

Volume | E90-B |

Issue number | 6 |

DOIs | |

Publication status | Published - 2007 Jun |

### Fingerprint

### Keywords

- MIMO
- SAGE algorithm
- Superimposed pilot

### ASJC Scopus subject areas

- Electrical and Electronic Engineering
- Computer Networks and Communications
- Software

### Cite this

**Performance evaluation of SAGE algorithm for channel estimation and data detection using superimposed training in MIMO system.** / Tsuzuki, Fumiaki; Ohtsuki, Tomoaki.

Research output: Contribution to journal › Article

*IEICE Transactions on Communications*, vol. E90-B, no. 6, pp. 1460-1466. https://doi.org/10.1093/ietcom/e90-b.6.1460

}

TY - JOUR

T1 - Performance evaluation of SAGE algorithm for channel estimation and data detection using superimposed training in MIMO system

AU - Tsuzuki, Fumiaki

AU - Ohtsuki, Tomoaki

PY - 2007/6

Y1 - 2007/6

N2 - Recently, the superimposed pilot channel estimation has attracted attention for wireless communications, where the pilot symbol sequence is superimposed on a data symbol sequence and transmitted together, and thus there is no drop in information rate. In the superimposed pilot channel estimation, the receiver correlates the received symbol sequence with the pilot symbol sequence, and obtains the channel estimate. However, the correlation between the pilot symbol sequence and the data symbol sequence deteriorates the channel estimation accuracy. In particular, the channel estimation accuracy of the superimposed pilot channel estimation scheme is significantly deteriorated in MIMO systems, because the pilot symbol power of each transmit antenna to the total transmit power of all transmit antennas becomes smaller as the number of transmit antennas increases. On the other hand, it has been well known that the SAGE algorithm is an effective method for channel estimation and data detection. This algorithm is particularly effective in MIMO systems, because the operation of this algorithm can cancel the interference from other transmit antennas. In this paper, we evaluate the performance of the SAGE algorithm for channel estimation and data detection using superimposed pilot channel estimation in MIMO systems. From the results of computer simulations, we show that the system using the SAGE algorithm with superimposed training can achieve the good BER performances by using the SAGE algorithm with iteration.

AB - Recently, the superimposed pilot channel estimation has attracted attention for wireless communications, where the pilot symbol sequence is superimposed on a data symbol sequence and transmitted together, and thus there is no drop in information rate. In the superimposed pilot channel estimation, the receiver correlates the received symbol sequence with the pilot symbol sequence, and obtains the channel estimate. However, the correlation between the pilot symbol sequence and the data symbol sequence deteriorates the channel estimation accuracy. In particular, the channel estimation accuracy of the superimposed pilot channel estimation scheme is significantly deteriorated in MIMO systems, because the pilot symbol power of each transmit antenna to the total transmit power of all transmit antennas becomes smaller as the number of transmit antennas increases. On the other hand, it has been well known that the SAGE algorithm is an effective method for channel estimation and data detection. This algorithm is particularly effective in MIMO systems, because the operation of this algorithm can cancel the interference from other transmit antennas. In this paper, we evaluate the performance of the SAGE algorithm for channel estimation and data detection using superimposed pilot channel estimation in MIMO systems. From the results of computer simulations, we show that the system using the SAGE algorithm with superimposed training can achieve the good BER performances by using the SAGE algorithm with iteration.

KW - MIMO

KW - SAGE algorithm

KW - Superimposed pilot

UR - http://www.scopus.com/inward/record.url?scp=67650793386&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=67650793386&partnerID=8YFLogxK

U2 - 10.1093/ietcom/e90-b.6.1460

DO - 10.1093/ietcom/e90-b.6.1460

M3 - Article

VL - E90-B

SP - 1460

EP - 1466

JO - IEICE Transactions on Communications

JF - IEICE Transactions on Communications

SN - 0916-8516

IS - 6

ER -