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Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Information Science and Technology / Faculty of Information Science and Technology >
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Impact on Inter-Cell Interference of Reference Signal for Interference Rejection Combining Receiver in LTE-Advanced Downlink
| Title: | Impact on Inter-Cell Interference of Reference Signal for Interference Rejection Combining Receiver in LTE-Advanced Downlink |
| Authors: | Sano, Yousuke Browse this author | | Ohwatari, Yusuke Browse this author | | Miki, Nobuhiko Browse this author | | Sagae, Yuta Browse this author | | Okumura, Yukihiko Browse this author | | Ogawa, Yasutaka Browse this author →KAKEN DB | | Ohgane, Takeo Browse this author →KAKEN DB | | Nishimura, Toshihiko Browse this author →KAKEN DB |
| Keywords: | LTE-Advanced | | interference rejection combining | | inter-cell interference | | reference signal | | turbo equalizer |
| Issue Date: | 1-Dec-2012 |
| Publisher: | Institute of Electronics, Information and Communication Engineers |
| Journal Title: | IEICE Transactions on Communications |
| Volume: | E95B |
| Issue: | 12 |
| Start Page: | 3728 |
| End Page: | 3738 |
| Publisher DOI: | 10.1587/transcom.E95.B.3728 |
| Abstract: | This paper investigates the dominant impact on the interference rejection combining (IRC) receiver due to the downlink reference signal (RS) based covariance matrix estimation scheme. When the transmission modes using the cell-specific RS (CRS) in LTE/LTE-Advanced are assumed, the property of the non-precoded CRS is different from that of the data signals. This difference poses two problems to the IRC receiver. First, it results in different levels of accuracy for the RS based covariance matrix estimation. Second, assuming the case where the CRS from the interfering cell collides with the desired data signals of the serving cell, the IRC receiver cannot perfectly suppress this CRS interference. The results of simulations assuming two transmitter and receiver antenna branches show that the impact of the CRS-to-CRS collision among cells is greater than that for the CRS interference on the desired data signals especially in closed-loop multiple-input multiple-output (MIMO) systems, from the viewpoint of the output signal-to-interference-plus-noise power ratio (SINR). However, the IRC receiver improves the user throughput by more than 20% compared to the conventional maximal ratio combining (MRC) receiver under the simulation assumptions made in this paper even when the CRS-to-CRS collision is assumed. Furthermore, the results verify the observations made in regard to the impact of inter-cell interference of the CRS for various average received signal-to-noise power ratio (SNR) and signal-to-interference power ratio (SIR) environments. |
| Rights: | Copyright © 2012 The Institute of Electronics, Information and Communication Engineers |
| Relation: | http://search.ieice.org/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/52000 |
| Appears in Collections: | 情報科学院・情報科学研究院 (Graduate School of Information Science and Technology / Faculty of Information Science and Technology) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 西村 寿彦
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