Presentation 2012-10-18
Performance Evaluation of Interference Rejection Combining Receiver in LTE-Advanced Uplink CoMP
Takashi IWAI, Kazuki TAKEDA, Akihiko NISHIO, Atsushi MATSUMOTO, Sadaki FUTAGI,
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Abstract(in English) Introduction of coordinated multipoint (CoMP) operation is considered to enhance the spectrum efficiency in LTE-Advanced (Release 11) uplink. The multiple user equipments (UEs) within the coordinated cells should be multiplexed on the same frequency to increase spectrum efficiency. The interference rejection combining (IRC) receiver is effective in separating the signals of multiplexed UEs on the same frequency. The IRC receiver requires highly accurate channel estimation of the desired and interfered signals. Hence, the cell to apply the CoMP operation needs to calculate the channel estimation of each UE with high accuracy using the de-modulation reference signal (DMRS) of multiplexing UEs. However, assuming realistic cell specific scheduler, the performance improvement by applying CoMP decreases because the channel estimation accuracy is deteriorated greatly due to collapse the orthogonality relation of DMRS sequences among multiplexing UEs. In this paper, we propose the IRC receiver that changes the covariance matrix estimation method based on whether DMRS sequences can be separated or not. This paper verifies the uplink CoMP performance using the proposed IRC receiver by using system level simulation. The simulation results show that the proposed IRC receiver improves the system performance and cell-edge throughput more than 10% over the conventional IRC receiver.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) LTE-Advanced / uplink / CoMP / IRC receiver / inter-cell interference / DMRS / system level simulation
Paper # RCS2012-138,SR2012-58,AN2012-32,USN2012-35
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Conference Date 2012/10/10(1days)
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Registration To Ubiquitous and Sensor Networks(USN)
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Performance Evaluation of Interference Rejection Combining Receiver in LTE-Advanced Uplink CoMP
Sub Title (in English)
Keyword(1) LTE-Advanced
Keyword(2) uplink
Keyword(3) CoMP
Keyword(4) IRC receiver
Keyword(5) inter-cell interference
Keyword(6) DMRS
Keyword(7) system level simulation
1st Author's Name Takashi IWAI
1st Author's Affiliation Panasonic Mobile Communications R&D Lab. Co., Ltd()
2nd Author's Name Kazuki TAKEDA
2nd Author's Affiliation Tokyo R&D Center, Panasonic Corporation
3rd Author's Name Akihiko NISHIO
3rd Author's Affiliation Tokyo R&D Center, Panasonic Corporation
4th Author's Name Atsushi MATSUMOTO
4th Author's Affiliation Panasonic Mobile Communications R&D Lab. Co., Ltd
5th Author's Name Sadaki FUTAGI
5th Author's Affiliation Panasonic Mobile Communications R&D Lab. Co., Ltd
Date 2012-10-18
Paper # RCS2012-138,SR2012-58,AN2012-32,USN2012-35
Volume (vol) vol.112
Number (no) 242
Page pp.pp.-
#Pages 6
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