Power Optimization of Tilted Tomlinson-Harashima Precoder in MIMO Channels with Imperfect Channel State Information

Hossein Khaleghi Bizaki, Morteza Khaleghi Hojaghan and Seyyed Mohammad Razavizadeh

Journal of Optimization, 2013, vol. 2013, 1-6

Abstract:

This paper concentrates on the designing of a robust Tomlinson-Harashima Precoder (THP) over multiple-input multiple-output (MIMO) channels in wireless communication systems with assumption of imperfect channel state information (CSI) at the transmitter side. With the assumption that the covariance matrix of channel estimation error is available at the transmitter side, we design a THP that presents robustness against channel uncertainties. In the proposed robust THP, the transmit power is further minimized by using the Tilted constellation concept. This power minimization reduces the interchannel Interference (ICI) between subchannels and, furthermore, recovers some part of the THP's power loss. The bit error rate (BER) of the proposed system is further improved by using a power loading technique. Finally, the simulation results compare the performance of our proposed robust THP with a conventional MIMO-THP.

Date: 2013
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
http://downloads.hindawi.com/journals/7179/2013/636529.pdf (application/pdf)
http://downloads.hindawi.com/journals/7179/2013/636529.xml (text/xml)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:hin:jjopti:636529

DOI: 10.1155/2013/636529

Access Statistics for this article

More articles in Journal of Optimization from Hindawi
Bibliographic data for series maintained by Mohamed Abdelhakeem ().