A low computing I/Q-mismatch compensator for 3GPP LTE systems

Author

Hsu, Terng-Yin ; Lai, Wei-Chi ; Yeh, Shao-Ying

Author_Institution

Dept. of Comput. Sci., Nat. Chiao-Tung Univ., Hsinchu, Taiwan

fYear

2012

fDate

23-27 July 2012

Firstpage

118

Lastpage

122

Abstract

Variations of I/Q gains and phases of RF frontend, namely I/Q mismatch (I/Q-M), are the important impact in OFDM-based wireless accesses. Making a 2×2 MIMO-OFDM modem of 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) work properly, this work investigates a low computing cross-ratio engine to deal with serious I/Q-M by using only synchronization signal (SS). Through performance evaluation, our approach incurs a 0.3-dB SNR loss to maintain BER<;10^-5 at 1-dB gain error and 15°-phase error. Hence, this work not only ensures adequate performances, but also makes low computing I/Q-M estimation and compensation.

Keywords

3G mobile communication; Long Term Evolution; MIMO communication; OFDM modulation; error statistics; modems; 3GPP LTE systems; 3rd generation partnership project; BER; MIMO-OFDM modem; OFDM-based wireless access; gain error; long term evolution; low computing I-Q-mismatch compensator; low computing cross-ratio engine; performance evaluation; phase error; synchronization signal; Bit error rate; Engines; Estimation; OFDM; Receiving antennas; Signal to noise ratio; Cross-Ratio Engine; I/Q Mismatch (I/Q-M); Long Term Evolution (LTE); Synchronization Signal (SS);

fLanguage

English

Publisher

ieee

Conference_Titel

Cross Strait Quad-Regional Radio Science and Wireless Technology Conference (CSQRWC), 2012

Conference_Location

New Taipei City

Print_ISBN

978-1-4673-1867-9

Type

conf

DOI

10.1109/CSQRWC.2012.6294955

Filename

6294955