发明名称 |
APPARATUS AND METHOD FOR I/Q OFFSET CANCELLATION IN SC-FDMA SYSTEM |
摘要 |
<p>The present invention relates to an apparatus and a method for eliminating I/Q offset in a receiver of a SC-FDMA system which improves performance of the system by accurate measurement and cancellation of I/Q offset in a receiver of a SC-FDMA system operating in a 3GPP LTE uplink. An apparatus for eliminating I/Q offset in a receiver of the SC-FDMA system constituting the receiver of the SC-FDMA system includes: a linear interpolation channel estimation unit for estimating channel using demodulation reference symbol (DMRS) that is a training sequence (X) corresponding to the discrete Fourier transformed signal (Y) that has passed through frame sync acquisition, frequency compensation and cyclic prefix elimination; a signal regeneration/cancellation unit for calculating I/Q offset (D=Y−Y′) by subtracting the discrete Fourier transformed signal (Y) from the ideal discrete Fourier transformed signal (Y′=H′X) generated by using channel coefficient (H′), that is an output of the linear interpolation channel estimation unit, and the DMRS that is the training sequence (X); and an I/Q offset measurement/cancellation unit for generating VQ offset-free signal (YNoDC=Y−D′) by subtracting I/Q offset (D′) having corrected phase and power of the VQ offset (D=Y−Y′) from the discrete Fourier transformed signal (Y).</p> |
申请公布号 |
EP2612457(A1) |
申请公布日期 |
2013.07.10 |
申请号 |
EP20100856774 |
申请日期 |
2010.12.30 |
申请人 |
INNOWIRELESS CO., LTD. |
发明人 |
JOUNG, JINSOUP;HA, KYEONGMIN;JI, SEUNGHWAN;LIM, YONGHOON;JANG, BYUNGKWAN |
分类号 |
H04L27/26;H04L27/38 |
主分类号 |
H04L27/26 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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