Blind carrier frequency offset estimation for constant modulus signaling based OFDM systems： algorithm, identifiability, and performance analysis
Cartier frequency offset （CFO） estimation is critical for orthogonal frequency-division multiplexing （OFDM） based transmissions. In this paper, we present a low-complexity, blind CFO estimator for OFDM systems with constant modulus （CM） signaling. Both single-input single-output （SISO） and multiple-...
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| Veröffentlicht in: | Frontiers of information technology & electronic engineering 2010, Vol.11 (1), p.14-26 |
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| creator | Xu, Wei-yang Lu, Bo Hu, Xing-bo Hong, Zhi-liang |
| description | Cartier frequency offset （CFO） estimation is critical for orthogonal frequency-division multiplexing （OFDM） based transmissions. In this paper, we present a low-complexity, blind CFO estimator for OFDM systems with constant modulus （CM） signaling. Both single-input single-output （SISO） and multiple-input multiple-output （MIMO） systems are considered. Based on the assumption that the channel keeps constant during estimation, we prove that the CFO can be estimated uniquely and exactly through minimizing the power difference of received data on the same subcarriers between two consecutive OFDM symbols; thus, the identifiability problem is assured. Inspired by the sinusoid-like cost function, curve fitting is utilized to simplify our algorithm. Performance analysis reveals that the proposed estimator is asymptotically unbiased and the mean square error （MSE） exhibits no error floor. We show that this blind scheme can also be applied to a MIMO system. Numerical simulations show that the proposed estimator provides excellent performance compared with existing blind methods. |
| doi_str_mv | 10.1631/jzus.C0910150 |
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In this paper, we present a low-complexity, blind CFO estimator for OFDM systems with constant modulus （CM） signaling. Both single-input single-output （SISO） and multiple-input multiple-output （MIMO） systems are considered. Based on the assumption that the channel keeps constant during estimation, we prove that the CFO can be estimated uniquely and exactly through minimizing the power difference of received data on the same subcarriers between two consecutive OFDM symbols; thus, the identifiability problem is assured. Inspired by the sinusoid-like cost function, curve fitting is utilized to simplify our algorithm. Performance analysis reveals that the proposed estimator is asymptotically unbiased and the mean square error （MSE） exhibits no error floor. We show that this blind scheme can also be applied to a MIMO system. 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Zhejiang Univ. - Sci. C</addtitle><addtitle>Journal of zhejiang university science</addtitle><description>Cartier frequency offset （CFO） estimation is critical for orthogonal frequency-division multiplexing （OFDM） based transmissions. In this paper, we present a low-complexity, blind CFO estimator for OFDM systems with constant modulus （CM） signaling. Both single-input single-output （SISO） and multiple-input multiple-output （MIMO） systems are considered. Based on the assumption that the channel keeps constant during estimation, we prove that the CFO can be estimated uniquely and exactly through minimizing the power difference of received data on the same subcarriers between two consecutive OFDM symbols; thus, the identifiability problem is assured. Inspired by the sinusoid-like cost function, curve fitting is utilized to simplify our algorithm. Performance analysis reveals that the proposed estimator is asymptotically unbiased and the mean square error （MSE） exhibits no error floor. We show that this blind scheme can also be applied to a MIMO system. Numerical simulations show that the proposed estimator provides excellent performance compared with existing blind methods.</description><subject>Algorithms</subject><subject>Carrier frequencies</subject><subject>Communications Engineering</subject><subject>Computer Hardware</subject><subject>Computer Science</subject><subject>Computer Systems Organization and Communication Networks</subject><subject>Cost analysis</subject><subject>Cost function</subject><subject>Curve fitting</subject><subject>Electrical Engineering</subject><subject>Electronics and Microelectronics</subject><subject>Instrumentation</subject><subject>MIMO communication</subject><subject>MIMO系统</subject><subject>Networks</subject><subject>OFDM系统</subject><subject>Orthogonal Frequency Division Multiplexing</subject><subject>SISO (control systems)</subject><subject>信号</subject><subject>性能分析</subject><subject>模估计</subject><subject>简化算法</subject><subject>识别</subject><subject>载波频偏</subject><issn>1869-1951</issn><issn>2095-9184</issn><issn>1869-196X</issn><issn>2095-9230</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNp1kMFu1DAQhiNEJaq2R-4WXJvFjhMnPsLSQqWiXorEzZo4duolsbce5xBegxvPwjvxCni1BU7MxTPyN_9v_0XxktENE5y92X1bcLOlklHW0GfFKeuELJkUX57_7Rv2orhA3NFcvGmk4KfF93eT8wPREKMzkdhoHhfj9UqCtWgSMZjcDMkFT2yIRAePCXwicxiWaUGCbvSQJUbSA5qB3F2__0RwxWRm_PXzB4FpDNGlh_mSuMH45KyD3k0urZcEsvHexKw7g9cmzzCt6PC8OLEwobl4Os-Kz9dX99uP5e3dh5vt29tSc85SWbcUhobbnjELHKq2rWk7gBWCMik7K6tO0KGXgxBM9KZqqWw41R3Uhwvd8LPi9VF3H0P-NSa1C0vMj0BVSda1FWeyzVR5pHQMiNFYtY85krgqRtUhenWIXv2JPvObI4-Z86OJ_1T_t_DqyeAh-PEx76ge9FfrJqN41TV13VH-G6mQlfc</recordid><startdate>2010</startdate><enddate>2010</enddate><creator>Xu, Wei-yang</creator><creator>Lu, Bo</creator><creator>Hu, Xing-bo</creator><creator>Hong, Zhi-liang</creator><general>SP Zhejiang University Press</general><general>Springer Nature B.V</general><scope>2RA</scope><scope>92L</scope><scope>CQIGP</scope><scope>W92</scope><scope>~WA</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>AFKRA</scope><scope>ARAPS</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>GNUQQ</scope><scope>HCIFZ</scope><scope>JQ2</scope><scope>K7-</scope><scope>L6V</scope><scope>M7S</scope><scope>P5Z</scope><scope>P62</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PTHSS</scope></search><sort><creationdate>2010</creationdate><title>Blind carrier frequency offset estimation for constant modulus signaling based OFDM systems： algorithm, identifiability, and performance analysis</title><author>Xu, Wei-yang ; 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Zhejiang Univ. - Sci. C</stitle><addtitle>Journal of zhejiang university science</addtitle><date>2010</date><risdate>2010</risdate><volume>11</volume><issue>1</issue><spage>14</spage><epage>26</epage><pages>14-26</pages><issn>1869-1951</issn><issn>2095-9184</issn><eissn>1869-196X</eissn><eissn>2095-9230</eissn><abstract>Cartier frequency offset （CFO） estimation is critical for orthogonal frequency-division multiplexing （OFDM） based transmissions. In this paper, we present a low-complexity, blind CFO estimator for OFDM systems with constant modulus （CM） signaling. Both single-input single-output （SISO） and multiple-input multiple-output （MIMO） systems are considered. Based on the assumption that the channel keeps constant during estimation, we prove that the CFO can be estimated uniquely and exactly through minimizing the power difference of received data on the same subcarriers between two consecutive OFDM symbols; thus, the identifiability problem is assured. Inspired by the sinusoid-like cost function, curve fitting is utilized to simplify our algorithm. Performance analysis reveals that the proposed estimator is asymptotically unbiased and the mean square error （MSE） exhibits no error floor. We show that this blind scheme can also be applied to a MIMO system. Numerical simulations show that the proposed estimator provides excellent performance compared with existing blind methods.</abstract><cop>Heidelberg</cop><pub>SP Zhejiang University Press</pub><doi>10.1631/jzus.C0910150</doi><tpages>13</tpages></addata></record> |
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| subjects | Algorithms Carrier frequencies Communications Engineering Computer Hardware Computer Science Computer Systems Organization and Communication Networks Cost analysis Cost function Curve fitting Electrical Engineering Electronics and Microelectronics Instrumentation MIMO communication MIMO系统 Networks OFDM系统 Orthogonal Frequency Division Multiplexing SISO (control systems) 信号 性能分析 模估计 简化算法 识别 载波频偏 |
| title | Blind carrier frequency offset estimation for constant modulus signaling based OFDM systems： algorithm, identifiability, and performance analysis |
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