A novel front-end noise power and snr estimation using wavelet-packets in OFDM systems
In this paper, a noise power estimator based on one OFDM preamble is proposed. The estimator, unlike others, performs noise power estimation at the front-end of the receiver. The proposed estimator takes into consideration the different noise power levels over the OFDM sub-carriers. The OFDM band is...
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| Main Authors: | , , , |
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| 格式: | Conference or Workshop Item |
| 出版: |
2008
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| 主題: | |
| 在線閱讀: | http://eprints.utp.edu.my/447/1/paper.pdf http://www.scopus.com/inward/record.url?eid=2-s2.0-58049160187&partnerID=40&md5=2244d85eb80d13b078c607d11e30f25c http://eprints.utp.edu.my/447/ |
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| 機構: | Universiti Teknologi Petronas |
| 總結: | In this paper, a noise power estimator based on one OFDM preamble is proposed. The estimator, unlike others, performs noise power estimation at the front-end of the receiver. The proposed estimator takes into consideration the different noise power levels over the OFDM sub-carriers. The OFDM band is divided into several sub-bands using wavelet packet and noise in each sub-band is considered white. The second-order statistics of the transmitted OFDM preamble are calculated in each sub-band and the noise power is estimated. The proposed estimator is compared with Reddy's estimator for colored noise in terms of mean squared error (MSE).
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