发明名称 |
Methods and apparatuses using filter banks for multi-carrier spread-spectrum signals |
摘要 |
A transmitter includes a synthesis filter bank to spread a data symbol to a plurality of frequencies by encoding the data symbol on each frequency, apply a common pulse-shaping filter, and apply gains to the frequencies such that a power level of each frequency is less than a noise level of other communication signals within the spectrum. Each frequency is modulated onto a different evenly spaced subcarrier. A demodulator in a receiver converts a radio frequency input to a spread-spectrum signal in a baseband. A matched filter filters the spread-spectrum signal with a common filter having characteristics matched to the synthesis filter bank in the transmitter by filtering each frequency to generate a sequence of narrow pulses. A carrier recovery unit generates control signals responsive to the sequence of narrow pulses suitable for generating a phase-locked loop between the demodulator, the matched filter, and the carrier recovery unit. |
申请公布号 |
US8731027(B2) |
申请公布日期 |
2014.05.20 |
申请号 |
US201113311357 |
申请日期 |
2011.12.05 |
申请人 |
MORADI HUSSEIN;FARHANG BEHROUZ;KUTSCHE CARL A.;BATTELLE ENERGY ALLIANCE, LLC |
发明人 |
MORADI HUSSEIN;FARHANG BEHROUZ;KUTSCHE CARL A. |
分类号 |
H04B1/00 |
主分类号 |
H04B1/00 |
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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