发明名称 |
Orthogonal frequency division multiplexing (OFDM) communications device and method that incorporates low PAPR preamble and frequency hopping |
摘要 |
A communications device includes communication data and a training sequence corresponding to a preamble. A modulation and mapping circuit modulates the communications data and training sequence into a plurality of multiple subcarriers that are orthogonal to each other to form an OFDM communications signal having modulated subcarriers carrying the communications data forming a data payload and modulated subcarriers forming the preamble. A pseudo-random signal generator is operative with the modulation and mapping circuit and generates pseudo-random signals based on an encryption algorithm for frequency hopping each subcarrier at an OFDM symbol rate. The modulation and mapping circuit applies a quadratic modulation to the subcarriers carrying the training sequences to produce a low peak-to-average power ratio (PAPR) preamble with a PAPR value of approximately 2.6 decibels (dB). |
申请公布号 |
US8160165(B2) |
申请公布日期 |
2012.04.17 |
申请号 |
US20080242976 |
申请日期 |
2008.10.01 |
申请人 |
MOFFATT CHRISTOPHER D.;HOFFMANN JOHN E.;HARRIS CORPORATION |
发明人 |
MOFFATT CHRISTOPHER D.;HOFFMANN JOHN E. |
分类号 |
H04K1/10 |
主分类号 |
H04K1/10 |
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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