发明名称 |
COMMUNICATION SYSTEM WITH CONCATENATED MATCHED FILTER AND DOPPLER-TOLERANT POLYPHASE CODES |
摘要 |
A communication apparatus and method (400) that includes generating a series of successive spread-spectrum signals formed through the concatenation of a direct sequence spread spectrum code with a Doppler Tolerant Polyphase Code (DTPC) (410) is herein disclosed. By transmitting concatenated codes, it is possible to demodulate received sequences that are very long compared to the inverse of the Doppler frequency and/or the local oscillator drift. The method and apparatus may be applied to implement a wireless telecommunication system that efficiently transfers small quantities of data, such as status/telemetry identification information and/or establishes device location at a low data rate over long distance in challenging radio environments and with low power consumption. |
申请公布号 |
WO2004070870(A3) |
申请公布日期 |
2006.09.28 |
申请号 |
WO2004US03082 |
申请日期 |
2004.02.03 |
申请人 |
HYPERTAG COMMUNICATIONS, INC.;ROMAN, VINCENTZIO, ISACHAR |
发明人 |
ROMAN, VINCENTZIO, ISACHAR |
分类号 |
H04B1/69;H04B1/707;H04J13/00;H04J13/10 |
主分类号 |
H04B1/69 |
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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