发明名称 Modem and method for transmitting data in a medium notably such as air and water
摘要 A method for transmitting data is disclosed having the following steps: emitting packets of at least two types: pure data (long packets) and acknowledgments of receipt (acknowledgment) (short packets). Each packet is formed of three components: a—an acquisition preamble, (1) for presence detection and the joint determination of the initial values of the time shift and of the frequency shift, and b—the data proper, (2) and c—a set of unmodulated fixed carriers (3) making it possible to permanently estimate the frequency shift.
申请公布号 US7835228(B2) 申请公布日期 2010.11.16
申请号 US20060094982 申请日期 2006.11.24
申请人 THALES 发明人 LAURENT PIERRE-ANDRE
分类号 H04B11/00;H04L27/26 主分类号 H04B11/00
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