发明名称 |
CLEAR-CHANNEL SYSTEM AND RELATED APPLICATIONS |
摘要 |
<p>A wireless spread-spectrum communication system for transmitting data includes a plurality of end point transmitters and at least one receiver. The end point transmitters transmit data via a frequency-hopped spread-spectrum signal where the transmitting signal is sent without the benefit of frequency stabilization. The receiver is responsive to the frequency-hopping spread-spectrum signals and includes a correlator and a signal processor. The correlator samples at least a first portion of a preamble of the signal and correlates the portion of the preamble with a known preamble pattern to determine a probability of correlation. The signal processor applies a Fast Fourier Transform algorithm to the signal in response to the probability of correlation to track a narrowband frequency of the signal based on at least a second portion of the preamble and to decode data encoded within the signal subsequent to the preamble.</p> |
申请公布号 |
WO2007139678(A3) |
申请公布日期 |
2008.03.13 |
申请号 |
WO2007US11319 |
申请日期 |
2007.05.10 |
申请人 |
ITRON, INC.;CORNWALL, MARK, K. |
发明人 |
CORNWALL, MARK, K. |
分类号 |
H04B1/00;G08C15/06;G08C19/16 |
主分类号 |
H04B1/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|