发明名称 |
Method of synchronizing an independent data device of a wireless data communications system on an incident pulsed signal of the ultra wide band type, and corresponding independent data device |
摘要 |
An incident signal contains a preamble including a training sequence having a series of pulses whose polarity and time shifts are defined by respective polarity code and time-hopping code. A method includes a digital cross-correlation of the received signal with the training sequence. The cross-correlation algebraically sums in accordance with the polarity code windows of the received signal. The starting points of the windows are determined by the time-hopping code. The cross-correlation further includes detecting the end point of the preamble from the result of the digital cross-correlation. When the size of the receiving buffer, i.e., the size of the window is smaller than the number N of samples of each replica of the training sequence, it is particularly advantageous that the digital cross-correlation be performed iteratively in a block-by-block fashion. The computation of each block is split into M slices which are computed by algebraically summing windows N/M samples long.
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申请公布号 |
US2004240597(A1) |
申请公布日期 |
2004.12.02 |
申请号 |
US20040814824 |
申请日期 |
2004.03.31 |
申请人 |
STMICROELECTRONICS N.V. |
发明人 |
CATTANEO CHIARA;RINALDI NILS;FRIGERIO MATTEO;CATTENOZ REGIS |
分类号 |
H04B1/69;(IPC1-7):H04L27/06 |
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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