发明名称 |
VERIFICATION OF PN SYNCHRONIZATION IN A SPREAD-SPECTRUM COMMUNICATIONS RECEIVER |
摘要 |
A system for recognizing degraded pseudo-random noise (PN) synchronization in a spread-spectrum receiver. The system uses a signal that indicates the correlation of the locally generated PN sequence with the received PN sequence. The correlation signal can be a symbol-length integration of the output from a square-law detector, or an appropriate similar signal. If the correlation signal is not degraded by demodulating with a deliberately shifted copy of the PN sequence, there is an indication that the unshifted PN sequence was itself not correctly synchronized. A sufficiently degraded correlation signal indicates that the receiver's PN synchronization is correct. To prevent the loss of transmitted data during the testing, each transmitted frame contains a Measurement field (that contains no payload data) for assessing the synchronization in this manner. The PN sequence is shifted only during this specific portion of the received frame.
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申请公布号 |
WO9823042(A1) |
申请公布日期 |
1998.05.28 |
申请号 |
WO1997US21369 |
申请日期 |
1997.11.21 |
申请人 |
ADVANCED MICRO DEVICES, INC. |
发明人 |
HENDRICKSON, ALAN |
分类号 |
G06F11/00;H03L7/093;H03L7/099;H03L7/107;H03L7/14;H03M13/00;H04B1/707;H04L1/24;H04L7/033;H04L27/00;H04L27/22;H04L27/227;(IPC1-7):H04B1/707 |
主分类号 |
G06F11/00 |
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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