发明名称 |
SYSTEM FOR DIRECT ACQUISITION OF RECEIVED SIGNALS |
摘要 |
<p>Signal processing architectures for direct acquisition of spread spectrum signals using long codes. Techniques are described for achieving a high of parallelism, employing code matched filter banks and other hardware sharing. In one embodiment, upper and lower sidebands are treated as two independent signals with identical spreading codes. Cross-correlators, in preferred embodiments, are comprised of a one or more banks of CMFs for computing parallel short-time correlations (STCs) of received signal samples and repli ca code sequence samples, and a means for calculating the cross-correlation values utilizing discrete-time Fourier analysis of the computed STCs. One or more intermediate quantizers may optionally be disposed between the bank of code matched filters and the cross-correlation calculation means for reducin g word-sizes of the STCs prior to Fourier analysis. The techniques described m ay be used with BOC modulated signals or with any signals having at least two distinct sidebands.</p> |
申请公布号 |
CA2501878(A1) |
申请公布日期 |
2004.04.22 |
申请号 |
CA20032501878 |
申请日期 |
2003.10.09 |
申请人 |
THE MITRE CORPORATION |
发明人 |
BETZ, JOHN;FITE, JOHN;CAPOZZA, PAUL |
分类号 |
H04B1/707;(IPC1-7):H04B1/707 |
主分类号 |
H04B1/707 |
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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