发明名称 |
PARALLEL CORRELATOR ARCHTITECTURE |
摘要 |
<p>The present invention relates to real time spectral analysis of wide-band sampled signals, in particular to a method and system for real time digital spectral analysis of wide-band sampled signals using parallel processing techniques. The center frequency of each received wide-band signal is shifted by a small fraction epsilon of its bandwidth. After sampling and digitizing, the wide-band signals are de-multiplexed into <i>N</i> parallel sample streams for parallel processing. The sample streams are digitally FIR filtered and sub-band signals are determined by decimating the sample streams by a factor of 2<<i>k</i>>.<i>N;k</i> = 0,1,..., wherein only every 2<<i>k</i>>.<i>N<th>;k</i> = 0,1,... sample is retained and the others are discarded. These sub-band signals may then be processed using various methods of spectral analysis such as cross-correlation, auto-correlation or phased array applications. Any finite-length FIR filter has a finite transition band. After decimation, the transition band outside sub-band boundaries will suffer aliasing, which causes signals to falsely appear as aliased signals within the sub-band. Shifting all spectral features in the wide-band spectrum with a frequency shift epsilon prevents false correlation of the aliased signals.</p> |
申请公布号 |
WO0153982(A1) |
申请公布日期 |
2001.07.26 |
申请号 |
WO2001CA00038 |
申请日期 |
2001.01.17 |
申请人 |
NATIONAL RESEARCH COUNCIL OF CANADA;CARLSON, BRENT, R.;DEWDNEY, PETER, E. |
发明人 |
CARLSON, BRENT, R.;DEWDNEY, PETER, E. |
分类号 |
G06F17/15;(IPC1-7):G06F17/15 |
主分类号 |
G06F17/15 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|