| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce the deterioration of correlation equipment performance due to the Doppler shift of digital correlation equipment used in a target detecting system by giving a received signal sample to lump weighting and uniformly weighting correlation equipment channels. SOLUTION: A received signal sample is given to correlation equipment channels 70, 80. The channel 70 is a lump weighting channel so that the sample is weightedly multiplied 72 and the weighted sample is multiplied by the corresponding bit of a delayed correlation reference word 90. The channel 80 is a uniformly weighting channel so that the sample is multiplied 82 by the corresponding bit of the delayed correlation reference word 90. The multiplied product is added over a word segment by a accumulator 84 and sent to shift registers 52, 60. The sequences of the registers 52, 60 are multiplied 54, 62 and added 56, 64, and then standarized by standarizers 58, 68 and subjected to target treatment through a digital filter 92.</p> |
