Patent ID: 6907087

Claim:
A multi-sectional coherent detection method, comprising the steps of: A. dividing a length L used for the signal detection into N multicoh segments, performing coherent accumulating with each segment, and obtaining total N multicoh coherent results denoted as X i (i=0 . . . N noncoh −1); B. performing various possible phase adjustments on those N multicoh coherent results (the number of the possible phase adjustments being denoted as P), and denoting the adjustment results as Y i-j (i=0 . . . N multicoh −1, j=0 . . . P−1); C. selecting a value of the adjustment result from P adjustment results corresponding to each coherent result, and the largest number of the combinations being C=P Nmulticoh , D. coherently accumulating N multicoh adjustment results in each combination and obtaining C=P Nmulticoh coherent results denoted as Z t (t=0 . . . C−1); E. among C=P Nmulticoh coherent results, selecting the optimum results as the detection results; wherein, in the phase adjustment of step B, when the number of the phase adjustments is P, performing the phase rotation of φ=φ 0 +k*2 π/p, (k=0 . . . P−1), on the signals respectively, wherein, φ 0 may be any value.