To verify the performance of ds sequence , a kind of correlation detector is designed , and its ber formula is derived 針對cne切snev直接擴頻序列,提出并設(shè)計了一種相關(guān)檢測方案,推導(dǎo)了該方案的誤碼率公式。
Because the detector based on the fourth - order cumulant 2 - d slice , which has better ability to suppress gaussian noise , possesses both characters of square detector and correlation detector , it can estimate not only the carrier frequency , but also the symbol period 其中,基于四階累積量2 - d切片的檢測方法能夠很好地抑制高斯噪聲,并且兼顧了時域相關(guān)檢測和平方倍頻檢測兩種方法的特點,能夠同時估計出載波頻率和擴頻碼周期兩個參數(shù)。
By posing the difference on mathematical models between blind detection and non - blind detection , we devise the sign correlation detector ( scd ) and the normalized liner correlation detector ( nlcd ) based on the laplacian distribution model and the local gaussian distribution model of the host signal respectively . a series of experiments in dct domain and dwt domain show that these two detectors are more robust than linear correlation detector ( lcd ) 基于局部最優(yōu)檢測理論得到了廣義高斯分布模型下盲檢測器的一般形式?幅度一符號相關(guān)檢測器,通過計算幅度一符號相關(guān)檢測器相對于線性相關(guān)檢測器的漸進相對效率,建立了漸進相對效率與宿主信號形狀參數(shù)之間的關(guān)系,從理論上證實了幅度一符號相關(guān)檢測器的高效性。