5.1 Geometric rep.of the sig waveforms 1.Review of the Vectors and Vector Space Let B=fe,...,ey}be an orthonormal basis for a N dimensional vector space RV. If v is any vector in the space,then it can be written uniquely in the form V=a1e1+a2e2+…+awev a,...,ay are called the coordinates of v. e2=j a +■，+，+ 02 u=(m V= y=(w, aN e1= UESTC-Digital transmission through the AWGN channel Prof李晓峰 6