Compare the capability of high-frequency signals and low-frequency signals in straight-line propagation, reflection, refraction, and diffraction. Among unipolar NRZ-L, Polar NRZ-L, NRZ-I, and RZ,...

Compare the capability of high-frequency signals and low-frequency signals in straight-line propagation, reflection, refraction, and diffraction.

Among unipolar NRZ-L, Polar NRZ-L, NRZ-I, and RZ, Manchester, differential Manchester, AMI, and MLT-3, which schemes have no issues on synchronization, baseline wandering, and DC components, respectively?