数字信号无码间干扰传输准则是（)A.fb＝fc;B.fb＝２fc;C.fb＞２fc;D.fb＜fc;

数字信号无码间干扰传输准则是()

A.fb＝fc;

B.fb＝２fc;

C.fb＞２fc;

D.fb＜fc;

请帮忙给出正确答案和分析，谢谢！