共 3 条
- [1] The detection of two modulated waves which differ slightly in carrier frequency [J]. PROCEEDINGS OF THE INSTITUTE OF RADIO ENGINEERS, 1931, 19 (01): : 0120 - 0137
- [2] COURANT, METHODEN MATH PHYS, V1, P55
- [3] PETERSON, 1930, P IRE, V18, P38