Title :
A classical method of evaluating co-channel and adjacent channel interference in digital FM
Author_Institution :
Northern Telecom Inc., Richardson, TX, USA
Abstract :
The mechanism of interference between two FSK modulated signals is examined. It is shown that the deviation in the instantaneous frequency due to interference causes a corresponding deviation in the eye opening, thereby resulting in a corresponding degradation in the signal to noise ratio (SNR). This analogy is then used to derive the C/I performance as a function of the eye opening. The analysis applies to FSK, MSK and GMSK modulation schemes
Keywords :
adjacent channel interference; cochannel interference; frequency modulation; frequency shift keying; minimum shift keying; C/I performance; FSK modulated signals; GMSK; MSK; SNR; adjacent channel interference; cochannel interference; digital FM; eye opening deviation; instantaneous frequency; signal to noise ratio; Degradation; Digital modulation; Frequency modulation; Frequency shift keying; Helium; Interchannel interference; Lakes; Postal services; Signal to noise ratio; Telecommunications;
Conference_Titel :
Military Communications Conference, 1995. MILCOM '95, Conference Record, IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-2489-7
DOI :
10.1109/MILCOM.1995.483395
