Title :
Effects of multipath interference on an FM data subcarrier
Author :
Zeger, Linda ; Chen, Pei ; Kobayashi, Hisashi
Author_Institution :
Dept. of Electr. Eng., Princeton Univ., NJ, USA
Abstract :
There is renewed interest in utilizing the upper portion of the baseband spectrum of an FM broadcast channel for a digital data service. This part of the baseband spectrum was previously unused by the audio signal. In the presence of multipath interference, the instantaneous frequency of the received FM signal is a nonlinear combination of the instantaneous frequency of the transmitted signal and its time delayed versions. Due to this nonlinearity, the audio and data signals are no longer confined to separate parts of the baseband spectrum. Correct reception of the data signal is then limited by the effects of multipath interference from the audio signals. In this paper we formulate the multipath interference problem, and present some preliminary analysis and simulation results
Keywords :
adjacent channel interference; data communication; digital audio broadcasting; frequency modulation; multipath channels; subcarrier multiplexing; FM broadcast channel; FM data subcarrier; audio signal; baseband spectrum; digital data service; instantaneous frequency; multipath interference; nonlinearity; reception; transmitted signal; Analytical models; Baseband; Data communication; Data engineering; Delay effects; Digital audio broadcasting; Frequency modulation; Interference; Radio broadcasting; Signal analysis;
Conference_Titel :
Communications, Computers and Signal Processing, 1997. 10 Years PACRIM 1987-1997 - Networking the Pacific Rim. 1997 IEEE Pacific Rim Conference on
Conference_Location :
Victoria, BC
Print_ISBN :
0-7803-3905-3
DOI :
10.1109/PACRIM.1997.619898
