Title :
Intermodulation and harmonic analysis for land mobile radio communications
Author_Institution :
Spectrum Eng. Branch, Ind. Canada, Ottawa, Ont., Canada
Abstract :
Intermodulation (IM) and harmonic products are caused by non-linear mixing of signals at the RF stages of radio systems. Interference due to IM and harmonic products is usually of concern especially where antennas are located in close vicinity. This paper deals with IM and harmonic products of two and three impinging signals. Interference analysis are presented for: two-signal third-order IM, two-signal fifth-order IM, three-signal third-order IM, three-signal fifth-order IM, as well as second-order and third-order harmonics. The capabilities of the assignment and licensing systems (ALS) have been extended to handle harmonics and IM products up to three-signal fifth-order. Examples of IM conflicts in the land mobile frequency bands are presented
Keywords :
harmonic analysis; interference suppression; intermodulation; land mobile radio; radiofrequency interference; RF stages; antennas; assignment and licensing systems; harmonic analysis; intermodulation; land mobile radio communications; nonlinear mixing; radio systems; second-order third-order harmonic; third-order harmonics; three-signal fifth-order case; three-signal third-order case; two-signal fifth-order case; two-signal third-order case; Harmonic analysis; Interference; Land mobile radio; Licenses; Mobile communication; RF signals; Radio frequency; Radio transmitters; Signal analysis; Transfer functions;
Conference_Titel :
Vehicular Technology Conference, 1998. VTC 98. 48th IEEE
Conference_Location :
Ottawa, Ont.
Print_ISBN :
0-7803-4320-4
DOI :
10.1109/VETEC.1998.686581
