A Generalized Frequency Assignment Algorithm to Reduce Intermodulation Products in Satellite Communications

Sunghyun HWANG  Sungchan KO  Hyungjin CHOI  

Publication
IEICE TRANSACTIONS on Communications   Vol.E84-B   No.3   pp.614-622
Publication Date: 2001/03/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Satellite and Space Communications
Keyword: 
frequency assignment,  intermodulation product (IMP),  satellite communication,  

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Summary: 
In this paper, we propose a generalized frequency assignment algorithm to minimize the intermodulation products caused by nonlinear amplification in satellite transponder. We also analyze the performance of proposed algorithms in terms of C/IM and execution time. Most of the published algorithms are too restrictive to be applied to the frequency planning of many realistic systems that are usually characterized by multi-level and/or multi-bandwidth. In developing the proposed "TDTI algorithm," we utilized and modified basic concepts of Okinaka's DELINS-INSDEL algorithm to extend its applicability from one-level systems to more general systems. We also propose a modified version of TDTI algorithm called "WTDI-SDELINS" to circumvent the problem of relatively long execution time.