Multi-stage design of DMS filters with free & freeze method

Authors:
Kiyoharu Tagawa;Hoewon Kim
Affiliations:
Faculty of Engineering, Kobe University, Kobe, Japan;Graduate School of Science and Technology, Kobe University, Kobe, Japan
Venue:
ACS'06 Proceedings of the 6th WSEAS international conference on Applied computer science
Year:
2006

Citing 5
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Abstract

The structural design of Double Mode Surface acoustic wave (DMS) filters, which are used widely for modern cellular phones, can be formulated as a combinatorial optimization problem. Even though the local search is usually efficient to solve the combinatorial optimization problem, the running time spent by the local search increases drastically when it is applied to a large-scale problem instance. Therefore, in order to solve the large-scale design problem of complex DMS filter in a short period, a new optimization technique named Free & Freeze method is proposed. Since Free & Freeze method is a kind of the divide-and-conquer method, it divides the search space of an optimization problem into two segments repeatedly, namely free-segment and freeze-segment, considering the problem landscape, and applies an efficient local search to the free-segment intensively.