Presentation 2021-11-04
SDR Implementation of Analog FM Broadcast Multipath Filter
Kenji Rikitake,
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) Reduction of the reception degradation caused by multipath propagation is essential for the high-quality reception of analog FM broadcast. Previous reports show adaptive filters effectively solve this issue, but the implementation details are not well-described. In this report, the author explains the details of an open-source SDR implementation that applies a complex NLMS filter to the IF output developed by the author. The author also describes the critical points to consider for the development and the evaluation of the improved reception results by the multipath filter. Experiments showed that the proposed multipath filter reduced the THD+N of an 880Hz time tone signal broadcast from 1.22% to 0.33% and that the multipath filter effectively improved the reception quality for simple antenna installations.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) Multipath / adaptive filter / FM broadcast / SDR
Paper # SR2021-43
Date of Issue 2021-10-28 (SR)

Conference Information
Committee SR
Conference Date 2021/11/4(2days)
Place (in Japanese) (See Japanese page)
Place (in English) Online
Topics (in Japanese) (See Japanese page)
Topics (in English) Software Defined Radio, Cognitive Radio, Spectrum Shareing, etc.
Chair Suguru Kameda(Hiroshima Univ.)
Vice Chair Osamu Takyu(Shinshu Univ.) / Kentaro Ishidu(NICT) / Kazuto Yano(ATR)
Secretary Osamu Takyu(Mie Univ.) / Kentaro Ishidu(Tokai Univ.) / Kazuto Yano(NTT)
Assistant Mai Ohta(Fukuoka Univ.) / Taichi Ohtsuji(NEC) / WANG Xiaoyan(Ibaraki Univ.) / Akemi Tanaka(MathWorks)

Paper Information
Registration To Technical Committee on Smart Radio
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) SDR Implementation of Analog FM Broadcast Multipath Filter
Sub Title (in English)
Keyword(1) Multipath
Keyword(2) adaptive filter
Keyword(3) FM broadcast
Keyword(4) SDR
1st Author's Name Kenji Rikitake
1st Author's Affiliation Kenji Rikitake Professional Engineer's Office/Pepabo R&D Institute, GMO Pepabo, Inc.(KRPEO/Pepabo R&D Institute)
Date 2021-11-04
Paper # SR2021-43
Volume (vol) vol.121
Number (no) SR-227
Page pp.pp.17-24(SR),
#Pages 8
Date of Issue 2021-10-28 (SR)