講演名 2022-10-07
Initial Study on Decoding Methods of LDM Transmission for Satellite Broadcasting System
小泉 雄貴(NHK), 亀井 雅(NHK),
PDFダウンロードページ PDFダウンロードページへ
抄録(和)
抄録(英) We are developing a satellite broadcasting system featuring layered division multiplexing (LDM) transmission that multiplexes multiple modulation signals with different power levels (injection levels (IL)) in the same channel with the aim of providing flexible services in accordance with the receiving environment. LDM consists of an upper layer (UL) with high power and a lower layer (LL) with low power, the combination of which enables the transmission of signals with different bit rates and levels of robustness in the same channel. In this report, we present the decoding methods for UL and LL signals in LDM for a satellite broadcasting system. For the UL signal, two methods are described: one that assume the LL signal as a noise and the other that consider the constellation of the LDM signal combining UL and LL signals. For the LL signal, we propose a method that does not require the UL replica signal generation and subtraction process performed by successive interference cancellation (SIC), a general method to extract an LL signal from a received LDM signal. The proposed method as reference selection (RS) is expected to reduce the computational complexity of the log-likelihood ratio (LLR), a bit certainty used in LDPC decoding. We evaluate the transmission performance of each decoding method for the UL and LL signals by computer simulation and discuss the receiver complexity in these methods including the proposed method.
キーワード(和)
キーワード(英) Layered division multiplexingSatellite broadcastingSuccessive interference cancellationLDPC
資料番号 SAT2022-53
発行日 2022-09-29 (SAT)

研究会情報
研究会 SAT / KOSST
開催期間 2022/10/6(から2日開催)
開催地(和) リファレンス大博多ビル
開催地(英)
テーマ(和) 衛星通信技術及び一般(JC-SAT2022:韓国KOSST連催)
テーマ(英)
委員長氏名(和) 井家上 哲史(明大)
委員長氏名(英) Tetsushi Ikegami(Meiji Univ.)
副委員長氏名(和) 亀井 雅(NHK) / 加保 貴奈(湘南工科大)
副委員長氏名(英) Masashi Kamei(NHK) / Takana Kaho(Shonan Inst. of Tech.)
幹事氏名(和) 阿部 順一(NTT) / 大倉 拓也(NICT)
幹事氏名(英) Junichi Abe(NTT) / Takuya Okura(NICT)
幹事補佐氏名(和) 流田 理一郎(KDDI総合研究所) / 小泉 雄貴(NHK)
幹事補佐氏名(英) Riichiro Nagareda(KDDI Research) / Yuuki Koizumi(NHK)

講演論文情報詳細
申込み研究会 Technical Committee on Satellite Telecommunications / Korea Society of Satellite Technology
本文の言語 ENG
タイトル(和)
サブタイトル(和)
タイトル(英) Initial Study on Decoding Methods of LDM Transmission for Satellite Broadcasting System
サブタイトル(和)
キーワード(1)(和/英) / Layered division multiplexingSatellite broadcastingSuccessive interference cancellationLDPC
第 1 著者 氏名(和/英) 小泉 雄貴 / Yuki Koizumi
第 1 著者 所属(和/英) 日本放送協会(略称:NHK)
NHK(略称:NHK)
第 2 著者 氏名(和/英) 亀井 雅 / Masashi Kamei
第 2 著者 所属(和/英) 日本放送協会(略称:NHK)
NHK(略称:NHK)
発表年月日 2022-10-07
資料番号 SAT2022-53
巻番号(vol) vol.122
号番号(no) SAT-199
ページ範囲 pp.45-49(SAT),
ページ数 5
発行日 2022-09-29 (SAT)