JP2019068482A - 送信装置及び受信装置 - Google Patents
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Abstract
Description
まず、本実施例の伝送システムで用いる多重フレームの構成について説明する。
図1は、本実施例の複数変調・時分割多重型伝送システムで用いる多重フレームの構成を示す図である。本発明による実施例の送信装置(図2を参照。詳細については後述する。)は、図1に示す多重フレーム構成を用いることにより、伝送方式及び符号化率を指定し、符号化及び変調を行なう。そして、本発明による実施例の受信装置(図3を参照。詳細については後述する。)は、このフレーム構成に基づいて、復調及び誤り訂正符号の復号を行なう。
図2は、本発明による実施例の送信装置1の構成を示す図である。この送信装置1は、フレーム生成部10、LDPC符号化部11−1,11−2、BCH符号化部11−3,11−4、エネルギー拡散部12,13、スイッチ14、マッピング部15及び時分割多重/直交変調部16を備え、データストリームを送信する場合に、図1に示した多重フレームの信号を生成してから変調波信号を生成するまでの一連の処理を行う。以下、LDPC符号化部11−1,11−2は、単に符号化器とも称し、マッピング部15及び時分割多重/直交変調部16によりマッピング部15で割り当てられたシンボルを変調する処理ブロックを、単に変調器とも称する。
図3は、本発明による実施例の受信装置2の構成を示す図である。この受信装置2は、チャンネル選択部20、直交検波部21、伝送制御信号復号部22、復号器23、エネルギー逆拡散部24及び外符号復号部(BCH復号部)25を備えている。
検査行列Hの符号長N=44880と設定する。また、検査行列HにLDGM構造を適用する。H=[HA|HB]であり、部分行列HAとして、列重みが符号化率毎に大小2種類の値(列重み種類数は3種類以上としてもよい)で構成される行列を適用する。HBは下三角構造を持つ部分行列であり、HBの行重みは1行目が1で残りの行重みは全て2、列重みは全ての列で2(ただし、最後列のみ1)である階段行列である。
送信装置の送信信号生成過程を、図8を参照して説明する。
図10に、本発明による一実施例の受信装置における復号器の処理過程を示す。また、以下の説明では簡単のため、変調方式はBPSKなどの2値変調を想定する。
λ0,i= ln{P(yi|x0,i=0)/P(yi|x0,i=1)}
λ1,i= ln{P(yi|x1,i=0)/P(yi|x1,i=1)}
λ2,i= ln{P(yi|x2,i=0)/P(yi|x2,i=1)}
λ3,i= ln{P(yi|x3,i=0)/P(yi|x3,i=1)}
を計算する。
λ0,i= ln{P(yi|x0,i=0)/P(yi|x0,i=1)}
λ1,i= ln{P(yi|x1,i=0)/P(yi|x1,i=1)}
λ2,i= ln{P(yi|x2,i=0)/P(yi|x2,i=1)}
λ3,i= ln{P(yi|x3,i=0)/P(yi|x3,i=1)}
λ4,i= ln{P(yi|x4,i=0)/P(yi|x4,i=1)}
を計算する。
ステップS401で、送信装置1から送信された変調信号を受信し復調器(即ち、図3に示す直交検波部21)により復調する。
2 受信装置
10 フレーム生成部
11−1,11−2 符号化器(LDPC符号化)
11−3,11−4 外符号符号化部(BCH符号化)
12,13 エネルギー拡散部
14 スイッチ
15 変調マッピング部
16 時分割多重/直交変調部
20 チャンネル選択部
21 直交検波部
22 伝送制御信号復号部
23 復号器(LDPC復号)
24 エネルギー逆拡散部
25 外符号復号部(BCH復号)
Claims (2)
- 請求項1に記載の送信装置により符号化されたデータを、変調方式が32APSK時には逆方向で書き込むように動作するデインターリーブ処理部と、
前記デインターリーブ処理部により処理されたデータを、前記検査行列に基づいてLDPC復号する復号器と、
を備える受信装置。
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CN115189735B (zh) | 2016-06-30 | 2024-03-26 | 松下电器(美国)知识产权公司 | 发送方法以及发送设备 |
US10110256B2 (en) * | 2016-09-16 | 2018-10-23 | Micron Technology, Inc. | Apparatuses and methods for staircase code encoding and decoding for storage devices |
JP6885027B2 (ja) * | 2016-11-18 | 2021-06-09 | ソニーグループ株式会社 | 送信装置、及び、送信方法 |
JP6885030B2 (ja) * | 2016-11-18 | 2021-06-09 | ソニーグループ株式会社 | 送信装置、及び、送信方法 |
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US11012091B2 (en) * | 2017-03-13 | 2021-05-18 | Sony Corporation | Transmitting apparatus and transmission method, receiving apparatus and reception method, and program |
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WO2009031529A1 (ja) | 2007-09-07 | 2009-03-12 | Nippon Hoso Kyokai | 送信装置及び受信装置、並びに送信方法 |
JP5320964B2 (ja) * | 2008-10-08 | 2013-10-23 | ソニー株式会社 | サイクリックシフト装置、サイクリックシフト方法、ldpc復号装置、テレビジョン受像機、及び、受信システム |
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US10020821B2 (en) | 2018-07-10 |
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WO2015072145A1 (ja) | 2015-05-21 |
JPWO2015072145A1 (ja) | 2017-03-16 |
US20160294417A1 (en) | 2016-10-06 |
JP6600429B2 (ja) | 2019-10-30 |
JP6539209B2 (ja) | 2019-07-03 |
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