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JP2005354674A5
JP2005354674A5 JP2005140579A JP2005140579A JP2005354674A5 JP 2005354674 A5 JP2005354674 A5 JP 2005354674A5 JP 2005140579 A JP2005140579 A JP 2005140579A JP 2005140579 A JP2005140579 A JP 2005140579A JP 2005354674 A5 JP2005354674 A5 JP 2005354674A5
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送信側と受信側との間で符号化変調により情報の伝送を行う符号化変調復調方法であって、
前記送信側は、
伝送情報ビット列をカオス生成器に入力して符号化信号系列を生成し、符号化変調方式のカオス伝送信号系列として前記受信側へ伝送するカオス伝送信号系列生成ステップを備え、
前記受信側は、
推定送信系列を生成する推定送信系列生成ステップと、
前記推定送信系列を入力として前記送信側の前記カオス伝送信号系列生成ステップと同一の処理により推定伝送信号系列を生成する推定伝送信号系列生成ステップと、
前記送信側より受信した受信信号系列と前記推定伝送信号系列との誤差を計算し、その最小誤差を与える推定送信系列を前記受信信号系列の復号結果として出力する復号ステップと
を備え、
前記送信側における前記カオス伝送信号系列生成ステップは、
前記伝送情報ビット列と帰還されたカオス系列とを入力として所定の入力側演算を施すことにより入力信号系列を生成する入力側演算ステップと、
前記入力信号系列を入力として前記カオス生成器によりカオス系列を生成するカオス系列生成ステップと、
前記カオス系列を入力として所定の出力側演算を施すことにより前記カオス伝送信号系列を生成する出力側演算ステップと
を備え、
前記受信側における前記推定伝送信号系列生成ステップは、
前記推定送信系列と帰還された推定カオス系列とを入力として前記送信側と同一の入力側演算を施すことにより推定入力信号系列を生成する入力側演算ステップと、
前記推定入力信号系列を入力として前記送信側と同一のカオス生成器により推定カオス系列を生成する推定カオス系列生成ステップと、
前記推定カオス系列を入力として前記送信側と同一の出力側演算を施すことにより推定伝送信号系列を生成する出力側演算ステップと
を備えたことを特徴とするカオス符号化変調復調方法。 A coded modulation demodulation method for transmitting information by coded modulation between a transmitting side and a receiving side,
The sender side
A transmission information bit sequence is input to a chaos generator to generate a coded signal sequence, and a chaos transmission signal sequence generation step for transmitting to the reception side as a chaos transmission signal sequence of a coded modulation scheme is provided,
The receiving side
An estimated transmission sequence generating step for generating an estimated transmission sequence;
An estimated transmission signal sequence generating step for generating an estimated transmission signal sequence by the same processing as the chaotic transmission signal sequence generating step on the transmission side with the estimated transmission sequence as an input;
A decoding step of calculating an error between the received signal sequence received from the transmitting side and the estimated transmission signal sequence, and outputting an estimated transmission sequence that gives the minimum error as a decoding result of the received signal sequence , and
The chaotic transmission signal sequence generation step on the transmission side includes:
An input-side operation step of generating an input signal sequence by performing a predetermined input-side operation with the transmission information bit string and the fed back chaotic sequence as inputs; and
A chaos sequence generation step of generating a chaos sequence by the chaos generator with the input signal sequence as an input; and
An output side computation step for generating the chaotic transmission signal sequence by performing a predetermined output side computation with the chaos sequence as an input; and
With
The estimated transmission signal sequence generation step on the receiving side includes:
An input side calculation step of generating an estimated input signal sequence by performing the same input side calculation as the transmission side with the estimated transmission sequence and the feedback estimated chaotic sequence as inputs,
An estimated chaos sequence generating step for generating an estimated chaos sequence by the same chaos generator as the transmission side with the estimated input signal sequence as an input;
A chaotic coded modulation / demodulation method comprising: an output-side operation step of generating an estimated transmission signal sequence by performing the same output-side operation as that of the transmitting side with the estimated chaotic sequence as an input . 前記所定の入力側演算ｆは、数式ｆ（ｋ，ｓ １ （ｋ−１））＝ｓ １ （ｋ−１）で表される（但し、ｓ １ はカオス生成器への入力信号系列を表し、ｋ＝０，１，…である。）ことを特徴とする請求項１に記載のカオス符号化変調復調方法。 The predetermined input-side operation f is expressed by the formula f (k, s 1 (k−1)) = s 1 (k−1) (where s 1 represents an input signal sequence to the chaos generator). , K = 0, 1,...) , The chaotic coded modulation and demodulation method according to claim 1. 前記所定の出力側演算ｈは、以下の数式で表されることを特徴とする請求項２に記載のカオス符号化変調復調方法。
Figure 2005354674
 但し、ｂはディジタルの伝送情報ビット列｛０，１｝を表し、ｎ，ｋ＝０，１，…である。 3. The chaotic coded modulation / demodulation method according to claim 2 , wherein the predetermined output-side operation h is expressed by the following equation .
Figure 2005354674
 However, b represents a digital transmission information bit string {0, 1}, where n, k = 0, 1,. 前記ｓ ２ （ｋ）は、以下の数式で表されることを特徴とする請求項３に記載のカオス符号化変調復調方法。
Figure 2005354674
 The chaotic coded modulation / demodulation method according to claim 3 , wherein the s 2 (k) is expressed by the following mathematical formula .
Figure 2005354674
 前記カオス生成器は、円環状カオスの生成方程式を用いて、初期値をｘ 0 ＝Ｒｅ［ｓ i （ｋ）］，ｙ 0 ＝Ｉｍ［ｓ i （ｋ）］とし、以下の数式で表わされるものとしたことを特徴とする請求項２乃至４のいずれかに記載のカオス符号化変調復調方法。
Figure 2005354674
 ｓ1（ｋ）＝ｘ20＋ｊｙ20 The chaos generator uses an annular chaos generation equation, with initial values x 0 = Re [s i (k)], y 0 = Im [s i (k)], and is expressed by the following equation: chaotic coded modulation demodulating method according to any one of claims 2 to 4, characterized in that a thing.
Figure 2005354674
 s 1 (k) = x 20 + ji 20 前記所定の出力側演算ｈは、以下の数式で表されることを特徴とする請求項２に記載のカオス符号化変調復調方法。
Figure 2005354674
 但し、ｂはディジタルの伝送情報ビット列｛０，１｝を表し、ｎ，ｋ＝０，１，…である。 3. The chaotic coded modulation / demodulation method according to claim 2 , wherein the predetermined output-side operation h is expressed by the following equation .
Figure 2005354674
 However, b represents a digital transmission information bit string {0, 1}, where n, k = 0, 1,. 前記所定の出力側演算ｈは、以下の数式で表されることを特徴とする請求項２に記載のカオス符号化変調復調方法。
Figure 2005354674
 但し、ｂはディジタルの伝送情報ビット列｛０，１｝を表し、ｎ，ｋ＝０，１，…である。 3. The chaotic coded modulation / demodulation method according to claim 2 , wherein the predetermined output-side operation h is expressed by the following equation .
Figure 2005354674
 However, b represents a digital transmission information bit string {0, 1}, where n, k = 0, 1,. 前記出力側演算は、前記カオス系列から振幅、位相とも疑似雑音的に変化するカオス伝送信号系列を生成することを特徴とする請求項１乃至７のいずれかに記載のカオス符号化変調復調方法。 8. The chaotic coded modulation / demodulation method according to claim 1, wherein the output side operation generates a chaotic transmission signal sequence in which both amplitude and phase change in a pseudo-noise manner from the chaotic sequence . 前記出力側演算は、前記カオス系列から振幅又は位相のいずれか一方のみが変化するカオス伝送信号系列を生成することを特徴とする請求項１乃至７のいずれかに記載のカオス符号化変調復調方法。 8. The chaotic coded modulation / demodulation method according to claim 1, wherein the output side operation generates a chaotic transmission signal sequence in which only one of amplitude or phase changes from the chaotic sequence. . 前記受信側における前記復号ステップは、所定の長さｖｌ以上の各系列に対して、復号拘束長を１増加させる毎に前記推定伝送信号系列を１／２ずつ廃棄して前記誤差計算を行うことを特徴とする請求項１乃至９のいずれかに記載のカオス符号化変調復調方法。 The decoding step on the receiving side performs the error calculation by discarding the estimated transmission signal sequence by ½ each time the decoding constraint length is increased by 1 for each sequence having a predetermined length vl or more. A chaotic code modulation demodulation method according to any one of claims 1 to 9 . 送信側と受信側との間で符号化変調により情報の伝送を行う符号化変調復調方法であって、
前記送信側は、
伝送情報ビット列をカオス生成器に入力して符号化信号系列を生成し、符号化変調方式のカオス伝送信号系列として前記受信側へ伝送するカオス伝送信号系列生成ステップを備え、
前記受信側は、
推定送信系列を生成する推定送信系列生成ステップと、
前記推定送信系列を入力として前記送信側の前記カオス伝送信号系列生成ステップと同一の処理により推定伝送信号系列を生成する推定伝送信号系列生成ステップと、
前記送信側より受信した受信信号系列と前記推定伝送信号系列との誤差を計算し、その最小誤差を与える推定送信系列を前記受信信号系列の復号結果として出力する復号ステップと
を備え、
前記受信側における前記復号ステップは、所定の長さｖｌ以上の各系列に対して、復号拘束長を１増加させる毎に前記推定伝送信号系列を１／２ずつ廃棄して前記誤差計算を行うことを特徴とするカオス符号化変調復調方法。 A coded modulation demodulation method for transmitting information by coded modulation between a transmitting side and a receiving side,
The sender side
A transmission information bit sequence is input to a chaos generator to generate a coded signal sequence, and a chaos transmission signal sequence generation step for transmitting to the reception side as a chaos transmission signal sequence of a coded modulation scheme is provided,
The receiving side
An estimated transmission sequence generating step for generating an estimated transmission sequence;
An estimated transmission signal sequence generating step for generating an estimated transmission signal sequence by the same processing as the chaotic transmission signal sequence generating step on the transmission side with the estimated transmission sequence as an input;
A decoding step of calculating an error between the received signal sequence received from the transmitting side and the estimated transmission signal sequence, and outputting an estimated transmission sequence giving the minimum error as a decoding result of the received signal sequence;
With
The decoding step on the receiving side performs the error calculation by discarding the estimated transmission signal sequence by ½ each time the decoding constraint length is increased by 1 for each sequence having a predetermined length vl or more. A chaotic coded modulation and demodulation method characterized by the above. 前記受信側における前記復号ステップは、復号拘束長を可変的に設定することを特徴とする請求項１乃至１１のいずれかに記載のカオス符号化変調復調方法。 12. The chaotic coding modulation demodulation method according to claim 1, wherein the decoding step on the receiving side variably sets a decoding constraint length . 前記受信側における前記復号ステップは、復号ビットの確からしさの尺度に基づいて前記復号拘束長を可変的に設定することを特徴とする請求項１２に記載のカオス符号化変調復調方法。 13. The chaotic coding modulation demodulation method according to claim 12 , wherein the decoding step on the receiving side variably sets the decoding constraint length based on a measure of the probability of decoding bits . 前記受信側における前記復号ステップは、前記推定送信系列における復号ビットを０とした場合の前記受信信号系列との最小誤差ｄ ０ と、前記復号ビットを１とした場合の最小誤差ｄ １ とを比較し、前記最小誤差ｄ １ の方が小さい場合は前記復号ビットを１と復号し、前記最小誤差ｄ ０ の方が小さい場合は前記復号ビットを０と復号することを特徴とする請求項１乃至１３のいずれかに記載のカオス符号化変調復調方法。 Said decoding step in the receiver side, compared the estimated transmission minimum error d between the received signal sequence when decoded bits in the sequence is set to 0 0 and a minimum error d 1 in the case where the decoded bits and 1 The decoded bit is decoded as 1 when the minimum error d 1 is smaller, and the decoded bit is decoded as 0 when the minimum error d 0 is smaller. 14. The chaos coding modulation demodulation method according to any one of the above. 前記受信側における前記復号ステップは、前記最小誤差ｄThe decoding step at the receiving side includes the minimum error d. ０0 と前記最小誤差ｄAnd the minimum error d １1 との差の絶対値を０以上の閾値と比較し、前記差の絶対値が前記閾値以上の場合は復号を行い、前記閾値未満の場合は復号拘束長を増加させて前記最小誤差ｄThe absolute value of the difference between the difference is compared with a threshold value greater than or equal to 0. If the absolute value of the difference is greater than or equal to the threshold value, decoding is performed. ０0 、ｄ, D １1 を再計算することを特徴とする請求項１４に記載のカオス符号化変調復調方法。The chaos coded modulation / demodulation method according to claim 14, wherein the chaos is recalculated. 前記送信側における前記カオス伝送信号系列生成ステップは、複数のカオス生成器を用いて、前記伝送情報ビットの値によって異なるカオス生成器によりカオス伝送信号系列を生成することを特徴とする請求項１乃至１５のいずれかに記載のカオス符号化変調復調方法。The chaotic transmission signal sequence generation step on the transmission side uses a plurality of chaos generators to generate a chaos transmission signal sequence using a chaos generator that varies depending on the value of the transmission information bit. 15. The chaos coding modulation demodulation method according to any one of 15. 前記送信側における前記カオス伝送信号系列生成ステップは、縦続又は並列或いはこれらの組合わせにより接続された複数のカオス生成器を用いて前記カオス伝送信号系列を生成することを特徴とする請求項１乃至１６のいずれかに記載のカオス符号化変調復調方法。2. The chaotic transmission signal sequence generation step on the transmission side generates the chaotic transmission signal sequence using a plurality of chaos generators connected in cascade, parallel, or a combination thereof. 16. The method for demodulating chaotic coded modulation according to any one of 16 above. 前記送信側における前記カオス伝送信号系列生成ステップは、The chaotic transmission signal sequence generation step on the transmission side includes:
前記カオス伝送信号系列をパケット化すると共に前記カオス生成器によるカオス系列の生成を一旦終了して前記カオス生成器を初期化するパケット化ステップを含むことを特徴とする請求項１乃至１７のいずれかにカオス符号化変調復調方法。    The packetizing step for packetizing the chaotic transmission signal sequence and temporarily terminating the generation of the chaotic sequence by the chaotic generator to initialize the chaotic generator. And chaotic coded modulation demodulation method. 前記パケット化ステップは、前記各パケットを終端させる際にテールビットを挿入することを特徴とする請求項１８に記載のカオス符号化変調復調方法。19. The chaotic coded modulation and demodulation method according to claim 18, wherein in the packetizing step, tail bits are inserted when terminating each packet. 前記カオス伝送信号系列生成ステップの前又は後に実行され且つ雑音的に変化する変調信号を許容する他方式の符号化ステップを更に備えたことを特徴とする請求項１乃至１９のいずれかに記載のカオス符号化変調復調方法。The encoding method according to any one of claims 1 to 19, further comprising an encoding step of another method that is executed before or after the chaotic transmission signal sequence generation step and allows a modulation signal that changes in a noise manner. Chaos coded modulation demodulation method.
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