Research on Spread-Spectrum Modulation and Demodulation System Using Real-Valued Orthogonal Pseudonoise Sequences

利用实值正交伪噪声序列的扩频调制解调系统研究

• 批准号: 02650249
• 负责人: TANADA Yoshihiro
• 金额: $ 1.41万
• 依托单位: Kagoshima University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1991
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02650249/
• 关键词: Real-valued orthogonal pseudonoise sequence; Amplitude-modulated code; Pulse-width-modulated code; Spread-spectrum communication; Quasi-synchronous SSMA; Digital correlation processing; Process gain; Desired to undesired signal ratio; DU比; スペクトル拡

This research has been performed from 1990 to 1991, for the purpose of developing spread-spectrum modulation and demodulation system using real-valued orthogonal pseudonoise sequences with the better crosscorrelation properties than those of M-sequences and of urging the practical application of this system to high-quality spread-spectrum communication system. The process from design to experiment has been investigated to be understandable for the engineers in this field.It is shown that the synchronous or quasi-synchronous spread-spectrum transmission of the amplitude-modulated code and the pulse-width-modulated code enables multichannel interference suppressed to the low level according to theory. The experimental system adopts digital signal processing at a low frequency range, but a high-speed special processor will realize a practical system of high bit rate. The achievements of this project are the followings.(1)Design of modulation and demodulation systemAn amplitude-modulated c … More ode and a pulse-width-modulated code as well as correlation processing are designed so that multichannel interference does not occur in a synchronous or quasi-synchronous spread-spectrum multiple access. Effects of quantization error, additive noise and frequency band on correlator output are made clear through analysis and simulation.(2)Construction of modulation and demodulation systemIn the constructed system, the amplitude-modulated code or the pulse-width-modulated code due to the real-valued pseudonoise sequences of 256 length, passes through a band-pass transmission channel and is demodulated by a front- or back-end digital correlator based on the fast Fourier transform.(3)Experiment for estimating modulation and demodulation systemWhen two different codes are multiplexed and demodulated along with additive noise, correlator output waveform, process gain, improvement ratio of desired to undesired signal ratio and bit error rate show the high performance of the values close to theory. Less

这项研究是从1990年到1991年进行的，目的是使用实现的正交伪序列序列开发扩散光谱调制和解调系统，该序列具有比M序列更好的互相关性能，并敦促该系统在高质量的传播通信系统中实践该系统的实践。已经研究了从设计到实验的过程，对于该领域的工程师来说是可以理解的。这表明，放大器调制的代码的同步或同步传播传播的传播以及脉冲宽度调制的代码启用多元渠道的多元渠道抑制至低水平的抑制作用。实验系统在低频范围内调整数字信号处理，但是高速特殊处理器将实现一个实用的高比特速率系统。该项目的成就是以下内容。（1）设计和解调系统的设计系统放大器调制的C…更多的ODE和脉冲宽度调节的代码以及相关处理的设计，因此在同步或Quasi-SynChronous Sprolenconous Sprenchrum sprospectrum多次访问中不会出现多级通道干扰。 Effects of quantization error, additive noise and frequency band on correlator output are made clear through analysis and simulation.(2)Construction of modulation and demodulation systemIn the constructed system, the amplifier-modulated code or the pulse-width-modulated code due to the real-valued pseudonoise sequences of 256 length, passes through a band-pass transmission channel and is demodulated by a front- or back-end digital correlator based on the fast Fourier （3）估计调节和解调系统的实验，当两个不同的代码多重编码并解调以及添加剂噪声，相关器输出波形，过程增益，所需的不希望信号比率的改进比和位错误率显示出接近理论的值的高度性能。较少的

项目成果

棚田 嘉博: "パルス圧縮多重ソ-ナに適用した実数谷交PN系列の実験的検証" 電子情報通信学会論文誌(BーII). J74ーBーII. 215-224 (1991)

Yoshihiro Tanada：“应用于脉冲压缩多路复用声纳的真实谷交叉 PN 序列的实验验证”电子、信息和通信工程师学会会刊 (B-II) (J74-B-II)。

棚田 嘉博: "実数直交擬似雑音系列を用いた画像の符号化スクランブル伝送" 電子情報通信学会技術研究報告. SSTA90ー36. 15-22 (1990)

Yoshihiro Tanada：“使用真实正交伪噪声序列编码图像的扰乱传输” IEICE 技术报告 15-22 (1990)。

棚田 嘉博: "実数直交PN符号の変復調処理" 情報理論とその応用学会第14回シンポジウム論文集. 14ーSAーBーIIー2. 657-660 (1991)

Yoshihiro Tanada：“实正交 PN 码的调制和解调处理”信息理论与应用学会第 14 届研讨会论文集 14-SA-B-II-2 (1991)。

Yoshihiro TANADA: "Experimental Verification of Real‐Valued Orthogonal PN Sequence Applied to Pulse Compression Sonar" Electronics and Communications in Japan,Part1. (1992)

Yoshihiro TANADA：“实值正交 PN 序列应用于脉冲压缩声纳的实验验证”，日本电子与通信，第 1 部分（1992 年）。

棚田 嘉博: "実数直交擬似雑音系列を用いた画像の符号化・スクランブル伝送" 電子情報通信学会技術研究報告. SSTA90ー36. 15-22 (1990)

Yoshihiro Tanada：“使用真实正交伪噪声序列的图像编码和加扰传输”IEICE 技术报告 15-22 (1990)。