Design of multiweight unipolar codes for multimedia optical CDMA applications based on pairwise balanced designs
Design of multiweight unipolar codes for multimedia optical CDMA applications based on pairwise balanced designs
复制标题
DOI：
10.1109/jlt.2003.816819
复制
发表时间：
2003-09
影响因子：
4.7
通讯作者：
I. Djordjevic;B. Vasic;J. Rorison
中科院分区：
文献类型：
--
作者：
I. Djordjevic;B. Vasic;J. Rorison
提出了一类新的等长变重光正交码，它可以支持不同数据速率和服务质量要求的多媒体业务。该构造基于成对平衡设计，或者更具体地说，基于整数格上定义的关联结构。所提出的码适用于多媒体环境中的频谱幅度编码、快速跳频和时间扩展编码。提出了一种新的双平衡解码器，能够消除多媒体应用中的多用户干扰的频谱幅度编码方案采用单极码具有非固定的同相互相关。
A novel class of constant-length variable-weight optical orthogonal codes is proposed that can support multimedia services with different data rates and quality-of-service requirements. The construction is based on the pairwise balanced designs, or more specifically, on an incidence structure defined on an integer lattice. Proposed codes are suitable for spectral-amplitude coding, fast-frequency hopping, and time-spreading encoding in multimedia environment. A novel dual-balanced decoder is proposed capable of canceling multiuser interference in multimedia applications for spectral-amplitude-coding schemes employing the unipolar codes having nonfixed in-phase cross correlation.