Two-Dimensional Optical CDMA Systems with Adjustable Bit Power and Code Weight

• Main Authors: Han-Yun Chu, 朱涵筠
• Other Authors: 楊谷章
• Format: Others
• Language: en_US
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/49144183385897008295

碩士 === 國立中興大學 === 電機工程學系所 === 98 === Since transmission technologies of variety of multimedia services, such as data, voice, video, have made great progress recently, using bandwidth efficiently and providing different transmitting rates and qualities of these multimedia services turn into an important research topic. In this thesis, we combine the methods of code-weight variation and power control in order to provide differential quality-of-service (QoS) in multimedia optical code-division multiple access. An approximation model of performance analysis is developed to investigate the interaction of both methods. For illustration, we focus our study on double-weight codes with different bit powers. Our results show that the QoS of double-weight codes can be fine-tuned by controlling both code weight and bit power. Finally, we formulate a procedure for users to select code weights and bit powers in accordance with targeted code performances or the number of transmitting codes.