Space-Time codes for Uneqaul Error Protection

• Main Authors: Shian-Jiun Chiou, 邱顯鈞
• Other Authors: Chung-Hsuan Wang
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/79251116988964907463

碩士 === 中原大學 === 電子工程研究所 === 92 === With the progress of science and society, the demands for wireless multimedia services increase rapidly. However, the signals transmitted over wireless channels usually experience serious distortion due to the corruption of multipath fading and thermal noise. Space-time codes, which combine both of the spatial and temporal diversities, have been shown to provide excellent performance against the fading effect. Coding techniques for unequal error protection (UEP), which can provide different protecting efforts with respect to different protection requirements, can make the best use of channel bandwidth in many practical applications. In this thesis, space-time codes are combined with UEP for channel coding of high-rate wireless multimedia communications. We study the UEP capabilities of space-time codes from an algebraic viewpoint. The performance analysis together with some design criteria of the UEP space-time codes are presented. We also propose several schemes for constructing the space-time codes of powerful UEP capabilities, based on which tables of good UEP codes with various rates and memories are given.