TD-SCDMA与WCDMA高速移动性能分析
首发时间:2007-03-27
摘要:由于具有系统容量大、保密性能好、通话质量高、频谱规划简单等优点,第三代移动通信系统(3G)的发展得到了多方面的关注。WCDMA、TD-SCDMA和cdma2000是目前3G的主流技术。TD-SCDMA系统由于帧结构和信道估计方法的限制,抗拒快衰落和多普勒效应的能力低于连续传输的FDD系统。本文描述了TD-SCDMA系统的信道估计方法,在理想信道估计下比较了TD-SCDMA与WCDMA系统高速移动下的性能并提出了增强TD-SCDMA系统性能的措施。
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High-speed mobile performance analysis of TD-SCDMA and WCDMA
Abstract:The third generation mobile communication system has many advantages, such as large capability, good secrecy ability, high voice quality, simple frequency layout ability and so on, the development of it has attracted much attention. WCDMA, TD-SCDMA and cdma2000 are the mainstream technologies in the third mobile communication system. Because of the frame structure and the channel estimation method, TD-SCDMA’s ability to resist fast fading and Doppler is lower than FDD system. The thesis describes the channel estimation method of TD-SCDMA, analyzes the performance of TD-SCDMA and WCDMA when the speed is high, and proposes some methods to enhance the performance of TD-SCDMA.
Keywords: TD-SCDMA WCDMA channel estimation frame structure
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No.1170810188311749****
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