The TD/ CDMA (TDD), FDD and particularly TD-SCDMA technologies are presented with brief introductions and comparisons in terms of technical background and application environments.
本文首先从技术背景和应用环境等方面对TD/CDMA（TDD）和FDD，特别是中国提交的TD—SCDMA技术作了介绍和比较。
The TD/ CDMA (TDD), FDD and particularly TD-SCDMA technologies are presented with brief introductions and comparisons in terms of technical background and application environments.
本文首先从技术背景和应用环境等方面对TD/CDMA（TDD）和FDD，特别是中国提交的TD—SCDMA技术作了介绍和比较。
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