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- The main purpose is to study further in the constant envelope and Quasi-constant envelope modulations with high modulation efficiency. 主要研究适合深空信道传输的具有恒定或准恒定包络的高效数字调制方式与直接序列扩频相结合的组合调制解调方式。
- Constant envelope modulation 恒包络调制
- Using the concept of constant envelope(CE),a novel modulation scheme CE-OFDM-CPM is proposed in this paper. The PAPR of OFDM-CPM can be reduced to 0 dB. 利用恒包络的概念提出一种新的CE-OFDM-CPM调制方案,可以把OFDM-CPM系统的PAPR降至零分贝。
- The PAPR problem can be suppressed due to constant envelope property of the added sequence in time domain. 此外，领航符元经由反离散傅立叶转换后在时域具有等振福的性质，能有效的抑制峰值对平均功率比。
- Carrier Envelope Modulation ( CEM ) 载波包络调制
- modulated constant envelope signal 已调的恒定包络信号
- His wife was a constant inspiration to him. 他的妻子经常鼓励他。
- We use simulation and measurement to verify the LINC transmitter superior to a single Class-A power amplifier on both linearity and efficiency when a variable envelope modulated signal is used. 我们也使用模拟以及实作量测去验证当时变振福的调变讯号被发送时，LINC发射器可以在线性度和效率上优于单一个A类线性功率放大器。
- Have you stuck down the back of the envelope? 信封背面开口处贴牢了吗？
- Her constant complaining just sticks in my craw. 她那不断的诉苦真使我受不了。
- He steamed the stamp off the envelope. 他用蒸汽把信封上的邮票揭下来。
- The machinery requires constant maintenance. 这些机器需要经常保养维修。
- He glued a stamp onto the envelope. 他把邮票贴在信封上。
- I was infuriated by/with their constant criticism. 他们没完没了地批评把我给气坏了。
- As he picked up the envelope, a key dropped out. 他拣起信封时，一把钥匙掉了出来。
- As she picked up the envelope, a key dropped out. 她拾起信封时，一把钥匙掉了出来。
- Put a stamp on the envelope, will you? 在信封上贴张邮票，好吗？
- A constant, variable, function name, or expression. 一种常数、变量、函数名或表达式。
- She feels wearisome by the constant noise. 她很厌烦那些没完没了的嘈杂声。
- He stuck a stamp on the envelope. 他在信封上贴上邮票。
