space-time-frequency coding 空时频编码
differential space-time-frequency coding 差分空时频编码
frequency time coding of pulse 脉冲频率时间编码
frequency-time coding of pulse 脉冲频率时间编码
We mainly introduced several problems related to this system, including bandwidth allocation, system parameters, time-frequency coding and extending, and structure of implementation. Meanwhile its advantages and disadvantages and competition with other schemes are also discussed.
讨论了基于多带OFDM方案的超宽带系统,重点介绍了其频带划分、系统参数、时频编码与时频扩展、实现结构等问题,同时也分析了该方案的优缺点以及与其它方案的竞争态势,并且展望了它在民用和军用领域的应用前景。
参考来源 - 多频段OFDM超宽带系统·2,447,543篇论文数据，部分数据来源于NoteExpress
The technique of wavelet transform has been applied and studied in the image coding field extensively because of its good feature of time-frequency and human visual system.
小波变换技术以其良好的空间—频率局部特性和与人眼视觉特性相符的变换机制，在图像编码领域得到了广泛的应用和研究。
The differential coding is performed in the time domain, while the space-frequency coding is processed in the frequency domain to achieve the diversity ga.
该方法在时域进行差分编码，而在频域进行空频编码以获得分集增益。
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