| 1. | Design and simulations of an enhanced fm - dcsk system based on woven codes
系统在衰落信道下的性能分析 |
| 2. | Performance of wireless multimedia ds - cdma diversity receiver in fading channel
无线多媒体直扩分集系统在衰落信道下的性能研究 |
| 3. | The closed - form expressions of the detection and false - alarm probabilities and mean acquisition time are derived for the hybrid acquisition scheme with two fixed threshold
本文分析了在多址干扰下，在衰落信道中，基于相关器解扩的串并混合双dwell固定门限检测方案的性能。 |
| 4. | 2 it is so hard to think of this nation in decline when you know that there are vast regions of the planet which are absolutely paralyzed , incapable of any improvement at all
如果你知道世界上有广大地区完全处于瘫痪状态，无法取得任何进步时，那就难以想象这个国家在衰落。 |
| 5. | Through sight and thinking of modem intellectual returning to native place , orchard city stories told of some stories and people about orchard city when it have been come downing
摘要《果园城记》是通过一个还乡的知识者（ “我” ）的所见、所闻、所感，写出了小城在衰落过程中出现的人、景、物、事。 |
| 6. | Today , most people realize the importance of protecting the ancient residence , but the old housing has being declining . on the other hand , local residents are building the new residence passionfully
在保护古民居意识不断提高的今天，一边大部分老房子一直在衰落，一边建设新居高潮不断，当地的居民似乎不在乎传统。 |
| 7. | Coded modulation technique is a way that combines coding technique with modulation technique to get coding gain in the instance of keeping the power efficiency and frequency efficiency but increasing the complexity of equipment
解决这一问题的一种有效方法是利用交织技术与编码调制相结合,以此获得在衰落信道下性能的提高。 |
| 8. | This thesis first studied the communication system with detailed theories so that to choose the appropriate method of modulation and demodulation . n / 4dqpsk is a kind of modulation method which is appropriate to transfer in the attenuated channel
/ 4dqpsk是一种比较适合在衰落信道中传输的调制方式，它不需要提取相干载波，因而不存在相位模糊、环路跳周等问题。 |
| 9. | With criterion of minimized average energy and criterion of maximized minimum euclidean distance as the basic policies , we determined the optimization mechanism of star - qam constellation in ofdm system with fading channel and using quasi - coherentand demodulation
我们以平均能量最小以及最小欧氏距离最大为原则，确定了在衰落信道下ofdm系统中采用准相干解调时，星型qam调制星座图优化的方法。 |
| 10. | Abstract : in this paper , an orthogonal multicode wideband cdma system modelincluding pilot channel based on chaos spreading sequences is given . based on chaos sequences , with pilot channel inserted orthogonally , it is shown that the performance of the system is improved . the performance of the system in fading channel is analyzed
文摘:提出一种基于混沌序列含导频信号的宽带正交多码cdma系统模型，利用混沌序列以及采用正交插入导频信号提高系统性能，并对此模型在衰落信道中的性能进行分析。 |
