| 1. | Work style : fhss or single frequency
射频功率： 2032dbm可调 |
| 2. | Frequency hopping spread spectrum fhss
跳频扩频 |
| 3. | Frequence 902928mhz adjustable with the difference of the country work way fhss or fix frequence
工作频率： 902928mhz随国家或地区不同可以调整 |
| 4. | The drawback is that fhss is relatively slow , and in congested cities with a lot of radio traffic , range can be reduced
其缺点是较慢，在有大量无线电流量的拥挤城市中，传输距离有限。 |
| 5. | Fhss and dsss is the general spread spectrum method in 802 . 11b standard , and have the stronger confidentiality and anti - interference
跳频扩频( fhss )与直接序列扩频( dsss )是802 . 11b标准常用的两种扩频方式,具有较强的保密性与抗干扰性。 |
| 6. | Fhss has just welcomed her new principal early 2005 . with a smooth transition , this drum troupe shall continue to produce wows … and oohs … with her own innovations
辅华中学2005年才刚迎接了新一任的校长，经过顺利地接棒，他们将会继续为大家服务。 |
| 7. | Every few milliseconds , a fhss signal bounces between different specific points in a designated " spread " of the electromagnetic spectrum , reducing interference from other signals and making it very difficult to eavesdrop on the transmission
每隔几毫秒， fhss信号在指定“扩展”的电磁频谱的不同频率点上跳动，减少其它信号的干扰，使它在传输中难以被窃听到。 |
| 8. | In this chapter , we began with the mac - layer and then briefly explained the three types of ieee 802 . 11 physical ( phy ) layers ( frequency hopping spread spectrum ( fhss ) physical layer , direct sequence spread spectrum ( dsss ) physical layer and infrared ( or photonic ) physical layer )
本章从mac层开始，简要解释了三种类型的ieee802 11物理层：跳频扩谱( fhss )物理层、直接序列扩谱( dsss )物理层、红外(或光子)物理层。 |
| 9. | 4 . analyzed two types of spread spectrum ( dsss and fhss ) approved by the fcc based on the characteristic of phy layer ; then analyzed the characteristic and technology of the cck modulation and at last put forward an improved cck scheme that will increase the data rate of wlan to 16 . 5mbps
针对物理层的特点，讨论了无线局域网的两种扩频技术? ? dsss和fhss ，分析比较了两者的性能特点和适用的范围，并探讨了一种支持高数据数率的cck调制方式以及使速率能达到16 . 5mbps的cck改进方案； 5 |
| 10. | In chapter three , the theory of particular anti - jamming technologies are analyzed , especially the spread spectrum ( ss ) is one of the most important anti - jamming technologies , including direct sequence spread spectrum ( dsss ) , frequency hopping spread spectrum ( fhss ) and other improved technologies
第三章研究了时域、频域、功率域多种抗干扰技术的抗干扰机理和定量描述抗干扰能力的方法,其中扩展频谱技术是主流的抗干扰技术,包括直接序列扩频和跳频技术以及它们的改进方案。 |
