spread bandwidth 中文意思是什麼
spread bandwidth
解釋
擴展帶寬-
The mobile multimedia communication system need to support the transmission of high - speed data and variable speed data compared with the ordinary spread spectrum communication. the data rate ranges from several kbps to hundred kbps for wide up to 2mbps. in order to assure different data rate to transmission in the same spread spectrum bandwidth, we need to use different lengths and orthogonal pn codes
傳統移動通信系統所提供的數據速率一般只有幾kbps ，而移動多媒體通信所要求的數據速率范圍為幾mbps甚至幾十mbps ，在同一擴頻系統內傳輸多媒體的擴頻比也不一樣，就要採用不同長度的偽碼，而且偽碼之間必須保證正交性或準正交性。 -
Supposing chaotic ds - spread spectrum signal bandwidth is equal to the fh slot spacing, the bit error rate formula is derived, and its performance is evaluated and simulated assuming the worst case of jamming strategy. the results show that, in some cases, the addition of chaotic ds spreading to fh system, without increasing total system bandwidth, can improve significantly the system ' s resistance to partial band multitone jamming
對最惡劣條件下系統的抗干擾性能進行了模擬研究，結果表明，在某些情況下，在慢跳頻系統中，加入混飩直擴成分，即使不增加系統帶寬也能有效地改善系統對抗部分頻帶多頻干擾的能力。 -
The theoretical results are evaluated by simulation. if the coherent bandwidth of channel doesn ’ t exceed the occupied bandwidth of two chips, with the increase of delay spread of the channel, mc - ss - cldd exhibits a better performance to make the system resistant to frequency - selective fading
研究結果表明，多載波擴頻碼片級差分檢測在單用戶和多用戶情況下，均適合於時變頻率選擇性衰落通道，並具有抵抗頻率選擇性衰落的能力。 -
As one of the crucial metrics to picture the network characteristics, bandwidth has wide - spread applications in numerous areas such as overlay network, desigh and management in wireless network, traffic engineering, network security and so on
帶寬是描述網路狀態的重要參數，其在overlay網路、無線網路、流量工程與網路安全等方面都有廣泛應用。
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