multitone 中文意思是什麼
multitone
解釋
多頻聲-
Implementation of fm with multitone modulation using ad
7008實現多音頻調制的調頻信號 -
An optimal design method for the prototype filter design of the filtered multitone modulation system is proposed
摘要給出了濾波多音調制系統的原型濾波器優化設計方法。 -
An investigation of the bit allocation technology for multitone systems
多音傳輸系統中的比特分配技術研究 -
In this paper, bit - error rate performance analyses are presented for coded and un - coded frequency hopping m - ary frequency - shift keyed systems under the condition of additive white gaussian noise ( awgn ) and partial band noise jamming and multitone jamming. the use of error - correct codes provide a way to improve the performance of frequency hopping system, particularly the use of reed - solomon code in a fh system under the condition of partial band noise jamming can greatly improve the performance of system. so we provide the way of coding and decoding of rs code in c language. in the end, we offer the simulation of the performance of time diversity fh / 2fsk system over partial band jamming noise channels
第一章為緒論，敘述跳頻通信的發展趨勢，以及基本概念，第二章及第三章介紹提高抗部分頻帶干擾的前向糾錯碼reed - solomon碼的原理和實現方法。第四章研究跳頻通信系統在各種干擾條件下的性能。最後在第五章以fh mfsk系統為例，探討在部分頻帶干擾下的系統性能，並進行計算機模擬，模擬結果表明採用分集技術和各種編碼技術對于系統的性能改善具有明顯的效果。 -
The new banknotes also retain security features used in current series of banknotes, including concealed image denomination, intaglio printing, invisible fluorescent fibres, multitone and highlight watermarks, security thread, see - through feature and serial numbers
新鈔亦保留了現有鈔票上的防偽特徵，包括隱藏式圖案銀碼凹版印刷螢光纖維水印金屬保安線透視圖案及鈔票序號。 -
The new banknotes also retain security features used in the old series of banknotes, including concealed image denomination, intaglio printing, invisible fluorescent fibres, multitone and highlight watermarks, security thread, see - through feature and serial numbers
新鈔亦保留了舊版鈔票上的防偽特徵，包括隱藏式圖案銀碼凹版印刷螢光纖維水印金屬保安線透視圖案及鈔票序號。 -
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。 -
Simulation results demonstrate theoretical derivation is correct and both sequences can be used in communication. based on the presented ds / sfh communication scheme, and employing msk as fh spread spectrum modulation, the performance is studied n the presence of partial band multitone jamming and additive white gaussian noise ( awgn )
根據所提出的混合ds sfh擴頻通信系統方案，採用msk相干調制，在假設直接序列擴頻后信號帶寬等於跳頻間隔的情況下，推導了系統在部分頻帶多頻干擾和加性白噪聲下的誤比特率公式。 -
Dmt discrete multitone
離散的多頻聲
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