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題 名 | A Tutorial for the Performance Analysis on Frequency Hopping Systems=跳頻系統之效能分析 |
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作 者 | 江高飛; 陳瑞華; | 書刊名 | 華梵學報 |
卷 期 | 1:1 1993.02[民82.02] |
頁 次 | 頁107-120 |
分類號 | 448.82 |
關鍵詞 | 頻率跳變; 跳頻; 反堵塞; 展頻; 直接連續頻率; 截波率; 頻寬; 同步; 效能分析; 跳頻連續損耗; 雜訊堵塞; 頻率偏移鍵; Frequency hopping; Hopping; Antijmming; Spread spectrum; Direct sequence; Chip rate; Bandwidth; Synchronization; Performance analysis; Hop combining losses; Noise jammer; Frequency shift key; FSK; |
語 文 | 英文(English) |
中文摘要 | 跳頻(frequency hopping)在現今無線電通訊發展上已成為非常通用的方法.尤其 是用在反堵塞(Antijamming)保護技術方面.它提供二種頻率展譜(spread spectrum)方法 如下:一為續頻(Direct sequence),另一為跳頻(frequency hopping).就續頻言,它將需要 較高的載波率(chip rate)才能達到所需較寬的波寬(bandwidth),由於頻率同步的困難,因 此,續頻方法並非理想.另言之,所提跳頻,它並不需要較高的截波率,也不要求跳頻對跳 頻間的一致性.故在設計高增益反堵塞通訊系統中,跳頻已提供非常靈活的方法. 以下為本論文的幾項特性: (1)產生頻率堵塞是因寬頻或部分頻段之雜訊(noise)加入而引起,在論文篇尾對跳頻連接 損耗(hop combining loss)與FH/M-FSK及DPSK系統,在有無編碼(coding)情況下的通盤 分析. (2)跳頻通訊的實際應用,諸如多樣化選擇,截波和連接損耗等.對電子工程系學生是非常感 興趣的講授課題. |
英文摘要 | Frequency hopping is becoming the most popular design approach in recent developments on radio communication, especially on AJ (antijamming) protection techniques. The two spread spectrum techniques used to provide AJ protection are direct sequence and frequency hoppimg. Since the direct system will require a very high chip rate in order to achieve the desired wide spread bandwidth. This will make direct sequence system less desirable because of synchronization difficulties. The proposed frequency hopping, on the other hand, does not need an extremely high chip rate and does not require hop coherence. As a consequence, frequency hopping has become the most variable approach in the design of high gain AJ system. The proposes paper has the following characteristics: (1)A number of system performance analysis are presented. The jamming scenarios under consideration here are wide band or partial band noise jamming. In the end of the paper gives a general analysis on hop combining losses and FH/M-FSK and DPSK systems with and without coding under the above environments. (2)The applications of practical frequency hopping communications such as diversity selection, clipping and combining loss, etc. will be very interested tutorial topics for EE students. |
本系統中英文摘要資訊取自各篇刊載內容。