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15 de abr. de 2015 · This textbook, now in its 5th edition, provides updated state-of-the-art coverage of spread-spectrum communication systems with new applications throughout the book. In this edition, the author extends sections with more comprehensive details about many topics. Some of the more complex sections have been rewritten to make them easier to understand.
Summary. A spread-spectrum signal can be created by multiplying the existing baseband signal by a spreading sequence, also known as a PN code. The original signal is recovered by multiplying the spread-spectrum signal by the same PN code. A spread-spectrum signal has lower peak power, equal total power, and wider bandwidth.
扩频. 展頻 （Spread Spectrum，SS）是將傳輸訊號的 頻譜 （spectrum）打散到較其原始頻寬更寬的一種通訊技術，常用於無線通訊領域。. [1] 比較嚴格的定義則分成兩個部分：. 傳輸端會採用一個獨特的碼（code），此碼與傳送資料是無關的，接收端也必須使用這個獨特 ...
展頻（Spread Spectrum，SS）是將傳輸訊號的頻譜（spectrum）打散到較其原始頻寬更寬的一種通訊技術，常用於無線通訊領域。 比較嚴格的定義則分成兩個部分： 展頻調變之後，其訊號傳輸頻寬應遠大於原始訊號； 傳輸端會採用一個獨特的碼（code），此碼與傳送資料是無關的，接收端也必須使用這個 ...
Spread Spectrum. A spread-spectrum system is one in which the transmitted signal is spread over a wide frequency band, much wider than the bandwidth required to transmit the message. Such a system would take a baseband voice signal with a bandwidth of a few kilohertz and spread it to a band of many megahertz.
Spread spectrum is a technique used for wireless communications in telecommunication and radio communication. In this technique, the frequency of the transmitted signal, i.e., an electrical signal, electromagnetic signal, or acoustic signal, is deliberately varied and generates a much greater bandwidth than the signal would have if its ...
text, and spread spectrum systems were originally developed specifically for mili-tary applications. (For an interesting review of the history of the spread spectrum in the West in general and the US in particular, we can recommend the papers [1, 2, 3] or chapter 2 of [4].) However, in later years, spread spectrum systems have
