QPSK基帶數(shù)字相干解調(diào)的載波提取
CARRIER EXTRACTION OF QPSK BASEBAND DIGITAL DEMODULATION
-
摘要: 本文介紹了基帶數(shù)字相干解調(diào)的載波恢復(fù)鎖相環(huán)的結(jié)構(gòu)原理,并對(duì)其進(jìn)行了性能分析。與四倍頻方法比較,在相同條件下,前者比后者環(huán)路信噪比高5--10dB。實(shí)驗(yàn)結(jié)果表明,恢復(fù)的載波穩(wěn)定性良好。
-
關(guān)鍵詞:
- 數(shù)字通信; 相干解調(diào); 鎖相環(huán)
Abstract: The principle and structure of the carrier recovery PLL of baseband digl-tal coherent demodulation are presented, and the performance of this PLL is analysed. Comparing with the four times frequency method under the same conditions, the signal to noise ratio of this PLL is 5-10dB higher. The experimenta! results show that the recovered carrier is stable. -
H. B. Killen, Digital Communication with Fiber Optics and Satellite Applications, Prentice-Hall, Inc. Englewood Cliffs, New Jersey,(1988),pp. 153-162.[2]V. K. Bhargava.[J].et al., Digital Communiction by Satellite (Modulation, Multiple Access and Coding) A wiley-interscience publication, John wiley Sons, New York.1981,:-., Digital Communiction by Satellite (Modulation, Multiple Access and Coding) A wiley-interscience publication, John wiley' target='_blank'>[3]鄭繼禹等著,鎖相環(huán)路原理與應(yīng)用,人民郵電出版社,北京,1976年,第142-185頁(yè).[4]J.J. Spilker, Jr.著, 白延隆譯, 衛(wèi)星數(shù)字通信,人民郵電出版社,北京,1980年,第426-433頁(yè). -
計(jì)量
- 文章訪(fǎng)問(wèn)數(shù): 3307
- HTML全文瀏覽量: 206
- PDF下載量: 784
- 被引次數(shù): 0
下載:
