擴頻電源總線火災探測與聯(lián)動控制系統(tǒng)
WIRE BUS USING SPREAD SPECTRUM SYSTEM FOR FIRE DETECTION AND EXTINCTION
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摘要: 本文提出一種基于電源線作為信號傳輸總線的火災探測與聯(lián)動控制系統(tǒng).該系統(tǒng)把擴頻通信技術應用于火災探測與聯(lián)動控制系統(tǒng),利用擴頻技術的低密度功率譜、強抗干擾性等特點,減小了一般僅用FSK或ASK方式調制的利用電源線系統(tǒng)作為通信信道系統(tǒng)誤碼率高的缺點,本文對擴頻通信的誤碼率做了分析.Abstract: This paper is devoted to the system for fire detection and extinction which uses power line as bus. And the spread spectrum technology is introduced to the system for fire detection and extinction. According to the low power density and high interference suppression characteristic of the spread spectrum communication system, it can decrease the high error code rate of the system which only uses FSK or ASK modulation method. The characteristic of error code probability in this system is analyzed.
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朱近康.擴展頻譜通信及其應用.合肥:中國科學技術大學出版社,1993, 21-27.[2]Funk M H, Arthur A G. Digital whitening techniques for improving spread spectrum communication performance in the presence of narrowband jamming and interference. IEEE Trans. on COM, 1978, COM-26(2): 209-216.[3]Loh-Ming Li, Milstein L B. Rejection of pulsed CW interference in PN spread-spectrum system using complex adaptive filters. IEEE Trans. on COM, 1983, COM-31(1): 10-20.[4]Ketchum J Proakis J K. Adaptive algorithms for estimating and supressing narrowband interference in PN spread-spectrum system. IEEE Trans. on COM, 1982, COM-30(5): 913-924.[5]Rusch L A, Poor H V, Narrowband interference supression in CDMA spread spectrum communications. IEEE Tans. on COM, 1994, COM-38(7): 1969-1979.[6]北京中安集團.ZA6000地址編碼兩總線模擬量火災探測報苦與消防聯(lián)動控制系統(tǒng)工程設計資料,北京:1996. -
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