多載波直接序列擴(kuò)頻碼分多址系統(tǒng)的性能分析
PERFORMANCE ANALYSIS OF MULTICARRIER DS CDMA SYSTEMS
-
摘要: 本文將多載波發(fā)送信號技術(shù)應(yīng)用于直接序列擴(kuò)頻碼分多址系統(tǒng)中。發(fā)射機(jī)中直接擴(kuò)頻序列與數(shù)據(jù)序列相乘,然后調(diào)制多個載波;接收機(jī)對每個載波進(jìn)行相關(guān),相關(guān)器的輸出用最大比值合并。這種發(fā)送信號具有很好的窄帶干擾壓縮性能。文中估計了存在部份帶寬干擾下系統(tǒng)的性能,并與單載波直擴(kuò)碼分多址系統(tǒng)進(jìn)行了比較。
-
關(guān)鍵詞:
- 碼分多址; 直擴(kuò); 多載波; 干擾
Abstract: In this paper，A multicarrier signaling technique is applied to a direct-sequence CDMA system．A data sequence multiplied by a spreading sequence modulates multipte. Carriers in transmitter，the receiver provides a correlator for each carrier, and the ouputs of the correlators are combined with a maximal-ratio combiner．This type of signaling has the desirable properties of a narrow band interference suppression effect．The system performance is evaluated in the presence of partial band interference，it is compared with that of a single-carrier DS CDMA system. -
Turin G L., Introduction to spread-spectrum antimultipath techniques and their application to urban digital radio, Proc[J].IEEE.1980,68(3):328-353[2]胡愛群等．一種新的數(shù)字蜂窩移動通信系統(tǒng).通信學(xué)報，1995，16(1)：116-120．[3]Chouly A et al. Orthogonal multicarrier technique applied to direct sequence spread spectrum CDMA Systems．In：proc．GLOBECOM93：Boston：1993, 1723-1728．[4]Cao Yewen, Xiang Haige. A frequency-diversity spread spectrum multipleraccess system with random signature sequence．通信學(xué)報(Joural of China lnstitute of Communications), 1995, 16(4)：56-62[5]Kondo S, Milstein B．Multicarrier DS CDMA systems in the presence of partial band interference． In：proc MILCOM94，New Jersey：1994，588-592．[6]Kondo S，Milstein B.Performance of multicarrier DS CDMA Systems[J].IEEE Trans.on Commun.1996,44(2):238-246[7]郭梯云，等．移動通信．西安：西安電子科技大學(xué)出版社，1995，第三章．[8]沈元春．?dāng)U譜技術(shù)．北京:國防工業(yè)出版社，1995，第六章．[9]朱近康．?dāng)U展頻譜通信及其應(yīng)用.合肥：中國科學(xué)技術(shù)大學(xué)出版社，1993，第二章. -
計量
- 文章訪問數(shù): 2593
- HTML全文瀏覽量: 106
- PDF下載量: 511
- 被引次數(shù): 0
下載:
