基于(n,,a,c)OOC的紅外OPPM-CDMA系統(tǒng)分析
Performance of Infrared OPPM-CDMA Systems Using Optical Orthogonal Codes (n,,a,c)
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摘要: 考慮系統(tǒng)存在多用戶干擾、背景光干擾、接收機散粒噪聲、暗電流和熱噪聲的情況下，使用概率的并集界以及有兩個判決量度相等也發(fā)生判決錯誤的悲觀估計法，推導任意a,c下紅外OPPMCDMA 系統(tǒng)的相關(guān)接收機、單光硬限幅器相關(guān)接收機和雙光硬限幅器相關(guān)接收機的誤比特率上限。最后通過計算機仿真對該3種接收機的誤碼特性進行分析和比較。
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關(guān)鍵詞:
- 光正交碼（OOC）; OPPM-CDMA; 自干擾; 多用戶干擾（MUI）; 光硬限幅器
Abstract: The effect of the multiple-user interference, the receiver shot noise, ambient light interference, the receiver dark current and the thermal noise are taken into account. A probability union bound and the pessimistic estimation method are used that decision errors may occur on condition that two decision measurements are equal. The upper bounds of the bit error (BER) of infrared Overlapping Pulse-Position Modulation (OPPM)/Code Division Multiple Access (CDMA) correlation receiver without optical hard-limiters, with single optical hard-limiters and with double optical hard-limiters for arbitrary AQ and Ac are derived. Moreover, the performance analysis and comparisons for aforementioned three receivers are presented by computer simulation. -
Shalaby H M H. Optical OPPM-CDMA receivers with chip-level detectors[J].IEE Proc. Commun.2001, 148(1):31-37[2]Shalaby H M H. A performance analysis of optical overlapping PPM-CDMA communication systems[J].Journal of Lightwave Tech.1999, 17(3):426-433[3]Shalaby H M H. Direct detection optical overlapping PPM-CDMA communication systems with double optical hard limiter[J].Journal of Lightwave Tech.1999, 17(7):1158-1164[4]Shalaby H M H. Effect of thermal noise and APD noise on the performance of OPPM-CDMA receivers[J].Journal of Lightwave Tech.2000, 18(7):905-914[5]Chen J J, Yang C C. CDMA fiber-optical systems with optical hard limiters[J].Journal of Lightwave Tech.2001, 19(7):950-958[6]Shalaby H M H. Maximum achievable number of users in optical PPM-CDMA local area networks[J].Journal of Lightwave Tech.2000, 18(9):1187-1195 -
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