基于(n,,a,c)OOC的红外OPPM-CDMA系统分析
Performance of Infrared OPPM-CDMA Systems Using Optical Orthogonal Codes (n,,a,c)
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摘要: 考虑系统存在多用户干扰、背景光干扰、接收机散粒噪声、暗电流和热噪声的情况下，使用概率的并集界以及有两个判决量度相等也发生判决错误的悲观估计法，推导任意a,c下红外OPPMCDMA 系统的相关接收机、单光硬限幅器相关接收机和双光硬限幅器相关接收机的误比特率上限。最后通过计算机仿真对该3种接收机的误码特性进行分析和比较。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.
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