Constraint gain
Constraint gain
复制标题
约束增益
DOI：
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发表时间：
2004
影响因子：
2.5
通讯作者：
B. Marcus
中科院分区：
文献类型：
--
作者：
John L. Fan;T. Poo;B. Marcus
在噪声信道的输入需要满足调制约束的数字存储系统中，约束码和错误控制码（ECC）通常被独立地设计和解码。这种情况下的可实现速率被评估为约束和ECC的平均交集的速率。与噪声约束信道的容量的差距被称为约束增益，其表示在组合约束码和ECC的设计和解码中的潜在改进。约束增益计算的各种约束的二进制输入加性白色高斯噪声（AWGN）信道（BIAWGNC），以及在符号间干扰（ISI）的渠道。最后，它表明，一个无限级联的反向级联的约束和ECC的独立解码具有等于平均相交率的容量。
In digital storage systems where the input to the noisy channel is required to satisfy a modulation constraint, the constrained code and error-control code (ECC) are typically designed and decoded independently. The achievable rate for this situation is evaluated as the rate of average intersection of the constraint and the ECC. The gap from the capacity of the noisy constrained channel is called the constraint gain, which represents the potential improvement in combining the design and decoding of the constrained code and the ECC. The constraint gain is computed for various constraints over the binary-input additive white Gaussian noise (AWGN) channel (BIAWGNC) as well as over intersymbol interference (ISI) channels. Finally, it is shown that an infinite cascade of reverse concatenation with independent decoding of constraint and ECC has a capacity equal to the rate of average intersection.