论文标题
ISI频道的在线塑造数量有限的ADC位
Online Shaping for ISI Channels with a Limited Number of ADC Bits
论文作者
论文摘要
提出了一种在线构造技术，用于通过符号间干扰（ISI）（ISI）和接收器对数字转换器（ADC）噪声进行高性能通信的高性能通信。该技术使用在线发射器对脉冲振幅调制（PAM）星座的预编码，旨在塑造符号分布，从而满足通道输出处的峰值功率约束。迭代解码器共享修改后的M-BCJR模块之间的信息，该模块在线计算形状分布的格子过渡概率和涡轮解码器。结果是减少了所需的ADC有效数量（ENOB），这在现代的高速有线链路中特别有吸引力。理论上的界限是分析得出的，可以使用塑形评估可能的增益。在实际情况下，旨在通过印刷电路板传输200 Gbps和400 Gbps，与在接收器侧具有均匀的4-PAM传输相比，在模拟中，我们在仿真中分别进行了总体邻旋纤维增益高达1.43位和1.78位。
An online shaping technique for high performance communication over Gaussian channels with Inter-Symbol Interference (ISI) and receiver Analog to Digital Converter (ADC) noise is presented. The technique uses online transmitter precoding over Pulse Amplitude Modulation (PAM) constellation, designed to shape the symbols distribution so that peak power constraint at the channel output is satisfied. An iterative decoder shares information between a modified M-BCJR module, which computes online the trellis transition probabilities of the shaped distribution, and turbo decoder. The result is a reduction in the required ADC Effective Number Of Bits (ENOB), which is in particular attractive in modern high-speed wireline links. Theoretical bounds are analytically derived which enable to assess the possible gain using shaping. On practical scenarios aim to transmit 200 Gbps and 400 Gbps over printed circuit board, we demonstrate in simulations an overall ENOB gains as high as 1.43 bit and 1.78 bit, respectively, compared to uniform 4-PAM transmission with turbo equalization at the receiver side.
