Assuming strong FEC (as currently proposed) requires raw BER of ~1e-6 at decoder input – which can be measured in time domain simulation. The “long and strong“ DFE required by PAM-2 can increase noise margin (eye height) with optimal sampling, but has little effect on timing margin (eye width), since the coefficients are fixed.

Bit error ratio (BER) as a function of the SNR for PAM-N signaling schemes achieving 100 Gb/s single channel. A study is presented through simulation and experiment on the...

Is 1Tb/s Ready for Prime Time? Engineering Reality Check. The effective SNR at DFE output is approximately the TX SNR decreased by 1⁄2 the IL (channel insertion loss) in dB at the Nyquist frequency. Use of T/2 FFE with higher number of taps will increase the horizontal eye opening.

However, I am interested in the actual SNR vs. BER, i.e. my signals have a certain level (e.g. 1, -1) and I add some noise described by $\sigma^2$. Many sources describe this relationship as (e.g. http://drum.lib.umd.edu/bitstream/handle/1903/3400/umi-umd-3213.pdf?sequence=1&isAllowed=y):

Over-clocked PAM8 with Coded Modulation (40G) improves SNR by 4.65dB. We have proposed new coding and mapping alternatives for PAM. We have a high degree of confidence in technical feasibility. Coded modulation trades up to 500 ns of latency to provide a robust optical link.

Abstract: A 1-10 Gbps receiver analog front end in 0.13 /spl mu/m CMOS enables a SERDES cell for backplane serial communications using differential PAM2, PAM4, or PAM2 partial response signaling with adaptive equalization. Dynamic sampler swapping and various built-in diagnostic capabilities enable receiver calibration and self-characterization ...

2024年6月17日 · NRZ：是“ Non-Return-to-Zero ”的缩写，字面意思叫“不归零”，也就是不归零编码。非归零码用高低两种电平{1,0}传递信息，也称为 PAM2 码。其中“1”通常用高电压表示，而 “0”通常用低电平表示。 NRZ 码每一个符号周期可以传输一位信息，0 或者 1。

We present an integrated equalizer used for electronic dispersion compensation in the 1mm SI-POF home-networking scenario applying 650nm RCLED and SI-PIN-PD. Real-time experimental results demonstrate that the approach gives better BER performance then to date published with competing architectures.

• There have been some suggestions that PAM2 may be a better option in 2.5 Gbps mode of 802.3dm • A comparison of PAM2 and PAM4 is needed

2021年5月31日 · 在实际应用中，评估调制系统的性能通常包括计算误码率（ber）和观察其与信噪比的关系。 MATLAB提供了许多内置函数，如` ber awgn`，可以帮助进行这种分析。