Crosstalk Suppression by Applying Multilevel Transmission

Abstract

Crosstalk is one of the bottlenecks in improving the speed and density of high-speed interconnection systems. In this paper, multi-way and 2-level transmission is changed to one-way and multi-level transmission. Under the condition to maintain the data transmission capacity of the system, the number of microstrip lines is reduced, and the distance between microstrip lines is increased to reduce crosstalk. The simulation results show that over 50% of crosstalk is suppressed in multilevel signal transmission systems.

Anti-Crosstalk Noise Performance Analysis of Multi-Symbol Transmission and Joint Crosstalk Reduction Method

“…Therefore, crosstalk reduction is limited. With this principle, applying multi-symbol transmission can reduce the number of transmission lines and minimize crosstalk without expanding the circuit board area [8]. This transmission is equivalent to increasing the distance between transmission lines.…”

“…When signals of four-channels 2PAM are changed into those of two-channels 4PAM, crosstalk will also decrease due to the expansion of the transmission line spacing. According to [8] and the definition of the parameters in Table 2, the relationship between v c4 and v c2 under the same SNR is According to the above mentioned conditions, the SER of v c2 = A/4, v c2 = A/3, v c2 = A/2 under the same SNR is simulated with MATLAB, as shown in Figures 3 ∼ 5. After signals of four-channels 2PAM are changed to those of two-channels 4PAM and with the decrease in crosstalk, the latter has an advantage in anti-crosstalk compared with the former in terms of the influence of crosstalk on SER.…”

“…Although this method can effectively restrain crosstalk, its application is hampered by drawbacks, such as cost, process, and implementation complexity. In [8] and [9], several methods based on copper interconnection, such as multilevel transmission and linear combination transformation, are proposed to reduce crosstalk. Given that weak coupling is the precondition to reduce crosstalk by signal linear combination transformation, the application can only be used under the 3W rule (3W rule: The distance from one center point to the other of the adjacent transmission lines is three times of the line width).…”