S-parameter based multimode signaling

As the demands for higher density of interconnects and denser packages are increasing, crosstalk is becoming more important in input/output (I/O) design. Multimode signaling has been investigated for crosstalk cancellation. This paper presents a new scattering parameter (S-parameter) based methodology for multimode signaling. The set of coder/decoder coefficients (CODEC) is obtained from the S-parameters of the whole channel, which makes the scheme more applicable for practical systems. The derived CODEC shows a 20 dB improvement in signal-to-noise ratio and 45% reduction of root mean square (RMS) jitter compared with single-ended signaling for a practical benchmark problem.