Signal Integrity: The challenge here is that PCIe, using high-speed 8-Gbps serial links, can suffer from a multitude of physical phenomena such as crosstalk, impedance discontinuities resulting in reflections that cause jitter, Intersymbol Interference
(ISI), and mode conversion due to unbalanced transmission lines--all of which can lead to excessive electromagnetic interference (EMI) emissions in large systems.
56 null subcarriers are inserted for the guard interval, and the cyclic prefix of 32 subcarriers is provided to reduce intercarrier interference and intersymbol interference
, so there are a total of 288 subcarriers per symbol period.
1, the transmission scheme for each user ultilizes OFDM to combat intersymbol interference
, and IDD structure is emploed at the receiver.
An underwater communication system based on time domain channel equalization is presented in , which migrate the multipath induced intersymbol interference
through adaptive equalization of time domain samples.
After A/D sampling, intersymbol interference
is cancelled by the equalization.
Furthermore, we perform pulse shaping at the transmitter according to the Nyquist criterion to generate intersymbol interference
(ISI) free signals.
Putting L =1 and neglecting intersymbol interference
term in appendix B of , we have the following probability of equation:
So, different number of FFT carriers should be selected in a way to minimize the expected interference (caused, for example, by the Doppler effect or multiple reflections in free space) and intersymbol interference
. Fortunately, this technique supports the single frequency network type, thus eliminating the selfinterference.
The basic principle of duobinary coder is adding an intersymbol interference
(ISI) to the transmitted signal in a controlled manner and compensating its effect at the receiver.
Tachyon and Tachyon-100G materials use spread glass and reduced profile VLP-2 copper (very low profile copper with 2 um Rz surface roughness copper foil) to mitigate PCB induced differential skew, improve signal rise times, and reduce jitter and intersymbol interference