The BER is main index in transmitting digital signal in upstream channel. To ensure BER value, the CNR value must be maintained. Gives the distributing features of noise source in upstream channel and introduces its computing method of C/N .
Introduced the designing aim,step and method of two-way HFC network upstream channel,elaborated the design and debugging idea of patterning two-way HFC network upstream channel,So that returning channel works in high point.
It expounds new idea of transmission and debugging about HFC bilateral network upstream channel, to make the upstream channel work at the best state in a simple the effective way, so that the devices of the upstream channel can run stably and reliably.
This text discussed the setting and adjustment in CATV broadband information of HFC network and the key point of return path channel, as well as the question of mixture connection of return path signal in the front or CMTS in the front.
This article proceeds from the angle of promoting the development of digital television, proposes and analyzes the transform ofl HFC network, constructs HFC feedback channel, the significance and the method that realized the function by inter-wired digital television in the bi-HFC network. The key has carried on the detailed category and solution to the noise of feedback channel as well as structure and the composition of the bi-HFC network.
Both the simulation and experimental results disclose that the hydrodynamic vibration, with the same intensity, frequency and 180° phase shift, occurs at axisymmetric points in the feedback channel of the fluidic flowmeter.
In particular, our SOM approach avoids the time-consuming index assignment process in traditional RVQs and does not require a reliable feedback channel for COVQ-like training.
Since a feedback channel is bandwidth-limited, we present a method of quantizing transmit-weight vectors.
Among them, Ca2+-mediated feedback channel modulations are often mediated by calmodulin (CaM) and other Ca2+-binding proteins.
In this article we study a channel with arbitrarily varying channel probability functions in the presence of a noiseless feedback channel (a.v.ch.f.).