PAM-n-Signal Shaping Utilizing Resolution Time

At present, capacity increasing of data transmission systems through adaptive control of their operation modes or the use of adaptive methods for receiving and processing signals in complex frequency selective channels is becoming increasingly important. In this paper the issues with the possibility of controlling the operating modes of the data transmission system to increase its efficiency by choosing of the impulse shape of binary amplitude-pulse signal is considered. The solution of this problem is carried out by using the previously developed method of the theory of resolution time. It is shown the possibility of data transmission rate increasing by 34 percent while reducing the noise immunity by no more than 1.8 - 2 dB for a channel whose frequency response corresponds to the channel used in the Ethernet standard. In case of poor matching of the equipment with the communication channel, it is shown that it is possible both to increase data transmission rate and to increase the noise immunity of the system as a whole due to the correct choice of the impulse shape.