**Acronyms**


*Perfect Signal Transmission Using Adaptive Modulation and Feedback DOI: http://dx.doi.org/10.5772/intechopen.90516*


8.The FT transmitters can be realized in analog, digital, and mixed technologies. The results of analysis show that the most preferable form of realization would be the software implementation of the FT. Optimal transmissionreception and adjusting algorithms contain all basic information for the development and implementation of the software (SDR) version of the FT. Moreover, this software can be used for the reconfiguration of transmitters

and the extension of possibilities of their utilization and functional

9.Preliminary research [42] showed that perfect AFCS can be also used,

virtually without modification of transmission scheme and algorithms, for the transmission of short codes. These codes can be parts of the longer code routed to the input of the AFCS or formed by digital sensors. The set of the codes can be converted into the uniform set of analog values, and high accuracy of AFCS transmission will ensure reliable resolution of the received

10.The designed prototype of AFCS is the first "living" example of the system that transmits signals without coding perfectly, and this was confirmed by

Most of the listed capabilities of AFCS are not feasible for the CS with coding. In this chapter, we considered only scalar (point-to-point) AFCS which employ the AM transmission, but the theory allows for the extension to optimization of the multi-channel FCS. Moreover, AM is only one of three types of modulation, and each has its own limited operating range. It would be important to investigate the systems with the FM and PM modulations—this could give a new classes of perfect FCS transmitting signals without abnormal errors and with the limit energy-spectral efficiency. It is also worth noting that statistical fitting condition (26) can be used for the optimization of different classes of estimation, controlling, measurement,

In conclusion, let us repeat the questions asked in [19]: "Is the PHY layer dead? … whether the research directions taken in the past have always been the right choice and how lessons learned could influence future policy decisions?"

The author expresses a deep gratitude to the young colleagues Ievgen Zaitsev, Borys Jeleński, and Jan Piekarski, as well as to the colleague Henryk Chaciñski for their active participation in the elaboration of the AFCS prototype and creative

possibilities of the EN as a whole.

*Modulation in Electronics and Telecommunications*

the results of experiments.

and signal processing systems.

**Acknowledgements**

engineering thinking.

CS communication system

WN wireless network

FT forward transmitter

EN end node

CSC communication system with coding FCS feedback communication system

AFCS adaptive feedback communication system

**Acronyms**

**22**

signals.
