METHOD OF OPTIMIZATION OF THE RADIO TELEPHONY
V. G. Sannikov
Moscow Technical
University of Communications and Informatics
The paper is received on November 14, 2014
Abstract. In digital system of a
radio telephony with magnifying of bit rate a principal cause of decrease of
its noise immunity is the intersymbol interference. Methods of optimisation of
reception are applied to boosting of noise immunity of system in modern modems,
enough complex in implementation on the basis of the reception as a whole in
the core. In paper the new method of synthesis of optimum finite signals in the
transmitting modem, in essence not calling an intersymbol interference on a
communication channel output, and leading to simple optimum element reception
is offered. The theorem of existence of optimum signals, finite both on an
entry, and on an output of a linear communication channel is proved. Formulas
of calculation of a noise stability of radio-telephone system are given exact,
in comparison with known parities, at a data transmission with the quadrature
amplitude modulation on communication channels with an intersymbol
interference.
Keywords: radio telephony system, a
data transmission, intersymbol interference, optimum finite signals, the modem,
a noise immunity.