Adaptive to Interference Software-Defined Transmitter and Receiver of Radio Signals Based on Multi-Criteria Synthesis of Signal Set

Structural schemes of software-defined transmitter and receiver of relatively wide class of known and synthesized multi-position radio signals (both with direct sequence spread spectrum and without it) and signal-code constructions (based on trellis-coded modulation and FQPSK-like), which provide effective adaptation to the interference action under various environmental conditions, are developed. The synthesized signals and signal-code constructions can take into account the most important quality indicators for software-defined radio systems, namely interference attenuation, out-of-band radiation, noise immunity and energy efficiency of a generated radio signal, as well as minimizing the confusion of information symbol with errors in clock synchronization system. Generalized procedure for multi-criteria synthesis of radio signals and signal-code constructions for adapting software-defined radio systems to interference is proposed. The choice of specific procedure depending on preset settings as well as environmental parameters is made.