Synthesis PSK wavelet-signal

On improving immunity has always been given priority in the development of radio communication. Among the well-known modulation formats is the most error-correcting binary phase shift keying is used extensively to radio HF VHF hands. Advances in the multiresolution analysis suggest that the synthesis signal on the basis of wavelets allow to obtain modulation formats with high noise immunity properties. It can be argued that the wavelet signals provide additional structural secrecy in relation to systems analysis using other functional bases of processing radio signals.

In this regard, the article discusses the synthesis of phase-shift keyed signals based on wavelet and study their immunity in an additive white Gaussian noise.

The very' same synthesis procedure is as follows. Forming a carrier wave of a certain frequency, which in accordance with a predetermined manipulation speed is changed according to the value of the phase information sequence of logical ones and zeros. As the chip is proposed to use fragments offirst-order Gaussian wavelet that represents the first derivative of the Gaussian function.

Localization properties of the wavelet in time and bilateral temporal structure allow it to form the basis of fluctuations, which can also he regarded as a phase-shift keyed signals.

To estimate the noise immunity of the proposed PSK-2 wavelet design was defined channel with A WGN. As the initial capacity of the fragment was determined based on the sine wave signal generated by the quadrature. Amplitude sine wave was timebase f2. To provide similar facilities for fragment-based wavelet, its amplitude was increased to a level of 2,S4. High immunity to ensuring wavelet signals only when the receiving end of the correlation processing is performed in the wavelet base functions.

Synthesis of signals based on the fragments of wavelets allows to obtain the modulated vibration immunity which exceeds 2 dB potentially possible indicators for PSK-2 signals. If considered as modulating fragments offirst-order Gaussian wavelets, the win in order to provide additional structural secrecy of the order of I dB.

Further studies are seen in the development of effective methods of wavelet signal demodulation.