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The present work deals with the use of biphasic codes for their application as an exciting signal in pulse compression radars. Its main characteristics are exposed and the digital design of sections for modulation, reception and compression is described. Very High-Speed Integrated Circuit Hardware Description Language (VHDL) was used for its implementation and MATLAB® for simulation, modelling and synthesis in VHDL of functional blocks. A 32-bits code is used with witch a 20.56 dB Peak to Sidelobe Level Ratio (PSR) is guaranteed. The contribution of the proposal lies in the demonstration of two convolution synthesis methods for the BPSK signal. Is presented and described its finite difference equation that define both of the convolution methods and also presented main resources used for their synthesis on DE10-Standard Development Kit. [ABSTRACT FROM AUTHOR]

The tracking of radiofrequency signals emission source that use directive antennas constitutes a trend in the modern telecommunication systems. The present investigation is based in the application of digital signal processing techniques in FPGA to estimate the angular position of the signal emission source using monopulse. The paper shows design and implementation of processing blocks to determinate source direction from sum and difference resulting channels of the antenna. The system is done by multidomain simulation platform Simulink and exported to hardware description language for implementation in FPGA (Field Programmable Gate Array). In the obtaining of error curve are used polynomial approximation models. The developed system is verified through eight elements antennas array with digital beamforming. [ABSTRACT FROM AUTHOR]

This paper shows the obtaining process of a digital beamformer of multiple simultaneous directional patterns for signals reception using the ARRadio evaluation board. The board is based on the integrated transceiver AD9361 and guarantees the reception, digitization and seending to an FPGA (Field Programmable Gate Array) of the received radio waves by each radiofrequency channel. The FPGA is located on the TR4 Development Board. Communication between FPGA and ARRadio is realized through a high speed connector. On the programmable device are performed AD9361's configuration and control, multichannel calibration process based on Fourier Transform (as method of measuring the delay between channels) and beamforming of multiple simultaneous directional patterns digitally. Simulink is used as design tool for digital system develop. Finally is realized the implementation and experimental verification of multiple digital beamforming system. [ABSTRACT FROM AUTHOR]