Simulation and interactive approach based demonstration of pulse compression technique in atmospheric radar

Pulse compression technique plays a vital role in many communication systems e.g. optical, radio frequency (RF)/microwave, and biomedical applications. This article deals with demonstration of the technique in the atmospheric radar employed for wind profiling under various weather conditions. Relevant computation, simulations and analysis involved in practical application or implementation of this technique, that are achieved using the widely accepted complementary codes are presented. Moreover, making use of the computational and visualization features of MATLAB and LabVIEW packages, a flexible front-end graphic-user-interface (GUI) is designed and developed to demonstrate the functionality of this technique in the atmospheric radar operating at 206.5 MHz in the central Himalayan region. The GUI introduces the features of displaying coded or uncoded transmission and reception based on various user defined parameters such as pulse width (PW), pulse repetition frequency (PRF), Doppler frequency, and the number of data points. An interlock arrangement for inter-pulse period (IPP)—duty ratio is added to restrict the radar pulsed operation with the maximum duty ratio up to 15%. An arrangement is also made to visualize the auto and cross-correlations performed on the code sequences and RF signals. The user-friendly and easily customized GUI will benefit the larger user community in saving their time in writing their programs and/or constructing any hardware assemblies to test the performance of pulse compression technique during early design phases.

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