CAD based implementation of RADAR using Direct Sequence Spread Spectrum technique

Abstract: DIRECT SEQUENCE SPREAD SPECTRUM (DSSS) is a spread spectrum technique and commonly used for military purposes. This paper consists of CAD based designing of RADIO WAVE DETECTION AND RANGING ( RADAR)transmitter and receiver using DSSS techniques with better accuracy and ranging. The reason to use DSSS signal for spreading because it has its own inherent merits like accuracy of ranging, sensitivity of power estimation and interference suppression than other types of spread spectrum. The goal is to detect target at very short distance by sending and receiving RF signals with high resolution and calculate range of target with high accuracy and also to calculate the Bit Error Ratio (BER). Spread spectrum system techniques can be used to hide a signal by transmitting it at low power thus avoiding interference. BFSK modulation and demodulation technique is used in this project for the purpose of providing security to the proposed work. One of the main reasons behind using BFSK modulation and demodulation technique is the ease of detecting the information about the type of the target, while it was not possible with the previously employed techniques. MATLAB coding and simulation are used for the purpose of obtaining desired results