Executive Summary : | Pulse compression by Barker code relies on effective Matched Filtering (MF) to match the reception of radar or spread spectrum communication systems. sidelobe reduction in MF output is an active research area for improving range resolution and is beneficial for Indian weather radar establishments. The sT (stratosphere-Troposphere)-Radar establishment at Calcutta University and Gauwahati University aims to forecast and nowcast atmospheric phenomena for various sectors. The choice of codes, baud length, and code length is directly related to the transmitting pulse width in pulse radar and power handling, which is important for improving target range resolution and elongating target detection ranges in different atmospheric layers. The proposal is to form compound Barker codes from available codes to the sT-Radar, which will lengthen the pulse width with longer codes without reducing baud length and range resolution. The increased average power will be used to extend the radar range beyond the achieved 20 km range. The effectiveness of this operation depends on efficient signal processing for sidelobe reduction in MF output. The plan is to obtain mismatched (MMF) transfer function for compound Barker code reception by sT-Radar, requiring joint optimization on transmit waveform and MMF design. Improved sNR using compound Barker code will be achieved, and the same MMF can be applied to available sT/MsT-Radars of India and abroad. |