Intra-Pulse Polyphase Coding System for Second Trip Suppression in a Weather Radar

TL;DR

This paper presents a novel intra-pulse polyphase coding system designed to improve second trip suppression in weather radar, demonstrating its effectiveness on NASA's D3R radar system.

Contribution

It introduces a new code design framework optimizing polyphase codes and filters specifically for weather radar second trip removal.

Findings

Effective second trip suppression demonstrated on NASA D3R radar

Optimized codes improve correlation properties for weather radar signals

Framework enhances intra-pulse coding performance in weather radar applications

Abstract

This paper describes the design and implementation of intra-pulse polyphase codes for a weather radar system. Algorithms to generate codes with good correlation properties are discussed. Thereafter, a new design framework is described, which optimizes the polyphase code and corresponding mismatched filter, using a cost/error function, especially for weather radars. It establishes the performance of these intra-pulse techniques with specific application towards second trip removal. The developed code is implemented on NASA D3R, which is a dual-frequency, dual-polarization, Doppler weather radar system.