  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.
