Sidelobe reduction techniques for range-resolution radar

This paper mainly discusses the technique used to reduce sidelobes for polyphase pulse compression codes. A brief explanation is given on pulse compression and range resolution. Binary, ternary, quinquenary, multilevel and Barker codes are also discussed. The details of polyphase pulse compression code that comprises Frank code, Extended Frank code, P3 and P4 codes are described. The basic theory on autocorrelation and discrimination is explained briefly. Furthermore, sidelobe reduction techniques for polyphase pulse compression codes are discussed in this paper. The technique of least square amplitude and phase weighting is focussed on P4, binary and ternary codes.. Finally, comparison of mean square error is made between different choices like all sidelobes reduction, some sidelobes reduction etc. to conclude which type of choice; the reduction technique is achieving less error thus providing a good reduction in autocorrelation with maintaining the same mainlobe level.