Reduction of Envelope Fluctuations in OFDM Radar Signals Using Coding Technique

The design of waveforms play an important role in the performance of radar systems. Multicarrier complementary phase-coded signal has been a field of interest for many researchers due to its prominent properties. This paper aims to reduce the Peak-to-Mean Envelope Power Ratio (PMEPR) of a Multicarrier Complementary Phase-Coded (MCPC) signal consisting of P subcarriers which are phase modulated by P phase sequences. The carriers are equally separated in terms of frequency. The carrier separation is equal to the reciprocal of t
_c
, which is equal to the span of each phase element, forming Orthogonal Frequency Division Multiplexing (OFDM). In this paper we propose a new approach to generate MCPC signal using Complementary Block Coding (CBC) method which has lower value of PMEPR in comparison with the conventional method.