A multifrequency radar signal is considered. It employs M subcarriers simultaneously. The subcarriers are phase modulated by M different sequences that constitute a complementary set. Such a set can be constructed, for example, from the M cyclic shifts of a perfect phase-coded sequence of length M (e.g., P4). The subcarriers are separated by the inverse of the duration of a phase element tb, yielding Orthogonal Frequency Division Multiplexing (OFDM), well known in communications. The signal exhibits a thumbtack ambiguity function with delay resolution of tb/M. The power spectrum is relatively flat, with width of M/tb. The signal can be constructed by power combining M fixed-amplitude signals. The resulting signal, however, is of variable amplitude.
|Number of pages||6|
|State||Published - 2000|
|Event||IEEE 2000 International Radar Conference - Alexandria, VA, USA|
Duration: 7 May 2000 → 12 May 2000
|Conference||IEEE 2000 International Radar Conference|
|City||Alexandria, VA, USA|
|Period||7/05/00 → 12/05/00|