AN EFFICIENT SMART SYSTEM FOR IMPROVED SPACE/SPATIAL-FREQUENCY REPRESENTATION OF NONSTATIONARY 2-D SIGNALS

Multicycle implementation (MCI) of a signal adaptive two-dimensional (2-D) system for space/spatial-frequency (S/SF) analysis is proposed. The proposed design optimizes critical design performances related to the hardware complexity, making it a suitable system for real-time implementation on an integrated chip. It allows the implemented system to take a variable number of clock cycles (CLKs) (the only necessary ones regarding desirable-2-D Wigner distribution-presentation of auto-terms) in different frequency-frequency points during the execution. This ability represents the major advantage of the design which helps optimize the time required for execution and produce an improved, cross-terms-free S/SF signal representation. The implementation has been verified by an FPGA circuit design, capable of performing S/SF analysis of 2-D signals in real-time.