C Program for Spherical Azimuth Angle Algorithm and Related Signal Processing Methods

A collection of C and MATLAB algorithms for signal processing and communications. Features spherical azimuth calculation (azimuth.cpp), fast CRC checksum implementation (CRC_Table.cpp), descrambling algorithm (scrambler.cpp), MATLAB signal bandwidth measurement (BandWith.m), bandpass signal down-conversion (fqmv.m), QPSK demodulation (demodQpsk.m), Welch power spectral density estimation (psdwh.m), mean filtering (cvmn.m), and signal orthogonal decomposition (Cnv2Bas.m). Each implementation includes optimized code structures and mathematical foundations.