Correlation of long sequences by a surface-acoustic-wave convolver, with application to spread-spectrum communication
D.P. Morgan, J.M. Hannah · Electronics Letters · 1975
Segments of a long biphase coded waveform were correlated in a surface-acoustic-wave convolver, and the resulting correlation peaks were summed in a recirculation loop. With a 5 MHz chip rate, 250 μs of the waveform was integrated, giving an experimental s.n.r. improvement of 36 dB. The application to fast synchronisation in spread-spectrum communication is discussed.