Two-valued and three-valued integrand codes for real-valued self-orthogonal finite-length sequence

A real-valued self-orthogonal finite-length sequence has a zero sidelobe autocorrelation function, but requires linearity of the transmitter amplifier. The paper proposes two-valued and three-valued integrand codes in order to transmit the real-valued self-orthogonal finite-length sequence. The codes are integrated through a transmission path and lead to those with a chip waveform similar to a one-cycle sine pulse. The correlation output for the three-valued integrand code takes a lower sidelobe error than that for the two-valued integrand code.