Multi-carrier-code-shift-keying modulation

This paper proposes a new modulation format suited to power- and band-limited, non-frequency selective channels. It is considered here for satellite broadcast and broadband applications. The proposed format uses combinations of Gold sequences transmitted through a spectral-efficient multi-carrier format with orthogonal frequency-division multiplexing (OFDM). We present the modulation design as well as an analytical approximation of the performances and a comparison with existing modulations. The focus is put on the power efficiency improvement. Moreover, the multi-carrier format alleviates the receiver synchronization and improves the spectral efficiency. The critical issue of Peak-to-Average-Power Ratio (PAPR) distribution and reduction is finally discussed.