Single Carrier/Carrierless Modulation and Coding

This chapter presents a review of carrier‐less and single carrier modulation schemes for visible light communication (VLC). The chapter also offers a brief introduction of modulation and coding techniques recently developed for dimming control and flicker mitigation to meet the illumination requirements. Dimming control can be achieved and the simplicity and robustness inherited from pulse position modulation (PPM) can be maintained. CAP is a bandwidth‐efficient two‐dimensional (2‐D) passband transmission scheme. The basic principle of CAP is to choose two orthogonal ?lters to modulate two different data streams, which are combined for simultaneous transmission. Alternatively, the CAP transceiver can be regarded as a trans‐multiplexer. The shaping filter at the transmitter is implemented by an up‐sampled finite impulse response (FIR) window from the original continuous‐time non‐causal signal, while the equalizer at the receiver is down sampled to match the original symbol rate.