Aimed at the modulation technique used in indoor visible light communication systems, two power efficiency schemes named flip optical carrierless amplitude and phase modulation as well as unipolar optical carrierless amplitude and phase modulation are proposed in this paper. To ensure the signal be suitable for an intensity modulation/direct detection system, the first scheme forms the so called positive block and negative block based on the bipolar signal, the second utilizes a pair of samples including a zero level to mark signal polarity. Lambertian reflection model is introduced in visible light channel which is corrupted by additive white Gaussian noise. The theoretical bit error rate of the three modulation schemes involving DC biased optical carrierless amplitude and phase modulation over visible light transmission channel is derived. Meanwhile, the performance of bandwidth efficiency is analyzed and compared. Monte Carlo simulations is evaluated to corroborate the analysis. In addition, the effects of channel parameters on the system performance are discussed in this paper. The simulation results show that the bit error rate performances improve 6.9 dB and 29.9 dB when the radiation angle of LED is 0° compared with 30° and 45° in the room measuring 5 m×5 m×3 m. As the distance between the transmitter and receiver reduced from 2 m to 1 m, the optical carrierless amplitude and phase modulation system can obtain better performance of approximately 12 dB.