The modulation technique is one of the important factors affected the quality of optical wireless communication. It need to find the appropriate modulation scheme, and it is necessary to analyze the performances of different pulse modulation schemes completely and deeply. The symbol structures of not only traditional modulation scheme like pulse position modulation (PPM) and digital pulse interval modulation (DPIM) but also new hybrid modulation scheme such as pulse position width modulation (PPWM), differential pulse position width modulation (DPPWM), dual- amplitude pulse position modulation and dual- amplitude pulse interval modulation (DAPIM) are analyzed in detail. The average transmission power and bandwidth efficiency for these above modulation schemes are also analyzed. At last, the error performances of these different modulation schemes are derived in detail. The numerical results show that the power utilization of DAPPM is the best and DPPWM’s is the worst; when the value of binary bits M is given, the bandwidth utilization of DPPWM is the best, but PPM’s is the worst. With the increase of M , the bandwidth utilization of DAPPM is near to DPIM’s. When the values of M and signal to noise ratio RSN are given, the packet error rate of DAPPM is near to PPM’s, but they are better than the others. The packet error rate is gradually reduced with the increase of M and RSN . At the same time, through the enlargement of r or the decrease of α , the error performances of PPWM and DAPPM are partly improved. Consequently, the appropriate modulation scheme is need to be selected according to the system’s demand.