A scheme of single sideband vector millimeter wave signal generation and transmission based on double parallel Mach-Zehnder modulators (DP-MZM) is proposed.Under the joint simulation environment of MATLAB and VPI,the generation and transmission performance of different modulation formats in 90 GHz band are analyzed.In the simulation,when the DP-MZM works in the optical carrier suppression (OCS) mode,the single sideband signals of the two submodulators driven by small signal superimpose each other without the use of filters,the center carrier can be completely suppressed.The results show that the bit error rate (BER) of each modulation signal can reach the hard decision forward error correction (HD-FEC) threshold.The error performance of the quadrature amplitude modulation signal after probability shaping is obviously better than that of the uniform quadrature amplitude modulation signal,and the power gain of the 7 bit/symbol probility shaping 256 quadrature amplitude modulation (PS-256QAM) signal after systematic transmission is the most obvious,the power gain of 2.94 dB is increased after transmission of 50 km optical fibers.Compared with the existing schemes of carrier supresion millimeter wave,the system has the advantages of simple structure,high adjustability and obvious signal transmission gain,so it has certain application value.