60GHz millimeter wave (mmWave) communication systems with Gbps transmission rate have become a new research hotspot in the latest years. In this paper, 65.5GHz mmWave channel propagation characteristics in an indoor conference environment is studied. First, based on the method of shooting and bouncing ray tracing (SBR), an indoor line-of-sight scenario (LoS) is simulated. Then, the accuracy of the SBR method is verified by comparing the measured and simulated results of path loss and root mean square delay (RMS DS). Final, the power delay angle profile (PDAP) of the azimuth of arrival (AOA) and elevation of arrival (AOD), Ricean K-Factor (KF) are simulated and analyzed. The results demonstrate that the arrival angle of the received signals is correlated to the height of the transceiver antenna, the half-power beam width (HPBW) and the maximum gain direction. The KF in LOS scenario follows the normal distribution.