Abstract: A channel model for indoor office environment is proposed based on frequency-domain measurements according to the ultra wideband(UWB)frequency regulation specification of China.The modified Saleh-Valenzuela(S-V)model is exploited as the channel model.A quasi-Gaussian window with Gaussian transition band is used to extract the measurements that specified by the UWB frequency regulation of China from the time-domain measurements in the post-processing of channel modeling. Furthermore,the CLEAN algorithm is used to estimate the discrete channel response and a wavelet analysis based automatic cluster identification algorithm is proposed for the time-domain measurements.Both the large and small scale channel parameters are extracted based on statistical approach.Compared with the IEEE 802.15.4a channel model,simulation results show that the proposed office channel model matches the measurement data better on the channel characteristics of delay spread and the average number of paths.