Abstract: In this paper, bandpass sampling and subspace reconstruction methods of ultra-wideband (UWB) signals are proposed, which can greatly reduce the sampling rate in UWB communications. The UWB signals are passed through a bandpass filter and sampled at several times of the innovation rate. Then the amplitudes and time shifts of UWB signals can be obtained by subspace reconstruction method. Analysis and simulation results show that the subspace method can precisely reconstruct the UWB signals at a sampling rate which is much lower than Nyquist rate.