Abstract: In long-range ad-hoc networks, multi-user phased array radar wideband communication seems promising for improving signal power, reducing interference, and greatly increasing system sum spectral efficiency. Proper wideband beamforming scheme is required to obtain these advantages. For the angle-based maximum-ratio combining (MRC) beamforming, the inter-user interference is not suppressed, leading to a great loss of system sum spectral efficiency. An angle-based minimum mean square error (MMSE) beamforming scheme is proposed to suppress inter-user interference and increase system sum spectral efficiency. Further, considering the angle-spread of wideband signals, a wideband MMSE beamforming scheme is proposed using the method of zero-point extension. Numerical results show that compared to angle-based MRC and MMSE beamforming schemes, the proposed wideband beamforming scheme can effectively suppress inter-user wideband interference and greatly increase system sum spectral efficiency.