Frequency-domain equalization in an OFDM-UWB system for short-range indoor wireless communications is discussed. This system uses a 128-point fast Fourier transform (FFT) pair at the transmitter and receiver. While the conventional approach is to use a bank of one-tap equalizers, it is known that the output signal constellation exhibits residual intersymbol interference (ISI). To minimize this residual ISI, a bank of two-tap adaptive linear least-mean square (LMS) equalizers is proposed. Simulation results show that an average 1 dB improvement in signal-to-noise ratio (SNR) is achieved. In some cases, up to 2 dB of improvement can be gain through the use of a two-tap equalizaer. It is also shown that the performance of an OFDM-UWB system may degrade under relatively mild multipath conditions, due to the presence of deep nulls in the average spectral characteristics of the channel.