A method of connecting heterogeneous devices to a network is provided. The method includes providing base stations connected to a network, and at each of the base stations, receiving probe signals from terminal devices working on different frequency bands. For each of the terminal devices, the base station calculates a signature waveform based on a time-reversed waveform of a channel response signal derived from the corresponding probe signal. For each of the terminal devices, the base station determines a downlink transmit signal for the terminal device based on the downlink data and the corresponding signature waveform, and transmits the downlink signals to the heterogeneous terminal devices using a single radio-frequency front-end. Besides supporting heterogeneous terminal devices simultaneously, the heterogeneous time-reversal system has features such as asymmetric complexity architecture, which is better for the low-complexity and energy-efficiency requirements of terminal devices in the Internet of Things.