A terminal device receives first indication information, where the first indication information indicates the first configuration information of a first signal, and the first configuration information at least includes information about a first resource and a first antenna port number. The terminal device receives the first signal on the first resource and receives a second signal on a second resource, where a second antenna port number corresponding to the second signal is different from the first antenna port number, and the first resource and the second resource overlap. The terminal device determines information in the second signal based on the first signal. In a possible design, the terminal device may determine, based on the first configuration information sent by a network device, a signal sequence carried by the first signal.