A communication method includes: a transmitting end obtains a first DMRS sequence and a first sequence, where the first sequence is obtained by performing repetition, frequency domain phase offset, or time domain cyclic shift on the first DMRS sequence. The transmitting end transmits first information, where the first information includes the first DMRS sequence and the first sequence, the first information occupies M symbols, the first DMRS sequence occupies M1 symbols among the M symbols, the first sequence occupies M2 symbols among the M symbols, and M1, M2, and M are all positive integers.