A signal detection method, comprising: performing channel estimation based on a signal received by each of antennae, to acquire a channel estimation matrix for transmitters multiplexing on identical time-frequency resources on each of the antennae; determining an equivalent Pattern Division Multiple Access, PDMA, channel estimation matrix for each of the antennae based on a PDMA encoding matrix and the channel estimation matrix for the transmitters multiplexing the identical time-frequency resources on each of the antennae, and acquiring an equivalent multi-antenna PDMA channel estimation matrix for the antennae based on the equivalent PDMA channel estimation matrix for each of the antennae; performing a joint detection based on the equivalent multi-antenna PDMA channel estimation matrix, an equivalent multi-antenna received signal vector and a set of constellation points of the transmitters multiplexing on the identical time-frequency resources, to acquire Log Likelihood Ratios, LLRs, for the transmitters, wherein the equivalent multi-antenna received signal vector is formed based on the signals received by the antennae; and decoding the LLRs for the transmitters, to acquire multi-user information at transmitting end, characterized in that the determining the equivalent PDMA channel estimation matrix for each of the antennae based on the PDMA encoding matrix and the channel estimation matrix for the transmitters multiplexing on the identical time-frequency resources on each of the antennae comprises: performing a calculation based on the channel estimation matrix for the transmitters multiplexing on the identical time-frequency resources on each of the antennae and the PDMA encoding matrix to acquire the equivalent PDMA channel estimation matrix for each of the antennae through an equation: H ^ PDMA n R = H PDMA, Pattern ⊙ H ^ CH, Data n R, wherein H ^ PDMA n R represents the equivalent PDMA channel estimation matrix for the ( n R) th antenna, H ^ CH, Data n R represents the channel estimation matrix for the transmitters multiplexing on the identical time-frequency resources on the ( n R) th antenna, H PDMA, Pattern represents the PDMA encoding matrix, and ⊙ represents multiplying corresponding elements in the H PDMA, Pattern and the H ^ CH, Data n R by each other, wherein the PDMA encoding matrix H PDMA, Pattern is defined as: H PDMA, Pattern = 1 1 ⋮ 1 1 ⋯ 0 1 0 ⋮ ⋱ ⋮ 0 ⋯ 1 ⋯ ⋯ 1 ⋯ 0 0 0 ⋮ ⋱ ⋮ 0 ⋯ 1 N × M wherein elements "1" represents a presence of data mapping, and the elements "1" in an identical column represents that an identical data is mapped, "0" represents an absence of data mapping, N represents a quantity of time-frequency Resource Elements (REs), and M represents a quantity of transmitters. performing channel estimation based on a signal received by each of antennae, to acquire a channel estimation matrix for transmitters multiplexing on identical time-frequency resources on each of the antennae; determining an equivalent Pattern Division Multiple Access, PDMA, channel estimation matrix for each of the antennae based on a PDMA encoding matrix and the channel estimation matrix for the transmitters multiplexing the identical time-frequency resources on each of the antennae, and acquiring an equivalent multi-antenna PDMA channel estimation matrix for the antennae based on the equivalent PDMA channel estimation matrix for each of the antennae; performing a joint detection based on the equivalent multi-antenna PDMA channel estimation matrix, an equivalent multi-antenna received signal vector and a set of constellation points of the transmitters multiplexing on the identical time-frequency resources, to acquire Log Likelihood Ratios, LLRs, for the transmitters, wherein the equivalent multi-antenna received signal vector is formed based on the signals received by the antennae; and decoding the LLRs for the transmitters, to acquire multi-user information at transmitting end, characterized in that the determining the equivalent PDMA channel estimation matrix for each of the antennae based on the PDMA encoding matrix and the channel estimation matrix for the transmitters multiplexing on the identical time-frequency resources on each of the antennae comprises: performing a calculation based on the channel estimation matrix for the transmitters multiplexing on the identical time-frequency resources on each of the antennae and the PDMA encoding matrix to acquire the equivalent PDMA channel estimation matrix for each of the antennae through an equation: wherein H ^ PDMA n R represents the equivalent PDMA channel estimation matrix for the ( n R) th antenna, H ^ CH, Data n R represents the channel estimation matrix for the transmitters multiplexing on the identical time-frequency resources on the ( n R) th antenna, H PDMA, Pattern represents the PDMA encoding matrix, and ⊙ represents multiplying corresponding elements in the H PDMA, Pattern and the H ^ CH, Data n R by each other, wherein the PDMA encoding matrix H PDMA, Pattern is defined as: