STBC-LoRa receiver signal receiving method based on wide linear beam forming

The invention discloses an STBC-LoRa receiver signal receiving method based on wide linear beam forming, and the method comprises the steps: 1, carrying out the wide linear expansion of a to-be-detected signal obtained on a receiver, and obtaining an augmented received signal; 2, training a weight coefficient of beam forming according to an MMSE (Minimum Mean Square Error) criterion through a pilot symbol carried in LoRa communication; and multiplying the obtained weight coefficient by a corresponding signal to be detected to obtain an estimation signal. Compared with a traditional STBC decoding scheme, the algorithm improves the decoding performance in a multi-user interference scene, and 2Nr users can be supported to communicate at the same time at most under the condition of Nr receiving antennas; under the condition of two receiving antennas, the wide linear beam forming receiving algorithm can realize communication under the condition of 0-3 interference users, namely, at most four users are supported to