Signal modulation method and system based on dual-mode index OSDM

The invention provides a signal modulation method and system based on a dual-mode index OSDM, and the method comprises the steps: carrying out the grouping of input data bits, mapping each group into an OSDM block, and dividing the group into two parts; one part of bits enter an index selector to generate a pattern, and the other part of bits are respectively mapped to two different bit modulation modes and are combined to obtain data of each block after index modulation; carrying out OSDM block processing on the obtained multiple groups of data, then carrying out OSDM modulation, and multiplexing the multiple groups of data into one path of data; and performing channel impulse response on the multiplexed data to obtain a signal subjected to channel equalization, and obtaining each block of equalized signal. According to the invention, the data can be implicitly transmitted through the activation pattern and can be transmitted through all carriers at the same time, so that the throughput of the OSDM system is