A Group Index Ofdm Communication Method Based on the Combination of Message and Random Sequence
A random sequence and communication method technology, applied in digital transmission systems, electrical components, transmission systems, etc., can solve problems such as poor anti-intercept performance, reduced anti-interference performance and spectral efficiency
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[0031] The present invention will be further described below in conjunction with the accompanying drawings.
[0032] It should be reminded that the described embodiments are only some of the embodiments of the present invention, but not all of the embodiments. The invention relates to a group index OFDM communication technology based on the combination of a random sequence and a message, belonging to the technical field of wireless communication. The principle of packet SIM-OFDM communication technology based on the combination of random sequence and message is to use the combination of message drive and random sequence drive to activate some subcarriers of each carrier block in each OFDM symbol to transmit modulation symbols, and other subcarriers remain silent. State, using the randomness of a PN sequence causes the relationship between the index bit and the distribution of the active carrier to also change randomly, making the index bit information more concealed. The pres...
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