The invention provides a communication and navigation integrated
signal transmission method based on OCDM, and relates to the field of
signal transmission, and the method comprises the steps: obtaining a target transmission symbol sequence carrying navigation data and communication data; generating a group of orthogonal
chirp carrier signals divided into a navigation
subcarrier block and a communication
subcarrier block, wherein the
pilot frequency proportion of the navigation
subcarrier block is greater than that of the communication subcarrier block; and modulating preset
pilot frequency data, navigation data and communication data to the subcarrier signals in the corresponding subcarrier blocks, superposing the modulated subcarrier block signals to obtain a sending
signal, and sending the sending signal to a receiving end. Through the mode, integrated transmission of communication and navigation data under a unified signal framework can be realized, the problems of weak cooperative capability and spectrum resource waste of a traditional communication and
navigation system are effectively solved, the spectrum utilization efficiency is improved,
dynamic balance of communication efficiency and navigation precision can also be realized, and the communication and navigation efficiency is improved. And the flexibility and expansibility of signal transmission are improved.