The textbook "Digital holography. Holographic coding" is intended for training of bachelors and masters in the group of directions and specialties 110000 "Electronics, radio engineering and communication systems". The transfer of the principles of holographic image processing to the coding of arbitrary digital data is described. Holographic methods of noise-immune coding, allowing to correct multiple errors, are considered. High noise immunity of holographic method of information processing allows to increase the range, speed and reliability of information transmission via optical communication lines and radio channels, to increase the reliability of information storage and accuracy of GLONASS system positioning. The principles of using optical methods of information transmission in the radio channel are outlined.