A new method for the transmission of intelligence by means of a signal having certain correlation properties has been evolved. The theoretical and practical aspects of this concept are presented. An important advantage of these techniques is that for a fixed performance criteria, considerably higher speeds are possible compared to the presently known methods. In addition, the implementation is simple and straightforward. An unusual property of these techniques is the capability of error detection without the introduction of redundancy into the original data. Finally, expressions for spectral distributions and error performance as well as methods for practical implementation, including the errordetection process, are presented.