Importance

Loading Importance Indicators...

Abstract

Data is transmitted via a signal containing a number of simultaneously active modulated frequency channels. The data is encoded in an error protecting code. Successive data items are mapped pseudo-randomly to different frequency channels. This protects against fading which affects frequency channels that are located at periodic distances from each other. The pseudo random mapping is realized by writing the data-items into memory in one order and reading them from memory in another order. Successive signals are each modulated in this way. The memory locations vacated upon reading data items for the modulation of one signal are filled by data-items for modulating the next successive signal. This is kept up by permuting the order of the memory locations in which the data-items are written for each successive signal.

Loading the Abstract Image...

First Claim