ABSTRACT The frequency bands used in mobile communications are allocated according to the type of application. With the need for more channels, the frequency spectrum has become a scarce natural resource. This study shows the results of a proposed modulation using a variation of the autocorrelation of pseudo-random codes to carry information. The work also presents the generation of multiple orthogonal axes to increase the bit rate thus improving the channel efficiency.
Cite this paper
Carvalho, F. and Walter, F. (2013) Modulation for Digital Radio Broadcasting Using Amplitude Autocorrelation of Pseudo Random Noise Codes to Carry Information. Communications and Network, 5, 57-64. doi: 10.4236/cn.2013.53B2012.
 J. B. Y. Tsui, Fundamentals of Global Positioning System Receivers, A software approach. Wiley Interscience Publicantion, 2000. doi:10.1002/0471200549
 Carvalho, F. A. Alexandre B. V. Oliveira and F. Walter: “Receptor GPS em Software. In: 25th Brazilian Symposium on Telecommunications - XXV SBrT 2007, Recife, PE, Brasil, set, 03 a 07.
 Carvalho, F. A. and F. Walter, “Receptor GPS por Software em Tempo Real. Parte I: Geraão dos Sinais”, The Annals of 12th Meeting of Undergraduate and Graduate Research of ITA – XII ENCITA / 2006, São José ; dos Campos, SP, Brasil, out., 16 a 19.
 Carvalho, F. A. and F. Walter, “Receptor GPS por Software em Tempo Real. Parte II: Correlator”, The annals of 12th Meeting of Undergraduate and Graduate Research of ITA – XII ENCITA / 2006, S?o José dos Campos, SP, Brasil, out., 16 a 19.