Simultaneous analog and digital communication using fractional rate encoding.

摘要

Digital data is encoded using a modulus m converter 700 to produce fractionally encoded words, where m is the nearest integer larger than 2 and c is a noninteger. The fractionally encoded words are mapped into a symbol constellation having m symbols to produce a two dimensional data signal 62, 63. The data signal is added to a two dimensional analog signal, which was obtained by encoding an input analog signal, to produce a combined two dimensional signal. The combined signal is modulated using QAM and then transmitted over a communication channel.