Fractional rate modulation is accomplished by separating incoming data into frames of bits. Each frame in partitioned into bit words of unequal lengths. The words are divided by a modulus to obtain remainders. The remainders are transmitted using, for example, QAM modulation. At the receiving end, the...http://www.google.com/patents/US5280503?utm_source=gb-gplus-sharePatent US5280503 - Data communication system with data rate throttling
