Patent ID: 6175316
Filing Date: 2001-01-16
Classification: H03M,H04L

Abstract:
An apparatus for encoding data in a communication system comprising:an encoder configured for receiving a data frame comprised of a plurality of data bits and encoding the data frame into a plurality of encoded tones for transmission over a medium; anda transmitting device configured for receiving the plurality of encoded tones, assembling the plurality of encoded tones into a data symbol and transmitting the symbol over the medium to one or more receiving nodes;the encoder having a plurality of differential encoding devices, each of the plurality of differential encoding devices configured to receive a data input comprised of a predetermined number of bits from the plurality of bits and output an encoded tone, and wherein each differential encoding device encodes the predetermined number of bits based on one of a reference tone and an encoded tone output from another one of the plurality of differential encoding devices, and outputs the encoded tone to the transmitting device.