Redundancy system and methods for use with a telecommunication system

A redundancy system for co-channel telecommunications comprising:

• a first modem comprising:
• a FEC encoder configured to receive data to be transmitted via an input channel and generate FEC codewords;
• a symbol mapper configured to convert the FEC codewords into complex I/Q format;
• a premapped symbol interface (PMSI) ROM encoder configured to produce a constellation point number (CPN) value for each symbol to be transmitted using the FEC codewords and the modulation format;
• an encoder configured to encode the CPN values to produce three CPN value signals for transmission;
• a first symbol clock configured to generate a timing signal for the transmitted data signal;
• a RF down-conversion to complex digital baseband block configured to covert a received data signal to digital baseband;
• and
• an adaptive co-channel digital baseband canceller, a digital demodulator, and a FEC decoder configured to output the received decoded codewords via an output channel;
• a second modem comprising:
• a decoder configured to decode the three CPN value signals received from the encoder of the first modem;
• a second symbol clock configured to receive the timing signal generated by the first transmit symbol clock;
• a PMSI ROM decoder configured to decode the CPN values from the three received CPN value signals and generate complex I/Q values;
• an adaptive co-channel digital baseband canceller;
• a demodulator configured to demodulate the received data signal from the output of the adaptive co-channel digital baseband canceller;
• a FEC decoder configured to decode the received symbols to produce FEC codewords and output the received codewords via an output channel;
• an interface bus configured to transmit the three CPN value signals of the encoder and the timing signal from the first modem to the second modem when the first modem is online and the second modem is offline;
• and
• a redundancy switch configured to switch the input channel of data to be transmitted to a FEC encoder of the second modem and the output channel of the received codewords to a FEC decoder of the first modem in response to a redundancy switching signal such that the second modem becomes online and the first modem becomes offline.