Patent ID: 8040974

Claim:
A shift space-time coding (SSTC) system for digital broadcasting, the system comprising: a first SSTC component, comprising: a first channel encoder having an input receiving a high-priority bit stream and an output supplying a first channel-encoded bit stream; a QAM symbol mapper having an input receiving the first channel-encoded bit stream and an output supplying a QAM-modulated symbol sequence; and a first adder comprising: a first input receiving the QAM-modulated symbol sequence; a second input; and an output supplying a first shift space-time-encoded symbol sequence; and a second SSTC component, comprising: a second channel encoder having an input receiving a low-priority bit stream and an output supplying a second channel-encoded bit stream; an STBC encoder having an input receiving the second channel-encoded bit stream and two outputs supplying a first STBC-modulated symbol sequence to the second input of the first adder and a second STBC-modulated symbol sequence; and a second adder, comprising: a first input receiving the second STBC-modulated symbol sequence; a second input receiving the QAM-modulated symbol sequence; and an output supplying a second shift space-time-encoded symbol sequence.