VSB TRANSMISSION SYSTEM
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Abstract
A vestigial sideband (VSB) modulation transmission system and a method for encoding an input signal in the system are disclosed. According to the present invention, the VSB transmission system includes a convolutional encoder for encoding an input signal, a trellis-coded modulation (TCM) encoder for encoding the convolutionally encoded signal, and a signal mapper mapping the trellis-coded signal to generate a corresponding output signal. Different types of the convolutional encoders are explored, and the experimental results showing the performances of the VSB systems incorporating each type of encoders reveals that a reliable data transmission can be achieved even at a lower input signal to noise ratio when a convolutional encoder is used as an error-correcting encoder in a VSB system.
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Citations
28 Claims
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1-12. -12. (canceled)
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13. A method of processing data in a transmission system, the method comprising:
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performing first error correction (FEC) encoding on first data in a first FEC encoder, the first data being input to the FEC encoder through a first path; multiplexing the FEC-encoded first data with second data in a multiplexer, the second data being input to the multiplexer through a second path different from the first path; performing second FEC encoding on the multiplexed first and second data in a second FEC encoder; and mapping the FEC-encoded first and second data in a mapper. - View Dependent Claims (14, 15, 16)
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17. A transmission system for processing data, the transmission system comprising:
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a first forward error correction (FEC) encoder for performing first FEC encoding on first data, the first data being input to the FEC encoder through a first path; a multiplexer for multiplexing the FEC-encoded first data with second data, the second data being input to the multiplexer through a second path different from the first path; a second FEC encoder for performing second FEC encoding on the multiplexed first and second data; and a mapper for mapping the FEC-encoded first and second data. - View Dependent Claims (18, 19, 20)
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21. A method of processing data in a receiver, the method comprising:
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receiving a signal in a receiving unit, the signal including first data multiplexed with second data; demapping the first and second data in a demapping unit; performing first forward error correction (FEC) decoding on the demapped first and second data in a first FEC decoder; demultiplexing the FEC-decoded first data from the FEC-decoded second data in a demultiplexer, the FEC-decoded second data being output through a first path; and performing second FEC decoding on the demultiplexed first data in a second FEC decoder, the second FEC-decoded first data being output through a second path different from the first path. - View Dependent Claims (22, 23, 24)
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25. A receiver for processing data, the receiver comprising:
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a receiving unit for receiving a signal including first data multiplexed with second data, a demapping unit for demapping the first and second data; a first forward error correction (FEC) decoder for performing first FEC decoding on the demapped first and second data; a demultiplexer for demultiplexing the FEC-decoded first data from the FEC-decoded second data, the FEC-decoded second data being output through a first path; and a second FEC decoder for performing second FEC decoding on the demultiplexed first data, the second FEC-decoded first data being output through a second path different from the first path. - View Dependent Claims (26, 27, 28)
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Specification