发明名称 |
A MODULATION TECHNIQUE FOR TRANSMITTING MULTIPLE HIGH DATA RATE SIGNALS THROUGH A BAND LIMITED CHANNEL |
摘要 |
A digital data modulator (Fig. 11) includes a source of a plurality of digital data signals having a common data bit period. A plurality of encoders each encode a corresponding one of the plurality of digital data signals using a variable pulse width code having edges occurring in respective non-overlapping intervals with the data bit period. A plurality of pulse signal generators each generate respective pulses representing the edges of the corresponding one of the encoded plurality of digital data signals. A carrier signal generator generates a carrier signal having carrier pulses corresponding to the respective pulses. A digital data demodulator (Fig. 12) includes a source of a modulated signal including successive bit periods, each bit period having a plurality of non-overlapping intervals respectively associated with corresponding intervals in successive bit periods, each interval containing a carrier pulse, spaced relative to carrier pulses in other associated intervals, representing a corresponding variable pulse width encoded digital data signal. A detector demodulates the modulated signal to generate pulses corresponding to received carrier pulses. A plurality of decoders each decode pulses received in a respective one of the plurality of associated intervals in the bit period to generate the corresponding digital data signal. |
申请公布号 |
WO0209381(A2) |
申请公布日期 |
2002.01.31 |
申请号 |
WO2001US22958 |
申请日期 |
2001.07.20 |
申请人 |
THOMSON LICENSING S.A.;MOHAN, CHANDRA;MAJUMDAR, JAYANTA |
发明人 |
MOHAN, CHANDRA;MAJUMDAR, JAYANTA |
分类号 |
H03C3/00;H04B1/26;H04L5/02;H04L25/49;H04L27/00 |
主分类号 |
H03C3/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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