System and method for digital transmission and modulation of conjugate pulse position
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United States of America Patent
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May 26, 2009
Grant Date -
Jul 15, 2004
app pub date -
Dec 19, 2003
filing date -
Dec 24, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a communication system comprising a modulator, encoder, decoder, demodulator, and a data input source, which employs an improved modulation technique by effectively utilizing the conjugate signal space in Digital Pulse Position Modulation (DPPM) format. This technique utilizes multiple the DPPM formats, whereby M data bits are conveyed by splitting them into sets of k bits. The split data are encoded to have forward and conjugate pulse positions for transmission over a transmission channel, which are discriminated and combined into a M-bit digital output. The system and method achieve superior characteristics in terms of data rate, channel utilization and coding efficiency.
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