Method and apparatus for transmitting and receiving data using multi-user superposition coding in a wireless relay system
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United States of America Patent
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Apr 5, 2011
Grant Date -
Sep 18, 2008
app pub date -
Mar 17, 2008
filing date -
Mar 16, 2007
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus for joint unicast using multi-user superposition coding in a wireless relay system are provided. A BS superposition-encodes first and second data messages directed to first and second MSs, respectively, scheduled at a current scheduling instant. The first and second data messages carry first and second information bit streams for the first and second MSs, respectively. The first MS has a relatively good direct link to the BS, and the second MS has a relatively bad direct link to the BS. The superposition-coded data is transmitted to the first MS and an RS connected between the BS and the first and second MSs. The RS receives the superposition-coded data from the BS, extracts the second information bit stream by decoding the superposition-coded data, and transmits a third data message carrying the second information bit stream to the first and second MSs.
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