Spread spectrum communication system and transmission power control method therefor
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United States of America Patent
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Feb 9, 1999
Issued Date -
N/A
app pub date -
Jul 11, 1996
filing date -
Jan 20, 1995
priority date (Note) -
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Abstract
In a spread spectrum communication system, one (W.sub.n) of a series of orthogonal codes for spectrum spreading is assigned to signal-to-noise ratio measurement in a terminal. On the basis of a noise signal detected by de-spreading a signal received from an antenna with the above described orthogonal code W.sub.n and a pilot signal, each terminal derives a signal-to-noise ratio. Each terminal transmits the signal-to-noise ratio to the base station as a power control signal. On the basis of signal-to-noise information received from each terminal as the power control signal, the base station controls signal transmission power for each terminal.
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