Channel sounding for a spread-spectrum signal
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United States of America Patent
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-
Mar 23, 2004
Grant Date -
Nov 15, 2001
app pub date -
Jul 19, 2001
filing date -
Jan 14, 1999
priority date (Note) -
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status (Latency Note)
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Abstract
An improvement to a spread-spectrum code-division-multiple-access system, using a channel sounding signal from a base station (BS) to provide initial transmitter power levels for remote stations (RS). The base station transmits BS-spread-spectrum signals at a first frequency and receives RS-spread-spectrum signals, which are transmitted by the remote stations at the second frequency. The base station transmits a BS-channel-sounding signal at the same carrier frequency being used by the remote stations. The bandwidth of the BS-channel-sounding signal is much less than the bandwidth of the BS-channel-spread-spectrum signal. Each remote station tracks the BS-channel-sounding signal, for adjusting the initial RS-power level.
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