Method and apparatus for data transmission using time gated frequency division duplexing
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United States of America Patent
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-
Feb 6, 2001
Grant Date -
N/A
app pub date -
Jul 23, 1997
filing date -
Jul 23, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a time gated frequency division duplexing (FDD) data communication system, the base station transmits two data frames on the forward link to the first remote station and receives two data frames on the reverse link from the second remote station at the first time frame. At the second time frame, the base station transmits two data frames to the second remote station and receives two data frames from the first remote station. Data transmission and reception alternate over consecutive time frames. On the forward link, each data frame is covered with a unique Walsh code. The data is also spread with the short PN.sub.I and PN.sub.Q codes in accordance with the IS-95A standard. The data can be scrambled by the long PN code. The base station delays the long PN code and short PN codes and properly loads the Walsh codes so that the processed data can be properly demodulated and descrambled by the destination remote station.
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