Channel estimation unit, and CDMA receiver and CDMA transceiver with channel estimation unit
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United States of America Patent
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-
Nov 11, 2003
Issued Date -
N/A
app pub date -
Jul 20, 1999
filing date -
Nov 21, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
There are provided a channel estimation unit for achieving highly accurate channel estimation, a CDMA receiver and a CDMA transceiver with the channel estimation unit. Channel estimates of data symbols are obtained from a pilot symbol sequence which is parallel with a data symbol sequence. First, a plurality of pilot blocks are generated from the pilot symbol sequence. The channel estimates of the data symbols are obtained by calculating a sum of appropriately weighted averages of pilot symbols in the individual pilot blocks. This enables highly accurate channel estimation. More accurate channel estimation can be achieved by carrying out the channel estimation of the data symbols using the pilot symbols belonging to other slots rather than limiting to the pilot symbols in the slot to which the estimated data symbol belongs.
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