Transmission de-correlator for eliminating interference in a CDMA communication system
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United States of America Patent
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Mar 19, 1996
Grant Date -
N/A
app pub date -
Jul 28, 1994
filing date -
Jul 30, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A base station of a CDMA communication system includes a transmission de-correlator for eliminating interferences between communication channels of a downlink. The transmission de-correlator has a memory storing a set of data representative of the products of transmission information bits for the respective channels, and the sums of the products of the spread code data sequences for the respective channels, and the elements of an inverse matrix with respect to a predetermined matrix of a cross-correlation between the spread code data sequences for the respective channels. The sums correspond to additions of the products along a direction of columns or to additions of the products along a direction of rows of the inverse matrix. A counting device is operative for causing the memory to sequentially output the data therefrom. An adder serves to calculate a sum of the data outputted from the memory.
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