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A new receiver structure for asynchronous CDMA: STAR-the spatio-temporal array-receiver

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2 Author(s)
Affes, S. ; INRS Telecommun., Verdun, Que., Canada ; Mermelstein, P.

We propose a spatio-temporal array-receiver (STAR) for asynchronous code division multiple access (CDMA), using a new space/time structural approach. First, STAR performs blind identification and equalization of the propagation channel from each mobile transmitter. Second, it provides fast and accurate estimates of the number, relative magnitude, and delay of the multipath components. From this space/time separation, STAR reconstructs the identified channel with respect to a partially revealed space/time structure and reduces identification errors by the order of the ratio of the processing gain and the number of paths. Therefore, STAR offers a high potential for increasing capacity, with relatively low computational complexity. Simulations confirm the good multipath acquisition and tracking properties of STAR in the presence of strong interference and fast Doppler

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Selected Areas in Communications, IEEE Journal on  (Volume:16 ,  Issue: 8 )