Receiver for pilot-aided code-division multiple access

Details Receiver for pilot-aided code-division multiple access Receiver for pilot-aided code-division multiple access

1997-11-28

2000-10-31

Patel, Ajit

Multiplex communications

Communication over free space

Combining or distributing information via code word channels...

375130, H04B 7216, H04B 169

Patent

active

061413348

ABSTRACT:
A pilot-aided rake receiver suitable for CDMA wireless telecommunications is disclosed. Some rake receivers in accordance with the present invention require fewer computational resources to be consumed by the conjugate pilot estimate multipliers than some pilot-aided rake receivers in the prior art. One embodiment of the present invention comprises: N rake receiver fmgers, wherein each of the N rake receiver fingers outputs an information-bearing signal, I.sub.i (n), and a conjugate pilot estimate, P.sub.i (n); N multipliers; and an N.times.N switch interposed between the N rake receivers and the N multipliers for routing the information-bearing signal, I.sub.i (n), and the conjugate pilot estimate, P.sub.i (n), from any of the N rake receiver fingers to any of the N multipliers. In some embodiments of the present invention, the N multipliers are pooled and shared by the resources (e.g., rake receiver fingers, coherent combiners, etc.) associated with a plurality of users.

REFERENCES:
patent: 5428602 (1995-06-01), Kemppainen
patent: 5621752 (1997-04-01), Antonio et al.
patent: 5648968 (1997-07-01), Reudink
patent: 5920552 (1999-07-01), Allpress et al.
patent: 5930288 (1999-07-01), Eberhardt
CDMA: Principals of Spread Spectrum Communication, Andrew J. Viterbi, Addison-Wesley Publishing Company, 1995, pp. 87-96.

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