Method and apparatus for receiving a wideband signal using multi

Details Method and apparatus for receiving a wideband signal using multi Method and apparatus for receiving a wideband signal using multi

1998-01-29

2000-06-20

Tsang, Fan

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

4552401, 4552411, 4552471, 375148, H04B 118

Patent

active

060787961

ABSTRACT:
A receiver (300) for use in a wideband code division multiple access (CDMA) wireless communication system is disclosed. The system conveys at least first and second CDMA signals by a carriers centered at first and second carrier frequencies. The receiver includes a radio frequency (RF) receiver front end (204) for receiving the first and second CDMA signals to yield a set of in-phase (I) and quaternary phase (Q) components. First and second filters (222, 224) responsive to mixers (210, 214) filter the set of in-phase (I) and quaternary phase (Q) components to produce a filtered first and second set of in-phase (I) and quaternary phase (Q) components. First and second digital automatic gain controllers (400) adjust the filtered first and second set of in-phase (I) and quaternary phase (Q) components to produce a gain adjusted first and second set of in-phase (I) and quaternary phase (Q) components for use in subsequent despreading.

REFERENCES:
patent: 4509206 (1985-04-01), Carpe et al.
patent: 4794343 (1988-12-01), Yang
patent: 5504775 (1996-04-01), Chouly et al.
patent: 5631921 (1997-05-01), Schilling
patent: 5678213 (1997-10-01), Myer

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