Carrier acquisition technique for mobile radio QPSK demodulator

Details Carrier acquisition technique for mobile radio QPSK demodulator Carrier acquisition technique for mobile radio QPSK demodulator

1994-10-13

1997-01-28

Chin, Stephen

Pulse or digital communications

Receivers

Automatic frequency control

4551921, 4551922, H03D 100

Patent

active

055984410

ABSTRACT:
A method and apparatus for estimating a frequency of a received carrier wave in a Quadrature Phase Shift Keying (QPSK) system. The invention uses a combination of an FFT, DFT bins, and three point interpolation to estimate a frequency of the carrier wave. The system is robust and compensates for multipath fading and other types of signal degradation.

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Connelly, "Design of the Westinghouse Series 1000 Mobile Phone," IEEE, pp. 347-350, May 18, 1993.
Connelly, "The Westinghouse Series 1000 Mobile Phone: Technology and Applications," IEEE, pp. 375-379, May 18, 1993.

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