Parameter measuring apparatus for digital quadrature modulation

Details Parameter measuring apparatus for digital quadrature modulation Parameter measuring apparatus for digital quadrature modulation

1997-03-31

1999-08-31

Le, Amanda T.

Pulse or digital communications

Receivers

Angle modulation

375332, 375340, 329304, H03D 322

Patent

active

059463597

ABSTRACT:
An input quadrature modulation signal which is converted into a digital signal is converted into a complex baseband signal in a converter 7. A rough estimation of parameters of the signal is made in a rough signal correction unit 51. Using the estimates, the complex baseband signal is corrected. Utilizing a data detection of the corrected signal, a reference signal which corresponds to a transmitted signal is formed from the detected data in a generator 52. The reference signal and the corrected signal are used to estimate parameters in a fine parameter estimation unit 23.

REFERENCES:
patent: 5187719 (1993-02-01), Birgenheier et al.
patent: 5206886 (1993-04-01), Bingham
patent: 5590158 (1996-12-01), Yamaguchi et al.
patent: 5732105 (1998-03-01), Andren et al.
Proakis, J.G., Digital Communications. New York: McGraw-Hill Book Company, pp. 333-334, 1989.

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