DC compensation in direct conversion radio receivers

Details DC compensation in direct conversion radio receivers DC compensation in direct conversion radio receivers

2001-08-03

2008-09-16

Wang, Ted (Department: 2611)

Pulse or digital communications

Receivers

Automatic baseline or threshold adjustment

C375S324000, C375S340000, C375S350000

Reexamination Certificate

active

07426245

ABSTRACT:
A direct conversion receiver uses an algorithm implemented by a DSP to cancel residual DC offsets during demodulation of a GMSK modulated signal. The algorithm exploits the characteristics of GMSK modulation by determining the. modulation extremes within sampled I/Q signals and calculates the DC offset as the mean of the extremes. This offset is used to weight a declining exponential function which is subtracted from the original signal samples to achieve compensation.

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