| 摘要 |
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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