Peak clipping circuit provided in a quadrature modulator and a m

Details Peak clipping circuit provided in a quadrature modulator and a m Peak clipping circuit provided in a quadrature modulator and a m

1998-04-20

2000-03-28

Bocure, Tesfaldet

Pulse or digital communications

Transmitters

375298, 375308, H04L 2704, H04L 2720

Patent

active

060441178

ABSTRACT:
In order to clip the levels of an incoming in-phase and quadrature signals, a comparator receives the in-phase signal, a clipping level, and an inverted clipping level. The comparator compares the level of the in-phase signal with each of the clipping level and the inverted clipping level, and generates a comparison result. A selector, in response to the comparison result, allows the in-phase signal to pass therethrough when the level of the in-phase signal exceeds the inverted clipping level and less than the clipping level, selecting the inverted clipping level when the level of the in-phase signal is less than the inverted clipping level, and selecting the clipping level when the level of the in-phase signal exceeds the clipping level. On the other hand, the level of the quadrature signal is limited using another comparator and selector in exactly the same manner as mentioned above.

REFERENCES:
patent: 5751774 (1998-05-01), Wang
patent: 5818875 (1998-10-01), Suzuki et al.

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