Method and system for implementing a baseband compression...

Details Method and system for implementing a baseband compression... Method and system for implementing a baseband compression...

2007-10-30

2007-10-30

Ho, Duc (Department: 2616)

Multiplex communications

Generalized orthogonal or special mathematical techniques

Plural diverse modulation techniques

C370S316000, C375S316000

Reexamination Certificate

active

10269741

ABSTRACT:
A system for implementing a base band compression scheme for a nonlinear multiplying up-converter for QPSK and OQPSK includes a bit combining module, a quadrant remap module, a look-up table (LUT) and a zoom adjust module. The bit combining module is configured to generate an address based on a number of symbols received as input data. Using the address provided by the bit combining module, the quadrant remap module remaps symbols from quadrants “2”, “3” and “4” to quadrant “1” and generates signals to look up corresponding output data from the LUT. The zoom adjust module generates a number of solutions corresponding to the input data using the corresponding output data retrieved from the LUT. The zoom adjust module is then used to select the best output from the solutions to provide a smooth output signal that does not have any discontinuities.

REFERENCES:
patent: 4404532 (1983-09-01), Welti
patent: 5130803 (1992-07-01), Kurita et al.
patent: 6047023 (2000-04-01), Arnstein
patent: 6466832 (2002-10-01), Zuqert et al.

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