System for MPSK symbol hypothesis testing

Details System for MPSK symbol hypothesis testing System for MPSK symbol hypothesis testing

2005-07-26

2005-07-26

Liu, Shuwang (Department: 2634)

Pulse or digital communications

Testing

C375S329000, C375S279000, C370S215000

Reexamination Certificate

active

06922438

ABSTRACT:
A system for MPSK symbol hypothesis testing. A received symbol having in-phase (I) and quadrature (Q) components is input to the system. Multipliers for each of the components are determined corresponding to the MPSK symbol hypothesis s being tested. The symbol s is a quadrature symbol having in-phase and quadrature components, sIand sQ, respectively. The multipliers are each derived from fractions which approximate to a desired level of resolution either ±sIor ±sQ. The system multiplies the I and Q components by their respective multipliers through a discrete series of add, shift, and twos complement operations. It then derives a metric for testing the hypothesis from the resulting products.

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