Method for digital wireless communications

Details Method for digital wireless communications Method for digital wireless communications

2007-07-31

2009-02-17

Ghayour, Mohammad H (Department: 2611)

Pulse or digital communications

Transmitters

Quadrature amplitude modulation

C375S261000, C370S335000

Reexamination Certificate

active

07492833

ABSTRACT:
In a multivalue modulation type with one pilot symbol inserted for every 3 or more symbols, signal points of each one symbol immediately before and after a pilot symbol are modulated using a modulation type different from that for pilot symbols. In this way, it is possible to suppress deterioration of the accuracy in estimating the reference phase and amount of frequency offset by pilot symbols and improve the bit error rate characteristic in the signal to noise ratio in quasi-coherent detection with symbols whose symbol synchronization is not completely established.

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