Telecommunications – Transmitter and receiver at separate stations – Having measuring – testing – or monitoring of system or part
Reexamination Certificate
2006-10-31
2006-10-31
Milord, Marceau (Department: 2618)
Telecommunications
Transmitter and receiver at separate stations
Having measuring, testing, or monitoring of system or part
C455S069000, C455S522000, C455S067130, C455S063100, C370S335000, C370S342000, C375S265000, C375S242000, C375S261000, C375S308000
Reexamination Certificate
active
07130587
ABSTRACT:
An average signal point amplitude detection section15A determines an average position of I and Q components when a received QPSK modulated signal is demodulated and a threshold calculation section15B determines threshold ths on an IQ plane based on the average signal point position of the received QPSK modulated signal and a theoretical distribution position on the IQ plane of signal points of a 16-value QAM signal. Then, a threshold decision section14A makes a threshold-decision on the I and Q components of sequentially received QPSK modulated signals using this threshold ths and thereby calculates a simulated bit error rate of the 16-value QAM signal.
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Abe Katsuaki
Hikokubo Tsuneo
Murakami Yutaka
Takabayashi Shinichiro
Greenblum & Bernstein, p.l.c.
Milord Marceau
National Institute of Information and Communications Technology
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