Communication quality estimation method. communication quality estimation apparatus and communication system
当解调接收QPSK调制信号时，平均信号点幅度检测部分15A确定I和Q分量的平均位置，阈值计算部分15B根据接收QPSK调制信号的平均信号点位置和16-值QAM信号的信号点在IQ平面上的理论分布位置，确定IQ平面上的阈值ths。然后，阈值判决部分14A利用这个阈值，对依次接收QPSK调制信号的I和Q分量作出阈值判决，从而，计算出16-值QAM信号的模拟位错率。 An average signal point amplitude detection section 15A determines an average position of I and Q components when a rec...
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| Sprache: | chi ; eng |
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| Zusammenfassung: | 当解调接收QPSK调制信号时，平均信号点幅度检测部分15A确定I和Q分量的平均位置，阈值计算部分15B根据接收QPSK调制信号的平均信号点位置和16-值QAM信号的信号点在IQ平面上的理论分布位置，确定IQ平面上的阈值ths。然后，阈值判决部分14A利用这个阈值，对依次接收QPSK调制信号的I和Q分量作出阈值判决，从而，计算出16-值QAM信号的模拟位错率。
An average signal point amplitude detection section 15A determines an average position of I and Q components when a received QPSK modulated signal is demodulated and a threshold calculation section 15B 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 section 14A 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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