For WiMAX, the rate of data transmission speed up to 75 mega-bit signal. Per second (Mbps) using the mechanism to change the wave. High-performance signal can be sent out in the far distance of up to 30 miles or 48 kilometers under high frequency with high performance, it also has no problems with signal reflection. In addition, the base station (Base Station) can also consider the suitability between the speed and distance. For example, if using a technique in the QAM 64 (Amplitude Modulation Quadarature) unable to support effective communication have been changed to use 16 QAM or QPSK (Quadarature Phase Shift Key), which will help increase the distance the more communication.
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