16-QAM Modulation REF LVL –8dBm 1.2 CF 42MHz MEAS SIGNAL SR 1.28MHz CONSTELLATION DEMOD 16QAM –1.2 –1.5 REAL Figure 17. QPSK Modulation 1.5 –1.2 –1.5 REAL Figure 19. 16-QAM Modulation 1.5 –10– REV. C AD9853 95 0.80 BIT RATE >2Mb/s CLK = 122.88 MHz 85 VCC = +5V 0.75 ...
FIG. 1 is a block diagram of an embodiment of the present invention; FIG. 2 is a constellation showing outputs of a differential detector when no delay spread is present; FIG. 3 is a constellation showing exemplary outputs of the differential detector when a delay spread is present; ...
(a) Ideal constellation diagram; (b) Actual received signal Sequence description. As illustrated in Figure 4, the QPSK-TMS signal is obtained after processing the TMS signals through QPSK partitioning. Consequently, adjacent QPSK-TMS signals may be discontinuous, with time intervals present. Here,...
(a) Ideal constellation diagram; (b) Actual received signal Sequence description. As illustrated in Figure 4, the QPSK-TMS signal is obtained after processing the TMS signals through QPSK partitioning. Consequently, adjacent QPSK-TMS signals may be discontinuous, with time intervals present. Here,...