The traditional differential space-time block code (DSTBC) suffers from the signalconstellation expansion for QPSK modulation.
传统的差分空时分组编码(DSTBC)在QPSK调制时存在着信号星座扩展。
2
The shaping of a signalconstellation by selecting the boundary of the signal set is used to reduce the average energy of the constellation.
由选定信号集边界的信号星座成形用于降低该星座的平均能量。
3
After the unequal error protection of multilevel coded modulation is discussed in detail, a non-uniform signalconstellation applied to 8ask modulation is designed.