中文说明：
采用16QAM调制方式对一串二进制信息进行基带调制，并分析其功率谱，在AWGN信道上进行传输，并解调，最后对其误比特（BER）性能加以分析。
English Description：
A string of binary information is baseband modulated by 16QAM modulation, and its power spectrum is analyzed. It is transmitted and demodulated on AWGN channel. Finally, its bit error (BER) performance is analyzed