摘要
研究一种基于循环移位的M进制正交扩频方案,在MSK调制方式下,提出两种有代表性的接收机模型,前者具有理论上的最佳性能,后者更具有实际意义;在AWGN信道下对两种接收机模型进行理论分析和仿真,仿真得到的误码率与公式推导的结果吻合;对两模型误码率的仿真比较表明,在相同误码率的情况下,模型一可以接收的最低信号功率比模型二低约2dB。
Aiming at a kind of m-ary orthogonal spread spectrum mechanism, two kinds of receivers based on MSK modulation were given, one of which had the best theoretical performance and the other had practical utility. Both receivers, especially the second, were analyzed and then simulated by COSSAP to get the bit error rate(BER) in AWGN channel, and two approaches get similar results. Comparison between two receivers?simulating results also shows that with the same BER, the minimum signal power that the former can receive is lower by about 2dB than that of the latter.
出处
《系统仿真学报》
CAS
CSCD
2003年第7期1002-1004,共3页
Journal of System Simulation
关键词
多进制正交扩频
MSK调制
解扩
仿真
m-ary orthogonal spread spectrum
MSK modulation
dispreading
simulation
