摘要
如何提高抗窄带干扰能力成了MB-OFDM UWB系统应用中必须解决的一个问题,在发送端采用扩展编码可以解决这一难题,但是目前对扩展编码的最优值并未有深入研究。首先介绍了MB-OFDM UWB系统的工作原理和Hadamard编码的特性,将Hadamard编码同MB-OFDM UWB系统相结合,研究了系统抗窄带干扰的性能,对Hadamard编码中M去何值时系统具有更好的抗干扰性能进行了深入的研究,提出了自己的见解,并结合卷积码进行了比较,通过仿真得到较合理的编码方案。
How to increase the anti - uarrowband interference capability is a problem to be solved in MB - OFDbl UWB system . It can be solved by using spreading code. The article introduces the principle of MB - OFDM UWB system and the characteristic of Hadamard code. Hadamard code is combined with MB - OFDM UWB system, which is studied under the narrow - band interference. It is deeply studied which value is selected for M to make the system have a better performance. Some conlusions are given. Finally a reasonable coding means is got by comparing with convolutional code.
出处
《计算机仿真》
CSCD
北大核心
2009年第1期142-145,共4页
Computer Simulation
基金
国家自然科学基金(60432040)
