高斯噪声信道下CCK性能分析的新方法

A New Approach to Analyzing CCK Performance under AWGN Channel

为分析高斯噪声信道下补码键控(CCK)的性能,在总结CCK及M元双正交键控(MBOK)编码调制特点基础上,提出了M元四正交键控(MQOK)思想,给出了MQOK编码调制及相关解调原理图,分析了MQOK相对于MBOK具有解调结构简单、更适合高速数据传输等优点,并指出CCK编码调制是MQOK的一种具体实现方式。详细推导了高斯噪声信道下MQOK的基带性能公式,结合CCK编码特点,得到了CCK的性能公式。最后对比理论曲线与Monte Carlo仿真曲线,在确定的误符号率或误比特率条件下,理论结果与仿真结果所需的信噪比(SNR)相差不到0.5 dB,验证了基于MQOK分析CCK性能方法的可行性及其性能公式的简洁有效性。

In order to analyze Complementary Code Keying （CCK） performance on the additive white Gaussian noise （AWGN） channel, an idea of M - ary Quaternary Orthogonal Keying modulation （MQOK） is proposed in this paper, based on the analysis of the common traits of CCK and M - ary Bi - orthogonal Keying （MBOK）. Again this paper analyzes that MQOK has the merits of simpler demodulation structure and more adaptable to higher data transfer than MBOK and points out that CCK coding modulation is considered a concrete way to realize MQOK. By analyzing the performanee of MQOK on AWGN channel in detail, new closed - form formulae for CCK are gained with its own modulation feature. Comparison between the numerical result and the simulation result of Monte Carlo shows that the difference of the required signal - to - noise （SNR） between the numerical and simulation is less than 0.5 dB with any certain bit - error probability and symbol - error probability, which confirms that these formulae are more accurate and practical, and the approach to analyzing CCK performance by MQOK is available.