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本文主要对导频单边带中的透明带内导频(TTIB)技术进行了研究,分析了TTIB方案中的滤波器特性及搬移频率ω_T、ω_R对传话音和BPSK信号的影响,推出了ω_T、ω_R与BPSK信号相干解调的误码率的关系,结果表明ω_T、ω_R的准确性对BPSK信号相干解调影响非常大。为了克服这个问题提出了透明带内双导频(DTTIB)方案,对TTIB和DTTIB进行了基带传话音和BPSK信号实验。另外,本文的附录中对TTIB的噪声问题进行了讨论。
In this paper, we mainly study the transparent band-in-band pilot (TTIB) technique in pilot single-sideband and analyze the influence of filter characteristics and moving frequency ω_T, ω_R on the transmitted speech and BPSK signal in TTIB scheme. , Ω_R and BPSK signal coherent demodulation bit error rate, the results show that the accuracy of ω_T, ω_R BPSK signal coherent demodulation greatly affected. In order to overcome this problem, a transparent double band pilot (DTTIB) scheme is proposed, and baseband transmission speech and BPSK signal experiments are performed on TTIB and DTTIB. In addition, the issue of TTIB noise is discussed in the appendix of this article.