Harmonic Product Spectrum (HPS) algorithm for pitch detection.

Multicarrier communication techniques

在某些无线信道中，多普勒频移会引起无线信道输出信号的混叠的原因；无线信道中的多普勒谱有一种经典谱(classic spectrum)产生的机理；-In some wireless channel, the reason of Doppler frequency shift causing aliasing Doppler spectrum in the wireless channel, the mechanism of Gener

频谱感知中的能量感知算法，在不同虚警概率的情况下，信噪比和检测概率的变化。-In Cognitive Radio， spectru sensing is important。And energy detection is more. In different false alarm probability, the Pd vary with the SNR.