关键词: Chirp信号, 语音噪声, 非平稳性, 线性预测, 消噪

Abstract: Chirp modem is a reliable and robust data transferring tool which is a combination of Chirp signal and digital modulate mode. However, the received Chirp signal always contains voice noise transmitted by broadcasting station in engineering practice of communication which severely restricts the application of Chirp signal. Due to the non-smooth character of voice noise, tradtional denoising method hardly works. This paper puts forward a voise noise denoising algorithm which is available to Chirp signal. This algorithm is applied to process the received Chirp-BPSK signal. The power of the voice noise on received signal is cut down. Resultingly, the performance of the communication system is improved. The results show that the algorithm has a good performance.

Key words: Chirp signal, voice noise, non-smooth, linear predictive coding, denoising