The out of band noises of Eureka 147 DAB (digital audio broadcasting) signals produced by HPA (high power amplifier) nonlinearities were analyzed to reduce the interference to adjacent channels.

• 为更好地抑制带外噪声 ,减小信道间的干扰 ,在对Eureka 147DAB(数字音频广播 )信号调制过程进行介绍后 ,从频谱扩展的角度分析了 HPA (高功率放大器 )对 DAB信号的影响。