android signal 信号处理,信号处理 Signal Processing

摘要：

数字发送子系统包括将基带软件无线电级的同相和正交信道作为其输入的DSP(100). Send subsystem includes digital baseband software radio stage phase and quadrature channel as its input DSP (100). 同相和正交输入分别被数字化地预失真(110,120)并数字化地上变频成中频(IF)频带(128). Phase and quadrature inputs respectively digitally predistortion (110, 120) and the ground digitized intermediate frequency (IF) band (128). IF频带信号接着转换成模拟信号(130),该模拟信号在(140)进行放大之前在(134)被上变频成射频频带,以产生用于从天线发射的RF输出信号. IF-band signal is then converted into an analog signal (130), the analog signals prior to (140) to zoom in (134) is up-converted into a radio frequency band, is used to generate an RF output signal transmitted from the antenna. 预失真器(110和120)为了线性化RF输出,在发送子系统内预失真输入信号以抵消由上变频和放大处理产生的失真. Predistortion (110 and 120) to the RF output linearization, pre-distortion in the transmission subsystem to offset the distortion of the input signal by the up-conversion and amplification process generated. 预失真器(110,120)可以利用从位于子系统输出的分离器(142)提供给DSP(100)的反馈信号进行自适应调节. Predistortion (110, 120) can use the output from the splitter located subsystem (142) to the DSP (100) adaptive feedback signal. 反馈装置可以包括模拟相关处理,以允许使用用于向DSP(100)提供反馈的较慢的模拟-数字转换器(图4和图5). Feedback means may comprise analog correlation process, to allow the use of the DSP (100) providing feedback for slower analog - digital converter (FIG. 4 and FIG. 5).

展开