SAR echo base-band signal produce module is the key unit of the SAR echo signal simulator, its design affects the performance of the SAR echo signal simulator.

SAR目标回波基带信号产生模块是SAR目标回波模拟器的关键单元之一，其设计影响到模拟器系统的性能。

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Based on the principle of digital orthogonal modulation, the generation question of wide-band signal is factually identical with how to generate base-band signal with high sampling in time domain.

在数字正交调制原理的基础上，宽带信号的产生问题实际上转换为如何得到高采样率下的时域基带信号。

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When processing digital base-band, the signal of pilot-frequency was taken out from normal carrier channel and it would be used for transmitting pseudo pilot-frequency.

在数字基带处理时，从正常载频信道中提取出导频信号，用于伪导频的发射。

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For example you might have Texas Instrument or TI which is the biggest supplier in the base-band market or DSP (Digital Signal Processing) but still have competition from the likes of Lucent, Motorola, Qualcomm.

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