大视场TDICCD空间相机全通道高可靠快视系统

提出了一种适于大视场时间延迟积分电荷耦合器件（TDICCD）空间相机的全通道高可靠快视系统。首先,建立TDICCD图像滚屏显示模型,能够有效模拟TDICCD相机线阵输出的推扫过程,进而提出基于硬件的行频自适应实时滚屏显示方法;然后,针对高速图像数据缓存不可靠问题,提出易于硬件实现的（16,16）纠错编码算法;最后,在某空间相机原理样机上进行了测试。结果表明,本系统的行频自适应范围为0.52~7.68kHz,可对数据率高达13.02Gbit/s的80通道12bit量化图像进行实时滚屏拼接显示与缩略显示,图像细节表现能力强;加入（16,16）纠错编码算法的SRAM缓存在1 024Byte内可纠正82bit错误,提高了图像缓存的可靠性。系统工作稳定,可移植性强,已成功应用于大视场TDICCD空间相机的研制与检测中。

A new method of waveform digitization based on time-interleaved A/D conversion

Time interleaved analog-to-digital conversion （TIADC） based on parallelism is an effective way to meet the requirement of the ultra-fast waveform digitizer beyond Gsps. Different methods to correct the mismatch errors among different analog-to-digital conversion channels have been developed previously. To overcome the speed limi- tation in hardware design and to implement the mismatch correction algorithm in real time, this paper proposes a fully parallel correction algorithm. A 12-bit l-Gsps waveform digitizer with ENOB around 10.5 bit from 5 MHz to 200 MHz is implemented based on the real-time correction algorithm.