基于并串转换的多通道高速伪随机序列发生器

Multichannel high-speed pseudo-random sequence generator based parallel/serial converter

研制了一款通用的多通道高速伪随机序列发生器。该发生器基于FPGA利用并串转换和时钟树技术实现,包含4个并行的通道,跳变速率智能可调,且伪随机序列有多种选择,可以为m序列、伯努利序列等等。同时对高速信号进行了信号完整性仿真,经测试,设计的高速伪随机序列发生器生成的伪随机序列波形和仿真结果相吻合,正负取值的幅度误差小于100bmV,最小脉冲宽度为0.5ns,跳变速率可达2Gbps。该伪随机序列发生器可作为混频信号用于调制宽带转换器系统中,也可用于通信、雷达、超声波测距等领域。

A multichannel high-speed pseudo-random sequence generator with common use has been developed.This generator is achieved by parallel/serial and clock tree based on FPGA,includes 4parallel channels.The alternating frequency can be changed online.There are several choices for the pseudo-random sequence,such as m sequence,Bernoulli sequence or others.Signal integrity simulation for high-speed signals has been executed.Hardware tests validate that the experimental results and simulation results are consistent,the positive and negative margin of error is less than 100 mV,the minimum pulse width is 0.5ns,and the transition frequency of the designed high-speed pseudorandom sequence generator can reach 2 Gbps.This high-speed pseudo-random sequence generator can be used in modulated wideband convertor as a mixer function,and can also be used in communication or radar,ultrasonic ranging domain.