一种任意符号速率频分多路信号单通道DAC发射结构  

Arbitrary Symbol Rate Frequency Division Multiplexing Signal Generation by Single DAC Channel

作　　者：王大海[1] 彭华[1] 李天昀[1] 

机构地区：[1]信息工程大学,河南郑州450001

出　　处：《信息工程大学学报》2015年第6期701-705,共5页Journal of Information Engineering University

摘　　要：传统的不同符号速率频分多路信号发射结构需要多个DAC通道,硬件资源浪费严重,提出一种任意符号速率频分多路信号单通道DAC发射结构。该结构基于固定采样率任意符号速率基带信号产生算法,只需一个DAC通道便可实现多路不同符号速率信号同时发射,代价仅是生成信号信噪比的微小损失,大大节省了各类资源。该结构具有很强的通用性,并且实现简单,资源消耗少,并行性好,尤其适合在FPGA中实现。Traditional transmitter structure of different symbol rate frequency division multiplexing signal needs more than one DAC channel. It leads to a serious waste of hardware resources. Based on the algorithm of arbitrary symbol rate baseband signal generation in the condition of fixed sampling rate,this paper presents a single DAC channel transmitter structure for arbitrary symbol rate frequency division multiplexing signal generation. This architecture can generate multiplex signal having different symbol rates only by one DAC channel and save lots of resources at the cost of a slight SNR loss. It is general,simple and well parallel to be implemented on FPGA.

关 键 词：软件无线电发射机 频分多路 平方根升余弦滤波器 数模转换器 

分 类 号：TN911.22[电子电信—通信与信息系统]