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Implementation of a software defined ultra-wideband impulse radio receiver

机译:实现软件定义的超宽带脉冲无线电接收器

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摘要

An implementation of a Software Defined Radio (SDR) Ultra-Wideband (UWB) Impulse Receiver is presented. The developed impulse receiver has been designed in order to be integrated in a Software Defined Impulse Radio (IR) Transceiver already implemented keeping the same quality rates. The transceiver, where the receiver must be integrated, is implemented using Matlab language. Using Matlab language makes the execution time of the software slow. The new receiver implementation is carried out in C language in order to speed up the simulation. The speed increase of the simulation will offer a better performance for future different real time applications. The method used for interact between Matlab and C language is a mex-function. The mexfunction allows calling a C function from Matlab and transferring the data from Matlab to C and vice versa. The data is not transferred using files but they are transfixed as parameters using the memory. This practice allows speeding up even more the simulation. The receiver prototype is characterized by being designed to work at a radio RF range of 2-3 GHz, as the transceiver. The impulse shape used to transmit the information exhibits a Gaussian shape and it has a -10 dB bandwidth of at least 500 MHz, as is required by UWB systems. The pulse repetition frequency established can oscillate between fsym = 0.5 ... 62.5 MHz. The impulses shapes are modulated using a Binary-/Quadrature Phase-Shift Keying (B/-QPSK). The receiver is also designed employing bandpass (BP) sampling. The demodulation process is achieved using a matched filter and finally a maximum likelihood decision provides the digital received symbols. Some measurements of the computational time needed to carry out the simulation for different data length are taken. They show that the solution proposed improves significantly the computational time, keeping the quality rates.
机译:提出了软件定义无线电(SDR)超宽带(UWB)脉冲接收器的实现。已开发的脉冲接收器经过设计,可以集成到已经实施的软件定义脉冲无线电(IR)收发器中,以保持相同的质量率。使用Matlab语言实现必须集成接收器的收发器。使用Matlab语言会使软件的执行时间变慢。新的接收器实现是用C语言执行的,以加快仿真速度。仿真速度的提高将为未来的不同实时应用提供更好的性能。 Matlab和C语言之间进行交互的方法是mex函数。 mexfunction允许从Matlab调用C函数并将数据从Matlab传输到C,反之亦然。数据不是使用文件传输的,而是使用存储器作为参数传输的。这种做法可以加快仿真速度。接收器原型的特点是被设计为作为收发器在2-3 GHz的射频范围内工作。超宽带系统要求,用于传输信息的脉冲形状呈现高斯形状,并且具有至少500 MHz的-10 dB带宽。所建立的脉冲重复频率可以在fsym = 0.5 ... 62.5 MHz之间振荡。脉冲形状使用二进制/正交相移键控(B / -QPSK)进行调制。接收机还设计为采用带通(BP)采样。使用匹配滤波器实现解调过程,最后最大似然判决提供数字接收符号。对不同数据长度进行仿真所需的计算时间进行了一些测量。他们表明,所提出的解决方案显着改善了计算时间,并保持了质量率。

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