The Pluto Radio and Xilinx®Zynq®- Communicat万博1manbetxions Toolbox™的基于基于的无线电支持软件包可用于使用软件定义的无线电(SDR)硬件反复将任意信号传输到空中。使用简单使用的MATLAB®接口,任何信号都可以生成并下载到SDR硬件上,从空中反复传输。同时,可以接收信号并易于可视化,因此在接收的信号上可见通道效应。首先,使用WLAN Toolbox™的几行MATLAB代码来生成完全符合标准的WLAN信号信号。SDR硬件很容易使用简单的MATLAB对象配置,并将生成的信号加载到连接的SDR硬件上。然后将信号反复传输到空中。在扫描WiFi网络时,它显示了信标信号在笔记本电脑显示屏上的出现。并行,模拟万博1manbetx®is used to show how the spectrum of the transmitted signal can be viewed in real time. Next, a fully custom OFDM waveform is generated using the Communications Toolbox Waveform Generation App. Some null pilot signals are easily inserted to give the spectrum a distinctive shape before the signal is again loaded onto the attached SDR hardware and transmitted onto the air. The spectrum analysis setup from before is used in parallel to see the OFDM signal
This video shows you how to generate and transmit standards-compliant and custom waveforms using MathWorks toolboxes and SDR connectivity. First, I will show you how to use WLAN Toolbox to generate and transmit an 802.11 beacon signal. Then I will show you how to use the Waveform Generator app to generate and transmit a fully custom OFDM waveform.
Let’s start by opening a simple Simulink model that we will use to display the real-time received spectrum. Note that this spectrum display can also easily be achieved in MATLAB. Looking at the receiver block parameters, I will configure the SDR device to sample at a sampling rate of 40MHz at a center frequency of 5.3GHz. Simply clicking play on this model will start the reception of samples from my attached hardware and display the spectrum analyzer. You can see some form of signal being transmitted 15MHz below my center frequency.
Returning to the MATLAB prompt, I will now generate my WLAN waveform with a prewritten script which is built on WLAN Toolbox functionality. The script returns a waveform sampled at 20MHz and configured to transmit at 5.3GHz. Next, I create the transmitter object I will use to configure the SDR device and transmit my waveform. I simply set the minimum set of parameters; namely, sampling rate, center frequency, and gain. Next, I resample my waveform to match my receiver sampling rate of 40MHz and call a single method on my transmitter object, which will download the waveform to my SDR device and transmit it repeatedly onto the air. You can see the sporadic beacon signals being transmitted, and, zooming in on the access point list on my laptop, you can see the TEST BEACON that has been transmitted. In a matter of a couple of minutes, I have generated and transmitted a fully standard-compliant WLAN waveform onto the air.
接下来,我将生成并传输自定义OFDM波形。为此,我将使用波形生成器应用程序,该应用使您可以生成,损害,可视化和导出调制波形,包括OFDM,QAM,PSK和WLAN。要打开该应用程序,请在MATLAB工具条上浏览可用的应用程序,然后选择无线波形生成器。在波形应用程序中,您可以看到我已经使用了一些零值飞行员的OFDM信号,在频谱中给出了一个缺口。我可以生成波形并将其导出到MATLAB工作区。看着波形,我可以看到它已在16MHz处进行采样。同样,我将生成的波形重新采样到样品速率,将硬件配置为使用一条代码行,将其配置为使用并将其传输到空中。同样,我们在接收到的频谱中看到了我们使用波形生成器应用程序生成的清晰档位。
The functionality I have shown here is available in two different support packages for Xilinx Zynq-Based Radio hardware and Analog Devices Pluto Radio hardware. The support packages are free downloads based on Communications Toolbox. To find these support packages, you can search for “matlab sdr” in your favorite search engine. The MATLAB and Simulink SDR page should be at or near the top. On the page you can find out more details on the support packages shown in this video, or some of our other SDR support.
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