测试和测量
生成波形并使用量化工具测量系统性能。使用星座图和眼图等图形实用工具可视化各种损伤和校正的效果。
处理捕获信号的受支持文件格式包括二进制基带信号和 NI™ 技术数据管理解决方案 (TDMS) 格式文件。您可以通过单独读取各个 TDMS 文件或同时读取 TDMS 文件集合来将数据读取到表或时间表中。
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主题
- Bit Error Rate Analysis Techniques
Obtain bit error rate results and statistics.
- Analyze Performance with Bit Error Rate Analysis App
Learn how to use the Bit Error Rate Analysis app.
- 使用 MATLAB 计算具有 AWGN 的 QAM 系统的 BER
Communications Toolbox™ 功能构建于 MATLAB® 计算和可视化工具之上，使您在仿真通信系统时能够使用更高级别的函数。本组示例说明如何计算由 AWGN 信道导致失真的 16-QAM 信号的误码率 (BER)。
- 步骤 1: 使用 MATLAB 检查 16-QAM
- 步骤 2: 对 16-QAM 信号使用脉冲整形
- 步骤 3: 对 16-QAM 信号使用前向纠错
- Create Waveforms Using Wireless Waveform Generator App
Create, impair, visualize, and export modulated waveforms.
- ACPR Measurements Using WCDMA Signal
This example shows you how to obtain adjacent channel power ratio (ACPR) measurements using a WCDMA communications signal, according to the 3GPP™ TS 125.104 standard [1].
- Measure Modulation Accuracy
Learn about EVM and MER for measuring modulation accuracy.
- Scatter Plots and Constellation Diagrams
Display digitally modulated signals in the IQ-plane.
- Visualize RF Impairments
Apply various RF impairments to a QAM signal.
- Plot Signal Constellations
Show reference constellation plots for 16-PSK modulation of Gray-coded and binary-coded symbol mapping by setting
PlotConstellation=truewhen using the modulation function. - VITA 49 Packet Format
Explore the signal data packet and context data packet format of VITA 49 file.
- Selected Bibliography for Measurements
List of references for further reading.
相关信息
精选示例
Link Budget Analysis
Demonstrate analyze link budgets in the design of wireless communications links between two sites considering issues of range, throughput, and received signal quality of critical importance to the system engineer.
Measure EVM for 802.15.4 (ZigBee) System
Measure EVM of simulated IEEE 802.15.4 transmitter.
Frequency Offset Calibration for Receivers
At the receiver, measure and calibrate to remove the frequency offset between a transmitter and a receiver.
Frequency Offset Calibration for Receivers in Simulink
Measure and calibrate for transmitter/receiver frequency offset at the receiver in a Simulink simulation.
Spectrum Analysis of Signals
Downstream spectrum analysis of signals using MATLAB, Communications Toolbox and DSP System Toolbox™.
Spectrum Analysis of Signals in Simulink
Use the captured signals, or receive signals in real time using RTL-SDR, ADALM-PLUTO or USRP™ radio, as a data source for downstream spectrum analysis with MATLAB and Simulink®.
VITA 49 File Reader
Read signal time data packets and the associated metadata (context packet data) from a VITA 49 format file.
