应用

DTMF Generator and Receiver

Model a dual-tone multifrequency (DTMF) generator and receiver. The example includes a preconfigured model that has a bandpass filter bank receiver, a spectrum analyzer block displaying a spectrum and spectrogram plot of the generated tones, a shift register to store the decoded digits, and a real-time soundcard audio on all platforms.

WWV Digital Receiver - Synchronization and Detection

An implementation of a digital receiver that synchronizes to the time code information broadcast by radio station WWV and decodes it to display time information. The example uses the Simulink®, DSP System Toolbox™, and Stateflow® products with the MATLAB® Function block to achieve a simple noncoherent digital receiver.

Internet Low Bitrate Codec (iLBC) for VoIP

Implements the Internet Low Bitrate Codec (iLBC) and illustrates its use. iLBC is designed for encoding and decoding speech for transmission via VoIP (Voice Over Internet Protocol).

Digital Up and Down Conversion for Family Radio Service in MATLAB

Family Radio Service (FRS) is an improved walkie talkie FM radio system authorized in the United States since 1996. This personal radio service uses channelized frequencies in the ultra high frequency (UHF) band. Devices operating in the FRS band must be authorized under Part 95 Subpart B "Family Radio Service" (Sections 95.191 through 95.194) of the FCC rules. The authorized bandwidth of FRS channels is 12.5 KHz and the center frequency separation between channels is 25 KHz.

Digital Up and Down Conversion for Family Radio Service in Simulink

Implement Family Radio Service system using Digital Down-Converter and Digital Up-Converter blocks.

Envelope Detection in MATLAB

Implement two common methods of envelope detection. One method uses squaring and lowpass filtering. The other uses the Hilbert transform. For a similar example in Simulink™, see Envelope Detection in Simulink.

Envelope Detection in Simulink

Envelope detection in Simulink^® using the squaring and lowpass filtering method and the Hilbert transform method.

Real-Time ECG QRS Detection

Detect the QRS complex of an electrocardiogram (ECG) signal in real time. The example uses Model-Based design to develop, test, deploy the algorithm.

Interference Mitigation Using Frequency Agility Techniques

Model frequency agility techniques to counter the effects of interference in radar, communications, and EW systems.

(Radar Toolbox)