MF
Detector/Generator
by DNA Enterprises, Inc.

Software Overview

DNA Enterprises' MF Detection/Generation package implements a multi-channel MF generator and 
receiver. The number of channels is configurable at compile time and each transmit channel is 
individually configurable. This package is developed for the TMS320C3x digital signal processor.  
MF signals are generated and detected as specified by ITU-T Recommendations Q.153 and Q.154.
The software's modular design separates signal detection and generation issues from data I/O and 
command I/O issues. This allows the MF software to "bolt" into custom hardware platforms. Data 
memory requirements for this algorithm are based on the number of channels configured. Less data 
memory is used if fewer channels are required.

Features and Benefits

•	Simultaneously generates and detects MF on up to 24 channels 
•	Modular design allows custom I/O development
•	Transmits/receives tones according to ITU-T Recommendations Q.153, Q.154
•	Number of channels is configurable
•	Supports stack or register parameter passing

Processor and System Requirements

Target processor:
TMS320C3x DSP
Algorithm category:
Telecommunications
Program memory usage:
565 words
Data memory usage:
1030 words (based on 24 channels)
Transmitter processor loading:
0.14 MIPS (per channel)
Receiver processor loading: 
0.44 MIPS (per channel)
Data coding format:
13-bit linear PCM at 8 kHz

Algorithm Verification

DNA Enterprises' MF algorithm was validated on a third-party PC plug-in board using a 33-MHz 
TMS320C3x according to  ITU-T Recommendations Q.153 and Q.154.  The following receiver tests were 
included in the test suite:
•	Signal recognition - digit and control signals, expanded in-band signals
•	Bridge signal interruptions - digit and control signals, expanded in-band signals
•	Receive 2500 10-digit calls
•	Signal rejection due to low levels
•	Signal rejection due to short signal durations
•	Signal rejection due to interfering tones

Availability

•	Available now on the TMS320C3x DSP
•	Licensable in object or source-code format

DNA Enterprises offers consulting services to tailor the MF Detector/Generator software package to 
your specific needs.  This includes porting the algorithm to another Texas Instruments DSP.

Company Background and Contact Information

DNA Enterprises Inc. specializes in telecommunication and real-time multiprocessor embedded 
systems.  We provide turnkey design and development, offering software, hardware, and digital 
signal processing expertise for all project phases.

Contact:	Mr. Brian Berger
		269 West Renner Parkway
		Richardson, Texas  75080
		(214) 644-3301
		Fax: (214) 644-6338
		e-mail: info@dna.metronet.com