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Convert Radio-Waves to Alert Using SDR, AWS Lambda and Amazon Transcribe API

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Convert Radio-Waves to Alert Using SDR, AWS Lambda and Amazon Transcribe API AEGAEUM JOURNAL ISSN NO: 0776-3808 Convert Radio-waves to alert using SDR, AWS Lambda and Amazon Transcribe API Ark Vrajlal Balar & Dr. Kamaljit I. Lakhtaria Department of Computer Science, Rollwala Computer Center, Gujarat University Abstract- Communication is essential and the major aspect Conversations and commands conveyed over the radio nowadays. The most used and authentic communication method link could be transcripted, it would be an add-on is radio communication. Conversations and commands conveyed advantage for its users. over the radio link can be transcripted, so that the receiver can 2. Linux, is a family of open source Unix-like operating have a log of the conversation. From the generated transcript systems based on the Linux kernel, an operating system conversations are read again to find if any significant words or kernel first released on September 17, 1991, by Linus commands are conveyed. If specific commands are conveyed; it Torvalds. Linux is typically packaged in a Linux can be used for creating an alert or for logging. distribution.A common feature of Unix-like systems, Linux includes traditional specific-purpose Index Terms- Radio, radio communication, sdr, aws, programming languages targeted at scripting, text transcription, reading, alert. processing and system configuration and management in general. Linux distributions support shell script. A scripting or script language is a programming I. INTRODUCTION language for a special run-time environment that Communication is the important aspect nowadays. automates the execution of tasks; the tasks could Communication takes place in everything, everywhere. The most alternatively be executed one-by-one by a human used and authentic communication method is radio operator. Primitives are usually the elementary tasks or communication. Radio communication is mostly used in defence API calls, and the language allows them to be combined and plays a game changing role in it. into more programs. Environments that can be Close communication between the data analysts and data automated through scripting include software producers will be a necessary and integral nexus if optimal applications, web pages within a web browser, usage of clinical benefit is to be achieved. the shells of operating systems (OS), embedded 1. Amateur radio, also known as ham radio, is the use of systems, as well as numerous games. A scripting radio frequency spectrum for purposes of exchange of language can be viewed as a domain-specific language messages, wireless experimentation, self-training, for a particular environment; in the case of scripting an private recreation, radio sport, contesting, and application, it is also known as an extension language. emergency communication. Scripting languages are also sometimes referred to as SDR - Software Defined Radio, solutions are beneficial very high-level programming languages, as they operate in the military sector, where communication systems at a high level of abstraction, or as control languages, need to have a longer service life time than in the particularly for job control languages on mainframes. commercial sector, SDR helps to protect investments by 3. Amazon Web Services (AWS) is a subsidiary of prolonging the useful service life of communication Amazon that provides on-demand cloud computing systems. platforms and APIs to individuals, companies, and A major motivation within the commercial governments, on a metered pay-as-you-go basis. In communications arena is the rapid evolvement of aggregate, these cloud computing web services provide communications standards, making software upgrades a set of primitive abstract technical infrastructure and of base stations a more attractive solution than the distributed computing building blocks and tools. It costly replacement of base stations. Common for both comprises of many services, few of them are: the military and the commercial sector, is that SDR opens up a range of possibilities by making existing A. Amazon S3 types of radio applications easier to implement, and by B. AWS Lambda allowing new types of applications. C. Amazon Transcribe D. Amazon SNS E. Amazon CloudWatch Volume 8, Issue 7, 2020 http://aegaeum.com/ Page No: 546 AEGAEUM JOURNAL ISSN NO: 0776-3808 A. Amazon S3 or Amazon Simple Storage Service is a or sending of messages to subscribing endpoints or service offered by Amazon Web Services (AWS) that clients. In Amazon SNS, there are two types of provides object storage through a web service interface. clients—publishers and subscribers—also referred to as B. AWS Lambda is an event-driven, serverless computing producers and consumers. platform provided by Amazon as a part of Amazon Web E. Amazon CloudWatch monitors your Amazon Web Services. It is a computing service that runs code in Services (AWS) resources and the applications you run response to events and automatically manages the on AWS in real time. You can use CloudWatch to computing resources required by that code. collect and track metrics, which are variables you can C. Amazon Transcribe uses advanced machine learning measure for your resources and applications. technologies to recognize speech in audio files and This study is a part of an attempt to upgrade the communication transcribe them into text. You can use Amazon systems integrating Linux and Amazon Web Services(AWS). Transcribe to convert audio to text and to create applications that incorporate the content of audio files. D. Amazon Simple Notification Service (Amazon SNS) is a web service that coordinates and manages the delivery II. RESEARCH FLOW A radio station is usually equipped with all radio communication equipment for good reception. SDR is a good option for reception and for recording purposes. SDR options available for the purpose are as follows: 1. SDR# 2. HDSDR 3. SDR-RADIO.COM V2/V3 4. Linrad 5. GQRX 6. CubicSDR 7. Studio1 Image-1: SDR scanner tool - GQRX 8. SDRUno 9. SigDigger A. SDR scanner tool - GQRX 10. ShinySDR GQRX is an open source software defined radio receiver (SDR) 11. WebRadio powered by the GNU radio and the Qt graphical toolkit. GQRX 12. OpenWebRX supports many of the SDR hardware available, including Airspy, 13. Sodira Funcube Dongles, rtl-sdr, HackRF and USRP devices. Here, 14. SDR Touch RTL-SDR 2832U DVB-T(Digital Video Broadcasting — 15. Wavesink Plus Terrestrial) USB dongle with monopole antenna is used for the 16. RFAnalyzer reception of radio signals. 17. cuSDR 18. PowerSDR 19. QtRadio 20. Multimode 21. Sdrangelove 22. kukuruku 23. ham2mon Here, the SDR scanner tool used is GQRX. Volume 8, Issue 7, 2020 http://aegaeum.com/ Page No: 547 AEGAEUM JOURNAL ISSN NO: 0776-3808 C. AWS Amazon Web Services is a subsidiary of Amazon that provides on-demand cloud computing platforms and APIs. AWS services and APIs used in this work are as follows: 1. Amazon S3 2. AWS Lambda 3. Amazon Transcribe API 4. Amazon SNS 5. Amazon CloudWatch 1. Amazon S3 stores data as objects within buckets. An object is a file and any optional metadata that describes the file. To store a file in Amazon S3, one uploads it to a bucket. 2. AWS Lambda can be used to run the code in response to events, such as changes to data in an Amazon S3 bucket and to run the code in response to HTTP requests using Amazon API Gateway. 3. Amazon Transcribe uses advanced machine learning technologies to recognize speech in audio files and transcribe them into text. You can use Amazon Transcribe to convert audio to text. The output from the Image-2: RTL-SDR 2832U DVB-T with monopole antenna transcription job is also stored in an S3 bucket. However, radio communication may not be detected in remote Users can create a custom vocabulary to help Amazon areas, the solution for this problem is additional patching to Transcribe recognize words that are specific to your use antennas or different antennas. case and improve its accuracy in converting speech to Features of this SDR tool are as follows: text. ● Discover devices attached to the computer. ● Process I/Q data from the supported devices. ● Change frequency, gain and apply various corrections (frequency, I/Q balance). ● AM, SSB, CW, FM-N and FM-W (mono and 4. Amazon Simple Notification Service (Amazon SNS) is stereo) demodulators. a web service that coordinates and manages the delivery ● Special FM mode for NOAA APT. or sending of messages to subscribing endpoints or ● Variable band pass filter. clients. ● AGC, squelch and noise blankers. In Amazon SNS, there are two types of clients— ● FFT plot and waterfall. publishers and subscribers—also referred to as ● Record and playback audio to / from WAV producers and consumers. Publishers communicate file. asynchronously with subscribers by producing and ● Record and playback raw baseband data. sending a message to a topic, which is a logical access ● Spectrum analyzer mode where all signal point and communication channel.Subscribers consume processing is disabled. or receive the message or notification over one of the ● Basic remote control through TCP connection. supported protocols (that is, Amazon SQS, HTTP/S, ● Streaming audio output over UDP. email, SMS, Lambda) when they are subscribed to the topic. B. Linux - shell scripting A shell script is a computer program designed to be run by the Unix/Linux shell. A shell is a command-line interpreter and typical operations performed by shell scripts include file manipulation, program execution, and printing text. Here, the shell scripting is used for the purposes as follows: 5. Amazon CloudWatch monitors Amazon Web Services 1. Record conversation from SDR tool (AWS) resources and the applications running on AWS 2. Upload the recording to AWS S3 bucket in real time. Users can use CloudWatch to collect and track metrics, which are variables and can measure the resources and applications. As audio recording is successfully uploaded to the Amazon S3 bucket, a lambda function configured on Amazon S3 bucket to trigger at PUT_OBJECT event will be triggered and call the Volume 8, Issue 7, 2020 http://aegaeum.com/ Page No: 548 AEGAEUM JOURNAL ISSN NO: 0776-3808 [4] Herschel H.
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