21P61A0402-A.Srikanth Reddy adc pra.pptx
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This document provides an overview of digital radio communication. It discusses digital radio transmission using digital technology rather than analog. It describes types of digital audio broadcasting such as DAB, DAB+, ISDB-TSB, and HD Radio. It compares analog and digital communication, outlining advantages of digital such as clearer sound quality and ability to transmit additional audio channels. Applications of digital radio communication technology include computer modems, DSL, microwave/satellite communications, digital TV, and PCS. The document concludes that digital radio communication plays a crucial role in modern technology.
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21P61A0402-A.Srikanth Reddy adc pra.pptx
- 1. PARTICIPATORY REPORT AND ASSESSMENT(PRA) DIGITAL RADIO COMMUNICATION ELECTRONICS AND COMMUNICATIONS ENGINEERING(ECE) SESSION(2022-23) ANALOG AND DIGITAL COMMUNICATIONS(ADC) SUBMITTED TO: MR:G.NARASIMHULU SIR PROFESSOR ECE DEPARTMENT VBIT, HYDERABAD SUBMITTED BY: NAME : A. Srikanth Reddy Hall Ticket no:21P61A0402 Section:ECE-A Year/Sem:II/II
- 2. TOPICS ? Introduction ? Digital Radio Communication ? Types of digital audio broadcasting ? Comparison between analog and digital communication ? Advantages and Disadvantages ? Applications ? Conclusion ? Reference
- 3. INTRODUCTION Digital radio is the use of digital technology to transmit or receive across the radio spectrum. Digital transmission by radio waves includes digital broadcasting, and especially digital audio radio services.
- 4. DIGITAL RADIO COMMUNICATION: ? Digital radio is the transmission and reception of sound processed into patterns of numbers, or "digits" – hence the term "digital radio." In contrast, traditional analog radios process TV into patterns of electrical signals that resemble sound waves. ? Digital radio reception is more resistant to interference and eliminates many imperfections of analog radio transmission and reception. However, there may be some interference to digital radio signals in areas that are far away from a station's transmitter. FM digital radio can provide clear sound comparable in quality to CDs, and AM digital radio can provide sound quality equivalent to that of standard analog FM. FM digital radio also allows broadcasters to offer additional audio channels to the public, using their existing FM frequency.
- 6. Types of digital audio broadcasting: ? Eureka 147 (branded as DAB ? DAB+ ? ISDB-TSB. ? Internet radio (Technically not a true Broadcast system) ? T-DMB V-Radio. ? FM band in-band on-channel (FM IBOC) ? HD Radio (OFDM modulation over FM and AM band IBOC sidebands) ? AM band in-band on-channel (AM IBOC) ? Satellite radio
- 8. ADVANTAGES: ? Advantages: 1. More conversations can take place on one channel. 2. Its more spectrally efficient, certainly, but the channel allocation depends on the system (FDMA v. TDMA) 3. Unit ID, enhanced text messages and status buttons can all be embedded into a digital radio channel. 4. Your bandwidth consumption is reduced with digital radios. 5. Both existing infrastructure and antenna systems can be used for transmitting digital signals. This is for FDMA (ie: dPMR). TDMA style systems require some modifications to take into account the accurate timing requirements.
- 9. Disadvantages ? Disadvantages: 1. It could take more time for first-time users to learn how to use. (For dPMR, the only change is how to select a digital channel rather than analogue. Other digital systems DO have more to learn, but dPMR was chosen because of its simplicity). 2. Digital signals will not tolerate RF (radio frequency) signals, and as a result if there is ever too much RF noise the signal can completely drop in error. (dPMR operates in the RF environment very similar to analogue, in both cases, if here is too much noise, both will fail. The difference is that an analogue radio will produce noise at the speaker which requires the operator to adjust the squelch control, the digital one will just go quiet).
- 10. APPLICATIONS ? Computer modems ? DSL ? Microwave and Satellite communications ? PCS ? DIGITAL TV
- 11. CONCLUSION In this PRA I have acknowledge about DIGITAL RADIO COMMUNICATION. I also known that digital radio communication is using in our technology is working a crucial role in this scientific World.
- 12. REFERENCE 1. My professor Mr.G.NARASIMHULU sir. 2. https://en.m.wikipedia.org/wiki/Digital_radio 3. Analog and Digital electronics by D. Chattopadhyay.