NDLI: Study and design of a digital interphone based on dPMR446

Content Provider	IEEE Xplore Digital Library
Author	Chaodong Ling Zheping Chen Ruimin Huang
Copyright Year	2012
Description	Author affiliation: Faculty of Information Science and Engineering of Huaqiao, University, Xiamen, China (Chaodong Ling; Zheping Chen; Ruimin Huang)
Abstract	In order to meet the need of the market and the interphone's transition from analog to digital, this paper presents the design of a digital interphone based on dPMR446 communication protocol and MELP (mixed excitation linear prediction) vocoder. The system based on the scheme of combining MCU (micro control unit) with DSP (digital signal processor) has good practicability and expansibility. The emphasis of the article is on the introduction of the overall system architecture, the design of MCU software, the section of phase locked loop in hardware circuit and the sending and receiving process. Besides, the digital baseband process including the communication protocol and the speech coding algorithm is illustrated. Realizing the digital baseband system by the DSP can not only simplify the hardware circuit, lower cost and power consumption, but also is convenient to choose different kinds of baseband processing algorithm as needed.
Starting Page	1
Ending Page	4
File Size	221316
Page Count	4
File Format	PDF
ISBN	9781467321440
ISSN	21635048
e-ISBN	9781467321457
e-ISBN	9781467321433
DOI	10.1109/ICASID.2012.6325339
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-08-24
Publisher Place	Taiwan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Baseband Frequency modulation Protocols digital signal processor Voltage-controlled oscillators digital interphone Digital signal processing MELP Band pass filters dMPR446 Phase locked loops
Content Type	Text
Resource Type	Article

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