NDLI: A TDMA modem design for multiparty communications with the relay function

Content Provider	IEEE Xplore Digital Library
Author	Dong Jegal Byoungchul Ahn
Copyright Year	2015
Description	Author affiliation: Dept. of Comput. Eng., Yeungnam Univ., Gyungsan, South Korea (Dong Jegal; Byoungchul Ahn)
Abstract	By utilizing the channel bandwidth in a pre-assigned time slot, TDMA is very useful to communicate voice and data for small group. It also provides the increased battery life by transmitting data in an assigned slot. Instead of two party communications, it can be applied to multiparty communications. This paper presents a design of the TDMA baseband modem to support multiparty voice communications with the relay functions to extend the communication distance. The baseband modem supports an ad-hoc function for multiparty communications and relays voice data from a slave node to the master node. The proposed baseband modem is expandable up to 8 relay nodes. The communication distance is extended up to 1.6Km when 2.4GHz frequency is used for a RF transmitter. To implement the multi-party communications and the relay function, the TDMA baseband modem consists of a cycle network controller, a sync time controller, a buffer controller and an asynchronous serial block. The protocol is programmed on Xilinx Zynq 7000 with Verilog HDL. The baseband modem is tested and verified its functions for 8-node relay communications and its measured maximum delay time is about 120msec for 8-node voice relay.
Starting Page	391
Ending Page	395
File Size	1995118
Page Count	5
File Format	PDF
ISSN	21545952
e-ISBN	9781467377881
DOI	10.1109/PACRIM.2015.7334868
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-08-24
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Relays Synchronization Modems Baseband Time division multiple access Radio frequency Bandwidth Baseband Modem Realy Multi-party TDMA
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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