Tetra Ppt 6604 Edited

29 Jan 2010 ON Modern Communication Network-TETRA M. M A H E S H C H A N D R A, 0 9 0 1 6 T 6 6 0 4 M.TECH (DIGITAL COMMUNICATION), KAKATIYA INSTITUTE OF TECHNOLOGY , WARANGAL. By

KEYWORDS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

I N D E X ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

INTRODUCTION TO RADIO TRUNKING Digital Radio Trunking Systems – TETRA ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

INTRODUCTION TO RADIO TRUNKING Digital Radio Trunking Systems – TETRA ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

TETRA -INTRODUCTION ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

TETRA -INTRODUCTION ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

TETRA SPECIFICATIONS TABLE 1 P A R A M E T E R V A L U E Channel spacing 25K Hz Modulation π/4 DQPSK Modulation rate 36 kbps Bits per symbol 2 Voice coder rate ACELP (4.56 kbps ) Access format TDMA with 4 time slots/carrier User data rate 7.2 kbps per time slot Maximum data rate 28.8 kbps Protected data rate Up to 19.2 kbps

DATA RATES with DIFFERENT PROTECTION LEVELS Data Throughput (bits/sec) TABLE 2 NO. TIME SLOTS High Level Protection Medium Level Protection No Protection 1 2400 4800 7200 2 4800 9600 14400 3 7200 14400 21600 4 9600 19200 28800

TETRA FRAME STRUCTURE. ,[object Object],[object Object],FIG 1

TETRA FRAME STRUCTURE. TDMA Structure of the voice + data system 0 1 2 57 58 59 ... hyperframe 0 1 2 15 16 17 ... multiframe 0 1 2 3 0 time slot 509 frame 14.17 ms 56.67 ms 1.02 sec 61.2 sec CF Control Frame ,[object Object],[object Object],[object Object],FIG 2

TETRA FRAME STRUCTURE. BIT RATE OF TETRA SYSTEM ,[object Object],14.167 msec . Bit duration =14.167 msec/510 Bit rate =1/bit duration Bit rate = 36000 bits/sec ,[object Object],FIG 3 1 2 3 4 508 509 510

TETRA –SPECTRUM EFFICIENCY COMPARISION WITH OTHER STANDARDS ,[object Object],[object Object],FIG 4

TETRA CALL TYPES ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

TETRA CALL TYPES Simplex calls ,[object Object],[object Object],[object Object],[object Object]

TETRA CALL TYPES Duplex calls ,[object Object],[object Object],[object Object]

TETRA CALL TYPES Private call ,[object Object],[object Object],[object Object]

TETRA CALL TYPES Phone call ,[object Object],[object Object],[object Object],[object Object]

TETRA CALL TYPES- Group call ,[object Object],[object Object],[object Object],[object Object]

What about commercial digital networks? GSM / CDMA 2000 ,[object Object],[object Object],[object Object],[object Object],[object Object]

Difference between GSM and TETRA System T E T R A G S M ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Divisions in INDIA using TETRA radio system ,[object Object],[object Object],[object Object],[object Object]

Digital Radio Trunking Systems – TETRA Summary ,[object Object],[object Object]

Digital Radio Trunking Systems – TETRA Summary ,[object Object],[object Object],[object Object],[object Object],[object Object]

Digital Radio Trunking Systems – TETRA Summary Four-channel TDMA gives excellent spectrum economy - 4 channels in one 25 kHz carrier . Trunking technology supports controlled use of shared networks . Three Carriers- 12 Channels FIRE POLICE MEDICAL FIG 5

CONCLUSION ,[object Object],[object Object],[object Object],[object Object]

REFERENCES ,[object Object],[object Object]

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Tetra Ppt 6604 Edited