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By Under the supervision ofNutan Sharma Dr Manoj Kr ShuklaM.Tech Final year Dept of Electronics EnggRoll No.5904530009 H.B.T.I. Kanpur, India
Dissertation presentation on
INTRODUCTION
HISTORY OF POWER LINE COMMUNICATION (PLC)
OPERATING PRINCIPLE OF PLC
POWER LINE AS A COMMUNICATION CHANNEL
MODULATION SCHEMES USED WITH PLC
ADVANTAGES OF POWERLINE COMMUNICATION
IDMA SCHEME
IDMA OVER POWER LINE CHANNEL
SIMULATION RESULTS
CONCLUSION & FUTURE SCOPE
REFERENCES
In Power Line Communications (PLC) data
has been transferred through power lines
using advanced modulation technology.
In 1950 It was used for one way town lightening, relay and remote control.
In mid 1980s there was the beginning of research into the use of the electrical grid to support data transmission in the one way direction.
Broadband over PLC only began at the end of the 1990s.
Broadband over PLC only began at the end of the 1990s.
In 1997 first test for bidirectional data signal transmission over the electrical supply network, by Ascom (Switzerland) and Norweb (U.K.)
In 2000 some tests carried out in France by EDF R&D and Ascom.
Message signal in form of high frequency data (1.6 MHz to 30 MHz) is super imposed over the low frequency signal employed as carrier at low energy levels.
Model of power line channel consists of time-varient filter and additive noise .
All impairments can be incorporated into a single filter model.
Transfer function and noise can be estimated through measurements and theoretical analysis.
Where H(f,t) =Hin (f,t).Hchannel (f,t).Hout (f,t)
Output = input (conv) H(f,t)
Figure 2- A simplified model of power line channel
Where A,B,C,D are the coefficients of the F matrix ,V1 ,I1 are the input voltage and input current and V2 ,I2 are the output voltage and output current
And the transfer function can be given as
= propagation constant
Component model is expressed by matrics F
Already existing electrical network is being used.
Quickly deployed with existing technologies.
No additional wiring is required.A robust encryption method is employed.
Two multiple access schemes has been deployed with power line communication-
OFDM This scheme was chosen by the Homeplug committee, all Homeplug standard equipment uses OFDM.
CDMAThe first direct sequence multiple access (DS-CDMA) [3] is being used with low frequencies of power line channel.
BER performance versus Eb/No of the OFDM system when the systembandwidth and carrier number are fixed as 3 MHz and 16 respectively[32]
User specific interleavers are used here for the user separation.
Inherits many advantages from CDMA such as dynamic channel sharing, mitigation of cross- cell interferences, asynchronous transmission, ease of cell planning.
Allows a low complexity multiple user detection techniques applicable to systems with large numbers of users in multipath channels.
2 4 6 8 10 12 14 1610
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Bit
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idmaPLC,n=8,Eb=15dB,m=512idmaPLC ,n=16,15db,512" " ,n=32,15dB,512n=64
Plot - Results of PLC IDMA at different number of users in same environment conditions
2 4 6 8 10 12 14 16 18 2010-6
10-5
10-4
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Bit
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e
performance of uncoded IDMA with PLC at different EbNo
plc.EbNo=5dBplc.EbNo=10dBAwgn,EbNo=5dBAwgn,EbNo=10dB
Plot–comparison of PLC with AWGN at the different EbNo
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10-1.4
10-1.3
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PLC channelAWGN channel
Plot - Performance of PLC with increasing user count
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Eb/No
Bit
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uncoded plc,n=20uncoded awgn,n=20coded plc,n=20coded awgn,n=20
Plot - Simulation of IDMA with PLC and IDMA with AWGN with coding and without coding.
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datalen=216datalen=512datalen=1024datalen=2048
Plot - performance of uncoded IDMA systems at no of users=20
2 4 6 8 10 12 14 16 18 2010-4
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data=216data=512data=1024data=2048
Plot - Number of users vs bit error rate plot with different data length
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uncoded,n=10uncoded,n=16uncoded,n=32
Plot - Simulation of power line communication with Uncoded IDMA with QPSK modulation
2 4 6 8 10 12 14 16 18 2010
-5
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Bit
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data216data512data1024
Plot - performance of coded IDMA system
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datalen=512datalen=1024datalen=2048coded,datalen=216
Plot - Simulation of PLC with coded IDMA at different data lengths
2 4 6 8 10 12 14 1610-3
10-2
10-1
No. of simultaneous users
Bit
Erro
r Rat
e
usernum=8,m=216m=512m=1024m=2048
Plot - BER performance of coded IDMA with QPSK at different users at data length=512
2 3 4 5 6 7 8 9 1010-4
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coded,n=10coded,n=16coded, n=32
Plot -Simulation of PLC with Coded IDMA with QPSK ,EbNo=3dB
5 10 15 20 25 30 35 40 45 5010-6
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m=256m=512m=1024m=2048
Plot - Simulation of PLC with coded IDMA variation of number of usersand data lengths
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n=8,m=256,block=20n=16,m=256,20n=32n=64,m=256n=8,m=512n=16,m=512n=32,m=512n=64,512n=16,m=1024n=32,m=1024n=16,m=2048n=32,m=2048
Plot - Simulation of PLC with uncoded IDMA with tree base interleaver
10 15 20 25 30 35 40 45 5010-4
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Bit
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BPSKQPSK
Plot - PLC IDMA with tree based interleaver AT m=1024
2 4 6 8 10 12 14 1610-4
10-3
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Eb/No
Bit
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with QPSK n=16,m=1024BPSK,n=16,m=1024
Plot- Simulation of PLC with IDMA system having QPSK modulation
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n=8,datalen=512n=16n=32
Plot -Simulation of PLC with IDMA with different users count
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n=16,Eb=10,m=512,BPSKn=16,QPSKn=8,BPSKn=8,QPSKn=8,BPSK,m=1024n=8,QPSK,m=1024n=16,BPSKn=16,QPSK,m=1024
Plot -coded IDMA with TBI, PLC, BPSK & QPSK
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n=16,Eb=10,m=512,BPSK,TBIn=16,QPSK,TBIn=16,BPSK,RI Codedn=16,QPSK,RI
Plot -Performance of TBI,RI with coded IDMA ,PLC,BPSK & QPSK
Plot - Coded IDMA with prime interleaver with different user count.
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n=1,m=512n=8,m=512n=16n=32,eb=12dBn=64Eb=12dB
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Primeinterleaver Random interleaver
Plot -Simulation of comparing prime interleaver with random interleaver
PLC solutions may be seen as complementary or alternative solutions to traditional fixed line networks and wireless networks .
Using IDMA with PLC, one can achieve a system having advantages of both schemes IDMA as well as power line channel.
Using advance modulation multiple access schemes, PLC could be used widely.
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