1. BASE BAND ENCODER Project Team Shashank Tadakamadla
Srinivasa Rao Mulakala
Supported By
Bengt  Oelmann
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2. BASE BAND ENCODER Introduction Overview of System Encoders
Interfacing of System
Results
Conclusion
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3. BASE BAND ENCODER Introduction
Base band Encoder is a part of ZigBee lite transmitter.
Zigbee is poised to become the leading wireless technology for a myriad of uses ranging from building automation to industrial and residential applications.
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4. To Design a dedicated hardware module that performs
AIM OF THE PROJECT
To Design a dedicated hardware module that performs
Encoding techniques.
The encoded signal should be 8 bit digital signal of 40 MHz.
The type of output and the data rate of the output digital
signal should be configured from microcontroller.
The maximum clock freq is 40 MHz.
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5. BASE BAND ENCODER What is Base Band Encoding ?
Converting 0s and 1s (binary data) into a Digital Signal is
called LINE CODING.
The process on Line Coding is called ENCODING. Various Encoding
schemes are used to transmit digital data across
a medium effectively and error free.
The process of transmitting encoded digital data over single
unmultiplexed channel is defined as Base band Encoding.

6. BASE BAND ENCODER S & M Design Team 2019-04-04 PARALLEL TO SERIAL
CONVERTER
N R Z
R Z
MANCHESTER
DIFFRENTIAL
WISHBONE INTERFACE
8 BIT REGISTER
4 X 1
M U X Do D1 D2 D3 D4 D5 D6 D7
A CK Co C1 C2 C3
ADDRESS BUS
DATABUS
WRITE BUS
S o
S 1
SEQUENTIAL
OUTPUT CODE
REQ
HANDSHAKE
SIGNALS
ENCODED
SERIAL DATA
FREQUENCY
MODULATOR
4 x 1
MUX
40 MHZ
S 2
S 3
LSB FIRST
LOAD 4
REQUEST
SHIFT ENABLE
MIDDLE TRANSITION
RESET
PARALLEL
8 BIT DATA
AS INPUT
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7. BASE BAND ENCODER Classification of digital encoding schemes
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8. BASE BAND ENCODER NRZ 0- Negative 1- Positive RZ 0- Same as input
1- Transaction at the middle of the bit
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9. BASE BAND ENCODER NRZ 0- Negative 1- Positive RZ 0- Same as input
1- Transaction at the middle of the bit
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10. BASE BAND ENCODER Manchester Differential Manchester
Transaction from high to low indicates 1
Transaction from low to high indicates 0
Differential Manchester
0 is represented by presence of transition at the begining of the bit period
1 is represented by absence of transition at the begining of the bit period
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11. BASE BAND ENCODER Manchester Differential Manchester
Transaction from high to low indicates 1
Transaction from low to high indicates 0
Differential Manchester
0 is represented by presence of transition at the begining of the bit period
1 is represented by absence of transition at the begining of the bit period
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12. BASE BAND ENCODER Advantages & Dis-advantages S & M Design Team

13. BASE BAND ENCODER Basic Formulae TB = 1/D; N = TB/TS.
Where,
TS =System clock time (sec).
TB =Time taken per bit (1/s).
N =No of clk cycles required to transmit a bit.
D =Data rate (kbps).
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14. Differential Manchester
BASE BAND ENCODER
WISHBONE INTERFACE S3 S2
Data Rate(Kbps) 10 1 20 40 80 S1 S0
Encoding Type
NRZ 1 RZ
Manchester
Differential Manchester
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15. BASE BAND ENCODER Results
BASE BAND ENCODER
Results
The outputs obtained from MAT LAB and VHDL are similar.
The encoded digital output Can be obtained at four different data
rates as per the requirement.
Total memory usage is kilobytes
SYNTHESIS REPORT
Number of Slices: out of %
Number of Slice Flip Flops: out of %
Number of 4 input LUTs: out of %
Number of bonded IOBs: out of %
Number of GCLKs: out of %
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16. BASE BAND ENCODER Conclusion
We have successfully obtained the required type of
codes at the output as well the signal is continuous.
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17. BASE BAND ENCODER
THANKS
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