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388 Threads found on Encoder Decoder
I am designing a channel encoder (BCH/RS/Turbo) + Modulator based digital communication system in simulink. My blocks in the design are 1) Ber. B. Gen/Ran Int Gen 2) BCH (15,7) or RS (255,223) encoder & decoder 3) QPSK/M-ary PSK Mod & De Mod 4) AWGN Channel the problem i am facing is the input to the modulator/demodulator should (...)
The receiver should work OK but the transmitter circuit is suspect. First point: make sure the transmitted data rate and receiver data rate are the same. Second point, the transmitter data inputs have internal pull-up resistors but your external transistors also pull the inputs to VCC, you need to pull the inputs low,
Hi. Cannot find information or equivalent. Can you help please ? It is a 20 pin dip, the 3.58MHz resonator is across pins 6, 7. Power minus to pin 10, plus to pin 20. Markings are: ESS 9009 ---> could be date ES3016-5 ---> Seems to be the part number --->
Hi I disgned 128b/132b encoder and decoder block in verilog code but my data width is 8 bit and my encoder' s input in 128 bit so how can I communicate my data bus with encoder?how can this encoder get 16 8 bit symbol?
Hey new to the forum and i need help with a project i have de2 boards and i need to have one board encode a message and the other board decode it and display it on a the 7 seg leds we have the encode/decode code but not sure how to get them to talk
Hi I want to design 128b/132b encoder and decoder.I got the verilog codes for 64b/66b encoding system but I dont know how should I use it for 128b/132b? Do you have the verilog code for 128b/132b?If no, please help me to write the codes
Hai Everybody, I want to do Digital communication lab experiment (SOURCE encoder AND decoder) using Multisim. So anybody please help me for which type of encoder and decoder can we use. Thanking You. With Regards, Sindhuri.
Parallel port has >50kB/s bandwidth easily. Your design requires a refresh rate spec and allowed latency, supply power source and LED Vf @If specs. If 0.5ms is allowed then refresh rate is 2kHz then parallel rate is 25kHz x8bit / Serial encoder/decoder would require 100 x 2kHz rate. If you need to latch the LED state, a serial clock and data po
Hi ;-) Can you help me with 64b/66b encoding?Do you have verilog code for this encoder and decoder ?or Do you know its architecture at gate level?
hello guys. I just begin with Proteus and i like it so mutch, but i have a big problem. In fact, there is no HT12E encoder and HT12D decoder inside. So i want to import HT12E and HT12D librairies but i dont know where to find it. Please help me! Thanks, Hugues.
cheap ASK modules won't give you good result unless you code them properly. Manchester coding or other suitable coding schemes. I strongly recommend you to use HT12E/HT12D encoder decoder pair ICs for acceptable result. Otherwise, you better use nRF24L01+ or similar standard modules as Easyrider83 suggested.
Why did you mention a microphone and a speaker? A microphone will not press a pushbutton switch on the encoder and the decoder does not have a power audio amplifier. If you set the encoder's oscillator to be an audio frequency then there will simply be a buzz if the decoder has an audio amplifier and speaker connected. I (...)
There's no such thing as "execution time" in logic design. We have logic propagation delay, clock speed of synchronous logic and possibly pipeline delays. In a synchronous 8b/10b decoder or encoder, the clock speed is usually equal to the symbol rate. Timing analysis assures that the implementation can keep up with the clock rate.
we are having 8 address bits. so we got only 2^8 combination. so we can able to design only 512 pairs. if we want to design more than 512 pairs, what we will do. Lets say that you want to design 1024 pairs of encoder and decoder both.Here you will be having 10 bits(1024=2^10).What I think could be possible(Could be wrong too,might n
i am doing project on turbo codes so if any one could help me for sending me the verilog code
This is in a generic register file generation and I have this code, when I synthesize, im getting a priority encode decoder. Is there any way I can avoid priority encoder/decoder for for loop? Else is there any way I can have a case statement which is scalable (dont know how many case expressions will be there beforehand) 1 for( i
AS you mentioned you are getting valid data from decoder.. But you are not getting for LED... kindly post the schematic of your design... iam checking for data transfer through ht12e and ht12d via using direct connecting dout and din pins...the problem is that ..iam giving input at data pins of encoder but the led's at de
Hi, I am working on a project that involves interfacing of camera with microcontroller cc2540. The raw video is to be encoded into H.264 format and transmitted over bluetooth low energy interface. I am looking for C code for H.264 encoder and decoder. Where can I find C code for H.264? Thanks.
Name some Cheap IR encoder and decoder except holtek and Princeton technology
my project block diag: keypad(input)=>pic16f877a=>max232=>DTMF encoder=>RF 433 ASK Tx => RF 433 ASK Rx=>DTMF decoder=>max232=>pic16f877a=>relays the data is being correctly transmitted and received using max232. so in cross questioning if i asked why i'm using max232 is then what will be the answer?? plz help me
The 555 output is a square wave that is full of harmonic frequencies, not just one sine wave frequency. You need a bandpass filter for each frequency that is not a simple capacitor. Why not use a touch-tone encoder IC for the transmitter and a touch tone decoder IC for the receiver instead then the frequencies will be accurate and harmonics of
You need a encoder IC like HT-12E to make it serial. and connect the transmitter circuit on the out pin of HT-12E. You can refer a lot of circuits available in internet using HT-12E & HT-12D(decoder at receiver end)
How to measure bit error rate in Matlab using hamming code?
Hi Friends, I want to generate decoder Boolean expression if I have a truth table for encoder. What is the procedure? The encoder encodes, input which is 4 bit to 5 bit. How can I used these 5 bits and get the 4 bits back. Following is the truth table: A B C D d4 d3 d2 d1 d0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 0 0 1 0 0 0 0 0 (...)
hello, can anybody tell me important parameters of convolutional encoder and viterbee decoder so that at the end of receiver I can comaper result for various figures?
I wonder which RF module is prepared to transmit an analog baseband signal as the DTMF generator output? Likewise standard receiver modules have digital outputs not suitable to feed a DTMF decoder. In so far the sketched solution seems to be unusual and probably depends on specific module hardware. More often RC encoder/decoder chips are (...)
Hello everyone, looking for a cheap OEM module like the consumer dvb-t modulators used to inject an analog a/v into the home TV plant. These systems would be nice and can be received with a consumer receiver, however it would be very nice doing it in QPSK so a lower snr would be required
Hello, my final year project is FPGA Implementation of Hamming far as I know, I need to write seperate programs for Hamming Code, ROM, RAM, Clock Divider, encoder, decoder, Syndrome, Transmitter , Receiver and Main.The FPGA I'm using is Actel ProASIC 3 A3P250.The problem, I couldn't get the block diagram clear in my head.And I'm not gettin
i am doing a project of convolutional encoder with viterbi decoder with K=7 AND r=1/2 also using FPGA for implementing i need VERILOG HDL code of it and i have more doubts about this project....please kindly help me to doing this
Hi i have with me 433rf moduled transmitter and receiver along with encoder HT12E and decoder HT12D..m using atmega16 and feeding code at avr request here is can anyone provide me a complete program/code along with circuit diagram....plzz i need it soon.... And sir can you plz elaborate how to calculate rosc at transmitter side for h
I was wondering if I can just connect the FPGA directly to the Rx. Yes, if you manage to model the decoder algorithm. To simulate the overall system, you would need to model also the encoder. As far as I know the HT12x datasheets, the encoded data format isn't exactly documented.
Hello, I am trying to make a manual robotic car controlled by wireless remote and for the "wireless remote" I wanted to make a dual frequency remote not using DTMF but two RF modules with frequency 315 and 433 MHz and, HT 12D and HT 12E as decoder and encoder for the modules. Can anybody please help me with how can I mix these two frequencies a
You can connect the encoder's output y to the decoder's input a, simply using a wire. Here both have same number of bits. So declare a wire of size and connect. You cannot port map y with b. Because both are output.
Hello Mates , I'm in deep need to generate a LDPC encoder and decoder Module in Verillog OR VHDL for FPGA Implementation. Also 64-QAM Rectangular Modulation in HDL is required , can anyone help me out ? Regards Santhosh Kumar Thanna
can anyone pls help me with LDPC encoder and decoder......i am in urgent need to complete my thesis within this month...but still i am not getting a correct code for LDPC...
hello folks. I want to use a 433Mhz RF Rx-Tx with 8 bit encoder/decoder - HT640/HT648L, I'm from bangalore, and i called some of the electronics dealers shops. they said that IC's HT640/HT648L are discontinued. Is it really possible to get these IC's and wat will be its cost??
Hello guys !! I want to use two 433MHz rf transmitters at same place !! I have implemented 2 RF transmitter & receiver circuits using :- -Easily available 433MHz modules from -Ht12d & Ht12e ICs for decoding & encoding data !! These encoder & decodera have facility to ?djust address also !! So i have configured different addresses t
HT12E is encoder, can't work as decoder. You have to map 8-bit data to an unique sequence of 4-bit codes
Hello, I want to simulate DBPSK modulation in AWGN channel using convolutional encoder and Viterbi decoder. I built the model in Simulink for hard decision of Viterbi decoder and it is working Ok. Now, I am trying to do the soft decision decoding, but I can't get the correct answer and BER is about 0.5. I used the quantization for the (...)
i am making a wireless trigger to trigger studio flash. for this i am using 8051 controller rf module, encoder ht12e ,decoder ht12d. transmitter side: i am using encoder with at89c2051 rf transmitter receiver side: using decoder with 8051 rf receiver now the requirement is the if at a place there a 3 studio flash (...)
As the decoder and encoder is asynchronous. When the incoming bit is a '1', the decoder does not know if its a '1' or a '111111'. So if it samples the incoming bits at a high rate, then it can find out how long a '1' or a '0' last for (in terms of of its own clock pulses), i.e. 27 '1's then 11 '0's is actually '110' and then lock up its (...)
Hello! I am trying to build a small IR remote control module. It has 8 keys, attached to port b of PIC16F886. Same controller used to receiver IR data and display it into binary for bcd to 7seg display. I have written whole code for PIC in CCS C. Code simulates perfect in MPLAB. I have a few questions. 1) I read on some website that I should not
i want to use pic 676 as PT2272-m4 (remote cotrol decoder). i just want to decode the code comes from PT2262 RF remote encoder. Can any body help me? Thanks in advance
I am writing a matlab code about convolutional encoder. I have created trellis for 4,8,16 and 32 states and their corresponding viterbi decoder(using vitdec matlab function). My system goes like this: Trellis encoder-->DPSK Modulator-->Rayleigh fading Channel + awgn Noise-->DPSK Demodulator-->Viterbi decoder For the 4 (...)
I am writing a matlab code about convolutional encoder. I have created trellis for 4,8,16 and 32 states and their corresponding viterbi decoder(using vitdec matlab function). My system goes like this: Trellis encoder-->DPSK Modulator-->Rayleigh fading Channel + awgn Noise-->DPSK Demodulator-->Viterbi decoder For the 4 (...)
The link tells me you have exceeded the limit of times it can be seen. Perhaps if you could say what the part numbers of the encoder/decoder are it would help. Brian.
hi saqib malik i need verilog code for turbo encoder and decoder using verilog pls help me.. send the code to my email :'(
Hi i've to design a NRZI encoder / decoder system in VHDL. The encoder and decoder will be implemented on 2 different fpgas (tx,rx) I've wrote this for encoder entity NRZI_encoder is Port ( CLK : in STD_LOGIC; D : in STD_LOGIC; Q : out STD_LOGIC); end (...)
I need a list of encoder/decoder ICs which have more than 4 Channels. I have a pair of HT12E and HT12D. But they are only 4 channel. I need to make a robot which will need multiple channels. Given that the robot moves, I would need a motor driver. So only 4 channels would mean that the motor driver would run only two motors if I wanted them to run
I am making wireless robot using HT12E encoder and HT12D decoder and DPDT. My circuit is as in attached fig. Is my circuit right? In data-sheet diodes are connected with reset switch, is it necessary to connect diodes? If yes then how they will be connected when using dpdt? When I am checking volatage at Dout it is 0.0v always. I also checked b

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