Decision Device:接收到的信号和+1近还是和-1近,进行判决。 BPSK Demapper:+1——0 -1——1 注:倒数第二列error。 3. BER(Bit - Error Rate,误码率) and SNR(Signal - to - Noise Ratio,信噪比) 误码率:我们传输1000个bit,有1个错误,误码率为1/1000。 信噪比=信号的能量/噪声的能量 用dB表示信...
根据消息传递方式的不同,LDPC码的译码算法主要分为两种类型:软判决译码(SDD, Soft Decision Decoding)和硬判决译码(HDD, Hard Decision Decoding)[4]。硬判决译码方式是将信息与判决门限比较并直接进行判决,传递的信息都是0、1这样的二进制信息,比特翻转算法(BF, Bit...
To address the drawbacks caused by soft-decision LDPC decoding, this paper proposes a hybrid hard-/soft-decision LDPC decoding strategy. Simulation results show that the proposed approach could reduce the read latency penalty and hence improve the decoding throughput up to 30 %, especially in ...
根据消息传递方式的不同,LDPC码的译码算法主要分为两种类型:软判决译码(SDD, Soft Decision Decoding)和硬判决译码(HDD, Hard Decision Decoding)[4]。硬判决译码方式是将信息与判决门限比较并直接进行判决,传递的信息都是0、1这样的二进制信息,比特翻转算法(BF, Bit Flipping Algorithm) [5-6]和加权比特翻转算法...
(pos,1:4); %Soft-decision decoding corr = (1-2*cwords)*r'; [mind2,pos] = max(corr); msg_cap2 = cwords(pos,1:4); Nerrs = sum(msg ~= msg_cap2); if Nerrs > 0 Nbiterrs = Nbiterrs + Nerrs; Nblkerrs = Nblkerrs + 1; end end BER_sim = Nbiterrs/k/Nblocks; FER...
%Hard-decision decoding b = (r < 0); %threshold at zero dist = mod(repmat(b,16,1)+cwords,2)*ones(7,1); [mind1,pos] = min(dist); msg_cap1 = cwords(pos,1:4); %Soft-decision decoding corr = (1-2*cwords)*r';
msg_cap1 = 0; end %Soft-decision decoding if sum(r) < 0 msg_cap2 = 1; else msg_cap2 = 0; end Nerrs = Nerrs + sum(msg ~= msg_cap2); end BER_sim = Nerrs/k/Nblocks; disp( [EbNodB BER_sim Nerrs k*Nblocks] )
Can i have some assistance on the topic :Soft decision decoding of ldpc codes using Belief Propagation 0 Comments Sign in to comment. FEATURED DISCUSSION LLMs with MATLAB updated to support the latest OpenAI Models Large Languge model with MATLAB, a free add-on that lets you access... ...
[Y,actualnumiter,finalparitychecks] = ldpcDecode(llr,decodercfg,maxnumiter,Name=Value) specifies additional name-value arguments. For example, DecisionType='soft' specifies soft-decision decoding and outputs LLRs.Examples collapse all Decode Rate 3/4 LDPC Codewords Copy Code Copy Command Initialize...
Forward Error Correction (FEC) codes such as Low Density Parity Check (LDPC) codes provide a means to control errors in data transmissions over unreliable or noisy communication channels. The LDPC Encoder/Decoder core provides an optimized block for encoding and soft-decision decoding of these codes...