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Description: LDPC编码调制系统中基于反馈LLR均值的迭代解调／译码算法-LDPC coded modulation systems based on iterative feedback from the mean LLR demodulator/decoding algorithm
Platform: |
Size: 203776 |
Author: jinliang |
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Description: Simulation of a baseband QPSK mod/demod:
TX : a pseudo random bit stream generation, Serial to parallel conversion, QPSK Mapping (Gray coding), Signal power computation
Channel : AWGN channel
RX: Soft Demapping / Hard Demapping, Plot constellations, Compute BER-Simulation of a baseband QPSK mod/demod:
TX : a pseudo random bit stream generation, Serial to parallel conversion, QPSK Mapping (Gray coding), Signal power computation
Channel : AWGN channel
RX: Soft Demapping/Hard Demapping, Plot constellations, Compute BER
Platform: |
Size: 4096 |
Author: IMM |
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Description: soft Demapping QPSK : LLR computation using Euclidian distance approach, Parallel-to-Serial converter : needs I and Q components of QPSK symbols at the input
Platform: |
Size: 1024 |
Author: IMM |
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Description: good version of soft Demapping QPSK : LLR computation using Euclidian distance approache, Parallel-to-Serial converter, needs I and Q componets of QPSK symbols at the input
Platform: |
Size: 1024 |
Author: IMM |
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Description: corrected version of Demapping QPSK : LLR computation using Euclidian distance approach, Parallel-to-Serial converter, needs I and Q componets of QPSK symbols at the input
Platform: |
Size: 1024 |
Author: IMM |
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Description: illustrates the improvement in BER performance when using log-likelihood instead of hard decision demodulation in a convolutionally
coded communication link-illustrates the improvement in BER performance when using log-likelihood instead of hard decision demodulation in a convolutionally
coded communication link
Platform: |
Size: 2048 |
Author: javad |
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Description: This document is about 16 QAM demapping of received data. But its a soft demapping method based Log likelihood ratio(llr). So results can be used as inputs for viterbi decoder or turbo decoder. It is very usefull to decrease BER for communication systems. In addition, QPSK, 64QAM etc. demappers can be derived based on this document.
Platform: |
Size: 60416 |
Author: aydim turkken |
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