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Description: Generate trellis data of a rate-1/n convolutional encoder.卷积码1/n的编码器，注意生成的是非系统码。-Generate trellis data of a rate-1/n convolutional encoder. Convolutional codes 1/n of the encoder, the attention generated by the non-system code.
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Size: 4096 |
Author: 戈津生 |
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Description: Space-time trellis encoder/decoder for QPSK modulation
2 bits per second per Hertz- Space-time trellis encoder/decoder for QPSK modulation
2 bits per second per Hertz
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Size: 2048 |
Author: phares |
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Description: this the encoder program for the encoding of trellis coded modulation in matlab.-this is the encoder program for the encoding of trellis coded modulation in matlab.
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Size: 1024 |
Author: abhi |
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Description: this the state encoder anfd decoder for trellis coded modulation
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Size: 1024 |
Author: abhi |
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Description: This function implememts Soft Output Viterbi Algorithm in trace back mode
Input:
rec_s: scaled received bits. rec_s(k) = 0.5 * L_c(k) * y(k)
L_c = 4 * a * Es/No, reliability value of the channel
y: received bits
g: encoder generator matrix in binary form, g(1,:) for feedback, g(2,:) for feedforward
L_a: a priori information about the info. bits. Extrinsic info. from the previous
component decoder
ind_dec: index of the component decoder.
=1: component decoder 1 The trellis is terminated to all zero state
=2: component decoder 2 The trellis is not perfectly terminated.
Output:
L_all: log ( P(x=1|y) ) / ( P(x=-1|y) )
Frame size, info. + tail bits- This function implememts Soft Output Viterbi Algorithm in trace back mode
Input:
rec_s: scaled received bits. rec_s(k) = 0.5 * L_c(k) * y(k)
L_c = 4 * a * Es/No, reliability value of the channel
y: received bits
g: encoder generator matrix in binary form, g(1,:) for feedback, g(2,:) for feedforward
L_a: a priori information about the info. bits. Extrinsic info. from the previous
component decoder
ind_dec: index of the component decoder.
=1: component decoder 1 The trellis is terminated to all zero state
=2: component decoder 2 The trellis is not perfectly terminated.
Output:
L_all: log ( P(x=1|y) ) / ( P(x=-1|y) )
Frame size, info. + tail bits
Platform: |
Size: 1024 |
Author: yk |
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Description: 生成网格内存码率的1 / n卷积编码器的数据，在非系统的情况下，模拟二进制卷积码的编码和解码程序-Generate trellis data of a memory-m rate-1/n convolutional encoder: Nonsystematic case ，simulating encoding and decoding procedures of binary convolutional codes
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Size: 1024 |
Author: karen |
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Description: SOVATEC是实施软输入软输出维特比
算法。该算法可以使用被称为其中味精是软输入（码字），LLR是每比特的先验信息对位（对数似然比），棚架棚架结构描述卷积编码器，用于编码的原始信息的消息。- SOVADEC is an implementation of the soft input soft output Viterbi
algorithm. The algorithm can be called using
DEC = SOVADEC( MSG, LLR, TRELLIS, WIN )
where MSG is the soft input (codeword), LLR is a priori information
per bit about the bits (log likelihood ratios), TRELLIS is the
trellis structure describing the convolutional encoder used to
encode the original information message.
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Size: 3072 |
Author: 冬瓜 |
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Description: 采用卷积编码与维特比译码对通信过程进行了仿真，展示了卷积码的差错校正容量，调制方式采用QPSK-This demo shows how to use a convolutional encoder and decoder in a
simulation of a communications link. It also shows the error correcting capability of convolutional codes. This demonstrates the convolutional
trellis generator, POLY2TRELLIS, encoder, CONVENC, and decoder, VITDEC.
It also demonstrates the use of other functions (e.g. INTDUMP, RECTPULSE,
BITERR, BERCODING, RANDSRC, and AWGN) and objects (MODEM.PSKMOD and
MODEM.PSKDEMOD). Many of these functions are described in greater detail
in the "Phase Shift Keying Simulation" demo. Finally, this demo displays
empirical performance curves for QPSK with Gray coding using data
generated by the example, VITSIMEXAMPLE.
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Size: 3072 |
Author: 马健 |
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Description: trellis based hard viterbi decoder for conultional encoder with rate 1/2 and generator polynomial [13,15] with initial zero state
Platform: |
Size: 1024 |
Author: Ahmed Ibrahim |
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