Examples of 'constraint length' in a sentence
Meaning of "constraint length"
constraint length: In the field of information theory, it refers to the number of symbols in a sequence that affect the decoding of a digital data stream
How to use "constraint length" in a sentence
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constraint length
All the elementary channels are regarded as exhibiting the same constraint length x c.
The lower constraint length reduces the complexity of the corresponding decoder at the receive system.
N is chosen to be larger than the decoding constraint length for convolutional codes.
Each is based on a constraint length 7 convolutional code that is standard in the industry.
The figure shows a part of a trellis diagram of a binary convolutional code with the constraint length L = 4.
In other words, the greater constraint length is selected.
The constraint length judging unit 122 has an embedded inverse conversion table of Table 2.
In the exemplary embodiment decoder 58 is a Viterbi decoder of constraint length 7.
In a current implementation a constraint length 9, rate convolutional encoder is employed.
PRIME uses a convolutional code with ½ rate and constraint length of 7.
Here, i is called a constraint length and r is imax, a maximum constraint length.
An alternative embodiment uses a constraint length of K=9.
For a CC with constraint length 7, 6 tail bits are needed for termination.
The first embodiment uses a constraint length of K=7.
For a constraint length of 9, a chainback path depth of 63 states is sufficient.
See also
The length of the data sequence delay is equal to K-1, where K is the constraint length.
The maximum constraint length r is 2.
The convolutional encoder 30 is preferably a 1/3 rate convolutional encoder with a constraint length of 7.
In other words, the greater constraint length is selected to be transmitted to the multiplexer 36.
Also, in the exemplary embodiment, the encoder 602 has a constraint length of nine.
In addition, the maximum constraint length r in the conversion table of Table 2 is 4.
This performance can be achieved with a 1/2 rate convolutional code and a constraint length of 7, for example.
That is, the constraint length N is equal to 6.
The FEC encoder is a standard rate 1/2 turbo encoder with constraint length 3.
That is, for the constraint length i = 1, the 4 basic codes are put in a main table.
These are encoded using a convolutional code with constraint length K 32 and a rate of r 1 ⁄ 2.
With constraint length less than 10, usually decoded using a Viterbi algorithm ( see Viterbi decoder ) ;.
The Viterbi decoder is preferably of a constraint length 9, and of a code rate 1/2.
With constraint length more than 10, usually decoded using a Fano algorithm ( see Sequential decoder ) ;.
For the described embodiment, FEC with coding rate of 1/2 and constraint length 7 is used.
The Viterbi decoders of the exemplary embodiment have a constraint length of K=7 and a rate of R=1/2.
For the described arrangement, FEC with coding rate of 1/2 and constraint length 7 is used.
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