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Method and device for controlling input information of convolutional code decoder

A technology of input information and control method, applied in the field of convolutional code decoders, can solve the problems of increasing the manufacturing cost and manufacturing difficulty of convolutional code decoders, and achieve the effects of reducing manufacturing difficulty, delay and manufacturing cost.

Active Publication Date: 2015-01-14
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The problem solved by the present invention is that when decoding the non-return-to-zero convolutional code information sequence, a customized convolutional code decoder must be used for decoding, which increases the production cost and difficulty of the convolutional code decoder

Method used

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  • Method and device for controlling input information of convolutional code decoder

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Embodiment 1

[0064] Such as Figure 5 As shown, it is a schematic diagram of another embodiment of the control method in the embodiment of the present invention, and the input information is written into the storage space in the order of the storage addresses of the storage units from low to high. Among them, the storage units include m1, m2, m3, m4, m5 and m6, the first storage unit in the storage space is m1, the last storage unit in the storage space is m6, the first storage area includes m1 and m2, and the decoding window The value M is 3.

[0065] In the synchronous channel of CDMA2000, when the number of storage units that have stored input information is equal to the value of the decoding window, the convolutional code decoder starts to work. In other application environments, the convolutional code decoder may also start to work when the number of storage units that have stored the input information is greater than the decoding window value.

[0066] In the T1 execution cycle, th...

Embodiment 2

[0072] Embodiments of the present invention also provide a control device for input information of a convolutional code decoder, such as Figure 6 As shown, the control device includes:

[0073] The first control unit 100 is configured to sequentially receive input information and write the input information into the storage unit sequentially, and when the number of storage units that have written the input information is greater than or equal to M, control the convolutional code decoding The encoder reads the input information sequentially from the first storage unit where the input information is written to the storage unit where the input information is written in the current execution cycle, and the M is the decoding window value, and M is greater than 1 integer;

[0074] The copying unit 200 is configured to copy the input information written in the current execution cycle when the total number of the storage unit to which the input information is written in the current ...

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Abstract

The invention discloses a method and device for controlling the input information of a convolutional code decoder. The method for controlling the input information of the convolutional code decoder comprises the steps that when the total number of all the storage units from a storage unit where input information is written in the current execution cycle to the last storage unit in a storage space is smaller than or equal to M-1, the input information written in the storage unit in the current execution cycle is copied and stored, wherein the copied input information is stored in the storage unit in a first storage area in the storage space in sequence according to the copying sequence of the input information, and original input information in the storage unit is replaced; when the storage unit where the input information is written in the current execution cycle is the last storage unit in the storage space, the storage unit where input information is written in the next current execution cycle is the next storage unit which is adjacent to the storage unit where copied input information is stored last time. By the adoption of the method for controlling the input information of the convolutional code decoder, decoding can be conducted by means of a universal convolutional code decoder, and the manufacturing cost of the convolutional code decoder is reduced.

Description

technical field [0001] The invention relates to a convolutional code decoder in the field of communication technology, in particular to a method and device for controlling input information of a convolutional code decoder. Background technique [0002] Convolutional code is a kind of channel coding technology. It is a high-efficiency channel coding with excellent performance and low hardware complexity. Its performance is stable and it has been applied in many communication systems. [0003] The convolutional code encoder is an electronic device that encodes the continuously input information sequence according to the coding rules of the convolutional code to obtain the information sequence of the convolutional code. According to whether the state of the shift register used for encoding needs to be reset during the encoding process, the convolutional code encoder can be divided into a non-return-to-zero convolutional code encoder and a zero-return convolutional code encoder....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M13/23G06F12/02
Inventor 秦信江巫戈明
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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