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Method and device for decoding

A decoding and decoder technology, applied in the field of communication, can solve problems such as high false detection rate, affecting system performance, and detected information verification, so as to increase occupied time, improve system performance, and reduce false detection rate Effect

Inactive Publication Date: 2013-01-02
ZTE CORP
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Problems solved by technology

[0008] a) Data calculation takes up a lot of processing time and affects the performance of the entire system;
[0009] b) There is no verification of the detected information, which may lead to a high false detection rate
[0010] For the problems of long data calculation time and high false detection rate in related technologies, no effective solution has been proposed so far

Method used

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Embodiment Construction

[0029] Hereinafter, the present invention will be described in detail with reference to the drawings and examples. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0030] In the LTE system, error checking of downlink control information (Downlink Control Information, DCI for short) is accomplished through a cyclic redundancy check (CRC) in DCI transmission information. Suppose the effective bit of PDCCH is a 0 , a 1 , a 2 , a 3 ,...,a A-1 , then the parity bit p 0 ,p 1 ,p 2 ,p 3 ,...,p L-1 , where A is the number of payload bits of the PDCCH, L is the number of check bits, and the check bit length of the DCI information of the control channel is set to L=16.

[0031] g CRC16 (D)=[D 16 +D 12 +D 5 +1], CRC length L=16, the input bit and the polynomial are processed to obtain the output sequence b 0 , b 1 , b 2 , b 3 ,...,b B-1 , B=A+L.

[0032...

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Abstract

The invention discloses a method and a device for decoding. The method includes that a first decoder is used for decoding soft information of a physical downlink control channel to acquire a first decoding result and attribute information of physical downlink control information; a second decoder is used for decoding the soft information according to the attribute information of the physical downlink control information to acquire a second decoding result; the first decoding result is compared with the second decoding result, and then the conclusion that the first decoder decodes the soft information successfully is determined when the first decoding result is consistent with the second decoding result. By the method and the device for decoding, accuracy in decoding of the physical downlink control channel (PDCCH) and system performance of user equipment can be improved.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a decoding method and device. Background technique [0002] The 3rd Generation Partnership Project (3GPP) proposes a Long Term Evolution (LTE) system of 3GPP air technology. The LTE system needs to support multi-antenna technology with lower delay, higher user data rate, larger system capacity, larger coverage and lower cost. In order to meet its high-speed transmission requirements for real-time services, broadcast and multicast services, in terms of channel coding and decoding technology, the LTE system adopts tail-biting convolutional coding and Turbo coding. [0003] Tail-biting convolutional encoding takes the last few bits of the data block to be encoded as the initial state of the registers in the encoder, forcing each codeword to have the same state at the beginning and end. This encoding method increases the complexity of decoding while improving the encoding efficie...

Claims

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Application Information

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IPC IPC(8): H03M13/09
CPCH03M13/3738H03M13/6525H03M13/413H03M13/09
Inventor 杜文亮
Owner ZTE CORP
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