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Decoding method of PUCCH and apparatus thereof

A technology of control channels and pilot symbols, applied in the decoding field of uplink control channels, can solve problems such as the deterioration of decoding performance under large frequency offset, and achieve the effect of small performance loss and improved decoding performance.

Active Publication Date: 2012-05-23
SUZHOU ZHILVE INTELLECTUAL PROPERTY OPERATION CO LTD
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a decoding method and device for an uplink control channel to solve the problem of deterioration of decoding performance under large frequency offset

Method used

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  • Decoding method of PUCCH and apparatus thereof
  • Decoding method of PUCCH and apparatus thereof
  • Decoding method of PUCCH and apparatus thereof

Examples

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Embodiment Construction

[0028] The uplink control channel PUCCH includes six formats: format 1 / 1a / 1b and format 2 / 2a / 2b. The following uses PUCCH format 2 as an example to describe this embodiment.

[0029] figure 1 It is a schematic diagram of the distribution of pilot bits and data bits of the uplink control channel PUCCH format 2 in the LTE system, where the uplink control channel uses a standard cyclic prefix (Normal CP), symbols 1 and 5 are pilot symbols, symbol 0, 2, 3, 4 and 6 are CQI data symbols.

[0030] figure 2 The method for decoding uplink control information in this embodiment includes:

[0031] Step 201, the network side solves the overall user data from the received data on the RB of the uplink control channel according to the Zadoff-Chu (ZC) sequence;

[0032] can be used formula to solve the overall user data from the received data, where, Y ant (n, l, t) is the received data in the frequency domain, ant=0,...AntNum-1 is the antenna index number, n=0,...,11 is the subcarrier...

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Abstract

The invention discloses a decoding method of a PUCCH and an apparatus thereof. The method is characterized in that: a network side analyzes overall user data from a receiving data of the PUCCH and separates independent user data of the each user from the overall user data; a reference pilot frequency symbol is determined for the independent user data, the reference pilot frequency symbol is taken as a reference to calculate a frequency offset estimation value of the pilot frequency symbol and the frequency offset estimation value is used to carry out frequency offset compensation to the other pilot frequency symbols except the reference pilot frequency symbol; the reference pilot frequency symbol of the each user and the other pilot frequency symbols after the frequency offset compensation are used to calculate a channel estimation value of each data symbol, a phase shift of a data symbol is calculated according to the frequency offset estimation value of the pilot frequency symbol and the channel estimation value of the data symbol is used to compensate the corresponding phase shift. By using the method and the apparatus of the invention, under the condition of the large phase shift, decoding performance can be improved to a great extent.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to a decoding method and device for an uplink control channel. Background technique [0002] The LTE (Long Term Evolution, long-term evolution) project is the evolution of 3G (third-generation mobile communication technology) and a transition between 3G and 4G. The technical goals of LTE can be summarized as: capacity improvement; coverage enhancement; mobility improvement , such as 0-15km / h has the best performance, 15-120km / h has high performance, supports 120-350km / h, even supports 500km / h in some frequency bands, etc. [0003] Fast movement will introduce a large Doppler frequency shift. At present, for the uplink control channel (PUCCH), multiple users are multiplexed on the same resource block (RB). To achieve high performance, however, as the mobile speed increases, when the user is in a high-speed mobile environment, the uplink decoding performance will...

Claims

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Application Information

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IPC IPC(8): H04L1/00H04L25/02H04L25/03
Inventor 李萍张娜
Owner SUZHOU ZHILVE INTELLECTUAL PROPERTY OPERATION CO LTD
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