Method for generating ACK/NACK (Acknowledge Character/Non-Acknowledgement) signal

A signal and time-domain signal technology, which is applied in the field of ACK/NACK signal generation, can solve problems such as the ACK/NACK signal generation method that has not been proposed, and achieve the effect of low complexity and simple steps

Inactive Publication Date: 2012-10-17
POTEVIO INFORMATION TECH CO LTD
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Problems solved by technology

A method for generating ACK / NACK signals suitable for power grid systems has not yet been proposed

Method used

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  • Method for generating ACK/NACK (Acknowledge Character/Non-Acknowledgement) signal
  • Method for generating ACK/NACK (Acknowledge Character/Non-Acknowledgement) signal
  • Method for generating ACK/NACK (Acknowledge Character/Non-Acknowledgement) signal

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Embodiment Construction

[0017] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] In a subband of the power grid system, the PUCCH channel occupies the first 4 symbols of a subframe numbered 2 in a radio frame. A subframe includes 9 symbols, and each symbol corresponds to 10 effective subcarriers. figure 1 The PUCCH channel structure is given. The ACK / NACK signal occupies two symbols, corresponding to the first and fourth symbols, represented by blank squares; the PUCCH demodulation reference symbols correspond to the second and third symbols, represented by striped squares.

[0019] The core idea of ​​the present invention is: based on the channel structure of the PUCCH in the power grid system, only one ACK / NACK signal is sent for one subframe and there is no feature of multi-user multiplexing to generate the...

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Abstract

The invention provides a method for generating an ACK / NACK (Acknowledge Character / Non-Acknowledgement) signal. The method comprises the following steps of: mapping ACK / NACK information to be transmitted at present into a symbol corresponding to a constellation point, wherein the symbol obtained after mapping the ACK information is -1 and the symbol obtained after mapping the NACK information is 1; shortening a zadoff-chu sequence into a sequence of which the length is N<RB>SC as a spread spectrum base sequence, and the N<RB>SC is an effective sub-carrier number of a sub-band; for each OFDM (Orthogonal Frequency Division Multiplexing) symbol which is occupied by the ACK / NACK information on a physical uplink channel (PUCCH), determining a circulation displacement value of the spread spectrum base sequence corresponding to the OFDM symbol; carrying out circulation displacement to the spread spectrum base sequence according to the circulation displacement value; multiplying each element in the spread spectrum base sequence after the circulation displacement with the symbol after the mapping; and converting the sequence obtained from the multiplication into a time domain signal. The method is applicable for a power grid system.

Description

technical field [0001] The invention relates to wireless communication technology, in particular to a method for generating ACK / NACK signals. Background technique [0002] In the current power network design, the spectrum is discretely distributed in the 230M frequency band, which can be divided into 40 discontinuous sub-bands of 25kHz, the lowest frequency sub-band is 223.525MHz, and the highest frequency sub-band is 231.65MHz. In the power grid system, a multi-channel OFDM system is used for network coverage. The multi-channel OFDM system adopts Orthogonal Frequency Division Multiplexing (OFDM) as the basic technology, and each channel is a subband carrying effective information. A user can occupy one subband or multiple subbands for service transmission and reception. [0003] In order to improve the reliability and throughput of the system, the power grid system introduces HARQ technology. The receiving end of the network feeds back the ACK / NACK information of the rec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04L1/18
Inventor 闫亮王单冯绍鹏
Owner POTEVIO INFORMATION TECH CO LTD
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