Method and apparatus for sending physics uplink control signal in TDD system

A time-division duplex system and control signal technology, applied in the field of communication, can solve the problem of high PAR, achieve the effect of solving high PAR, meeting performance requirements and coverage requirements

Active Publication Date: 2008-07-23
ZTE CORP
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Problems solved by technology

[0014] The present invention aims to provide a method and device for sending physical uplink control signals in a TDD sy

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  • Method and apparatus for sending physics uplink control signal in TDD system
  • Method and apparatus for sending physics uplink control signal in TDD system
  • Method and apparatus for sending physics uplink control signal in TDD system

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Embodiment Construction

[0026] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0027] Figure 2 is used to send the format 2 of the PUCCH (that is, the channel quality indicator CQI (Channel Quality Indicator)). In the schematic diagram, a 1 ms PUCCH includes two 0.5 ms time slots, and the two time slots are respectively located in the upper and lower frequency bands of the system bandwidth in the frequency domain. When the PUCCH uses a conventional cyclic prefix, 7 symbols are included in the 0.5ms time slot, numbered #0-#6, and each symbol includes 12 subcarriers in the frequency domain. Among them, 7 symbols numbered #1 and #5 are used to send reference signals, and 5 symbols #0, #2 to #4 and #6 are used to send CQI information to be carried. The PUCCH reference signal structure 2 shown in Figure 2 is used to carry CQI information, assuming that the CQI bit information to be sent is M, and the sending proces...

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Abstract

The invention provides a method and a device for sending physical uplink control signals in a time-division duplex system, the method comprises following steps: encoding the uplink control signals with a communication channel to obtain coded bits, modulating the coded bits with QPSK to obtain modulation symbols, transforming the modulation symbols with DFT to obtain symbols on a frequency domain,expanding the symbols on the frequency domain with time-domain through adopting a CAZAC root sequence to respectively obtain a first signal and a second signal which are sent on two time slots, mapping the first signal and the second signal on an information symbol which is corresponded with a PUCCH reference signal structure 2, and combining the information symbol and the reference signal into asignal which will be sent by a sub-frame. The invention can well satisfy the performance requirement and the covering requirement that a plurality of ACK/NACK can be sent on an uplink sub frame.

Description

technical field [0001] The present invention relates to the field of communications, in particular to a method and device for sending physical uplink control signals in a time division duplex system. Background technique [0002] The rapid development of digital communication systems puts forward higher requirements for the reliability of data communication. However, under harsh channels, especially in high data rate or high-speed mobile environments, serious problems such as multipath interference and Doppler shift Effective error control technology, especially Hybrid Automatic Repeat Request (HARQ) technology has become a research hotspot in the field of communication. [0003] In the HARQ mode, the code sent by the originator can not only detect errors, but also have certain error correction capabilities. After receiving the code word, the decoder at the receiving end first checks the error situation. If it is within the error correction capability of the code, it will a...

Claims

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Application Information

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IPC IPC(8): H04B7/26H04Q7/38H04L1/00H04L27/26
Inventor 夏树强梁春丽郝鹏戴博
Owner ZTE CORP
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