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Method for transmitting uplink sounding reference signals in TDD system

A technology for sounding reference signals and reference signals, which is applied in the field of sending uplink sounding reference signals, can solve problems such as optimal scheduling, sounding signal interference, and inability to obtain full-band channel estimation at the base station side, so as to solve the problems of untimely measurement and mutual interference Effect

Active Publication Date: 2015-03-18
北京久华信信息技术有限公司
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Problems solved by technology

However, this method has the following problems: First, the data pilot usually only occupies a certain bandwidth, so the base station side cannot obtain the channel estimation of the whole frequency band, so that the optimal scheduling in the frequency domain cannot be performed
The ideal cross-correlation characteristics cannot be guaranteed between the Sounding signals of different lengths, resulting in different degrees of interference between the Sounding signals of different UEs.

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  • Method for transmitting uplink sounding reference signals in TDD system
  • Method for transmitting uplink sounding reference signals in TDD system
  • Method for transmitting uplink sounding reference signals in TDD system

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Embodiment Construction

[0028] The present invention proposes a method for uplink sounding reference signal, which can be used for TDD using Orthogonal Frequency Division Multiple Access (OFDMA) or Single Carrier Frequency Division Multiple Access (SC-FDMA) in the uplink In the wireless communication system, the auxiliary base station completes the measurement of the uplink channel quality of each terminal, and optimizes the scheduling scheme of the terminal. The technical solutions of the present invention will be further described below in conjunction with specific embodiments.

[0029] Take a TDD wireless communication system with a system bandwidth of 4 MHz and a symbol rate of 3.584 MHz as an example. The system bandwidth is evenly divided into M=7 subbands, and the bandwidth of each subband is 512KHz. Each subband is divided into K=32 subcarriers, and the interval between each subcarrier is 16KHz.

[0030] The basic reference signal uses a ZC (Zadoff–Chu) sequence with a length of 7, and the ...

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Abstract

The invention provides a method for transmitting uplink sounding reference signals in a TDD system. The method comprises the following steps: step A, a base station selects parameters needed for a terminal to transmit uplink sounding reference signals and configures the parameters for the terminal; and step B, the terminal generates an uplink sounding reference signal according to the received parameters, and transmits the uplink sounding reference signal in a fixed position of an uplink sub frame. By adopting the method of the invention, the problems such as incomplete sounding bandwidth, mutual interference between terminals under the same base station and untimely uplink channel information measurement are solved.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a method for sending an uplink sounding reference signal in a TDD (Time Division Duplex) system. Background technique [0002] In a wireless communication system, in addition to sending data signals between the terminal and the base station, it is usually necessary to send some known reference signals for estimating the state of the wireless channel and performing coherent demodulation. Especially in the time division duplex (TDD) system, since the uplink and downlink channels use the same frequency, the channel state has reciprocity, that is, through channel estimation of the received signal, in addition to being able to obtain the channel state of the link in this direction , the channel state estimation of the link in the reverse direction can also be obtained, which can provide reference for power control, resource scheduling, etc. [0003] When the system adopt...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00
CPCH04L5/0053
Inventor 杨海斌罗明胜高子龙林志坚
Owner 北京久华信信息技术有限公司
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