A fixed-point detection method for srs signal in lte

A detection method and signal technology, applied in the field of LTE-A system, can solve problems such as inability to accurately reflect RB channel quality information of LTE frequency band, and achieve the effect of accurate noise and reduced overflow situation

Inactive Publication Date: 2018-06-19
WUHAN UNIV OF TECH
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the current floating-point simulation detection method cannot accurately reflect the channel quality information of each RB on the LTE frequency band, and proposes a method for SRS signal detection in LTE using a method based on interference cancellation for SRS receiver signal detection. The fixed-point detection method

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  • A fixed-point detection method for srs signal in lte
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  • A fixed-point detection method for srs signal in lte

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[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] The invention relates to the fixed-point receiving scheme of the SRS transmitter in the 3GPP TS36.211 (R9) protocol. Among them, the transmitter process is as follows figure 1 As shown, the detection method based on interference elimination is used for fixed-point design. The floating-point emulation of the receiving end is mainly to verify the feasibility of the algorithm, and in order to apply the algorithm to the specific fixed-point DSP hardware implementation, the present invention needs to select a suitable calibration scheme for the algorithm according to the data type length of DSP and FPGA Carry out fixed-point design. The purpose of fixed-point at the receiving end is to provide a basis for the realization of DSP products, and to compare the entry parameters and exit parameters during DSP software design to ensure t...

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Abstract

The present invention discloses a fixed point detection method aiming at an SRS (Sounding Reference Signal) in LTE (Long Term Evolution), comprising: 1) front-end processing; 2) channel estimation fixed point processing; 3) noise estimation fixed point processing; 4) calculation of a signal to noise ratio; and 5) time offset estimation fixed point processing. The fixed point detection method of the present invention overcomes the problem that channel quality information on each frequency range can not be accurately estimated in the prior art, thus frequency selective scheduling cannot be truly achieved. The fixed point detection method adopts a thought based on interference elimination to calculate the noise on the whole bandwidth, and at the same time, in order to ensure accuracy of estimation, the fixed point detection method adopts a transform-domain method to calculate a channel coefficient of each user, thereby ensuring that the obtained noise is more accurate. In order to facilitate engineering utilization, the fixed point detection method performs fixed point realization. As channel estimated values H are reduced or enlarged correspondingly, the channel estimated values H need to be adjusted to the same dimension for performing calculation when subtraction is performed. Data Y subjected to the front-end processing is used as reference for scaling, thereby reducing the occurrence of a situation of overflow.

Description

technical field [0001] The invention belongs to the technical field of LTE-A (Long Term Evolution Advance, mobile communication long-term evolution) system, specifically, for the transmitting end of the SRS link in 3GPP TS 36.211 (R9), a detection method based on interference elimination is adopted, A fixed-point detection method for SRS signals in LTE for fixed-point design of the receiving end. Background technique [0002] The LTE / LTE-A system detects the channel quality information of the uplink by defining SRS (Sounding Reference Signal, channel sounding reference signal), and then reports it to the resource scheduler as the main basis for uplink scheduling, so as to realize the frequency selectivity of uplink spectrum resources Scheduling to improve the throughput of the entire system; at the same time, SRS is also used for uplink synchronization control. The reference of uplink frequency selective scheduling and synchronization control is provided for the MAC layer t...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
CPCH04L27/2691
Inventor 刘可文田未巍熊红霞郭志强陈响林龚继华王明月
Owner WUHAN UNIV OF TECH
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