A fixed-point detection method for srs signal in lte

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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