Fixed point detection method aiming at SRS 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 (LongTermEvolutionAdvance, long-term evolution of mobile communication) system, specifically, for the transmitting end of the SRS link in 3GPPTS36.211 (R9), the detection method based on interference elimination is adopted to perform the receiving end A fixed-point detection method for SRS signals in LTE based on fixed-point design. Background technique [0002] The LTE / LTE-A system detects uplink channel quality information by defining SRS (SoundingReferenceSignal, channel sounding reference signal), and then reports it to the resource scheduler as the main basis for uplink scheduling, so as to realize frequency selective scheduling of uplink spectrum resources. Improve the throughput of the entire system; at the same time, the SRS is also used for uplink synchronization control. The reference of uplink frequency selective scheduling and synchronization control is provided for the MAC layer throug...

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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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