Frequency domain position-confirming method and device of positioning reference signal

Abstract

The invention discloses frequency domain position-confirming method and device of a positioning reference signal. The method comprises the following step of: confirming a start physical resource block position h of a positioning reference signal on a time-domain orthogonal-frequency division multiplexing (OFDM) signal according to the following formula, wherein h is equal to NRB-N<PRS>RB or floor((NRB-N<PRS>RB) / 2), NRBDL presents a downlink configured bandwidth by using continuous subcarriers in a frequency domain as a unit, NRBPRS is a PRS bandwidth, and [] presents downward rounding. The invention ensures the whole performance of the system.

Description

technical field [0001] The present invention relates to the field of communications, in particular to a method and device for determining a position in the frequency domain of a positioning reference signal. Background technique [0002] Orthogonal Frequency Division Multiplexing (OFDM for short) technology is essentially a multi-carrier modulation communication technology, which is one of the core technologies in the fourth generation mobile communication. In the frequency domain, the OFDM multipath channel exhibits frequency-selective fading characteristics. In order to overcome this fading, the channel is divided into multiple sub-channels in the frequency domain. The spectral characteristics of each sub-channel are approximately flat, and each sub-channel of OFDM The channels are orthogonal to each other, so the spectrums of the sub-channels are allowed to overlap each other, so that the spectrum resources can be utilized to the greatest extent. [0003] The Long Term E...

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Problems solved by technology

[0033] When N RB DL -N RB PRS When is an odd number, the starting physical resource block position h of the positioning reference signal PRS on the time-domain orthogonal frequency division multiplexing OFDM symbol is based on h = ( N RB DL - N RB PRS ) / 2 , due to N RB DL -N RB PRS is an odd number, and the starting physical resource block position is determined in units of 0.5 RB. Therefore, there is only one PRS in the first PRB and the last PRB where the PRS is located in a PRS time-domain OFDM symbol, and the other PRS There are two PRSs in each PRB, which will lead to uneven distribution of PRSs. In addition, since the resource allocation of the physical downlink shared channel (PDSCH) is performed in units of resource blocks, this also affects The scheduling of PDSCH causes the overall performance of the system to decline

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