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Method and system for estimating carrier interference noise ratio
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A carrier interference and interference noise technology, applied in the field of communication, can solve the problems of inaccurate measurement of CINR, poor effect of frequency selective fading channels, etc., and achieve the effect of overcoming measurement inaccuracy and improving measurement accuracy
Active Publication Date: 2013-08-07
南通艾森传感技术有限公司
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[0008] The present invention is proposed for the problem that the CINR cannot be accurately measured and the effect is poor in the frequency selective fading channel when the signal-to-noise ratio is low. Therefore, the main purpose of the present invention is to provide a CINR estimation method and system to solve the above problems at least one
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Embodiment 1
[0036] Figure 4 It is a flow chart of the signal-to-noise ratio processing method according to the first preferred embodiment of the present invention. like Figure 4 As shown, the signal-to-noise ratio processing method according to the first preferred embodiment of the present invention mainly includes the following steps (step S402-step S410):
[0037] Step S402: Group the m pilot subcarriers carrying the pilot on one symbol, and take the first 35 pilot subcarriers of the 36 pilot subcarriers as a group, denoted as S 1 (i), take the second pilot subcarrier to the 36th pilot subcarrier as another group, denoted as S 2 (i), wherein, i=1,...,35, calculated according to the following formulas (1), (2),
[0038]S 1 (i)=S(i)=R(i) (1)
[0039] S 2 (i)=S(i+1)=R(i+1) (2)
[0040] Among them, R(i) is the channel response value of the i-th subcarrier.
[0041] Step S404: Suppose Y(j) is the pilot signal received on the jth subcarrier, X(j) is the pilot signal sent on the jth ...
Embodiment 2
[0054] Figure 5 It is a flow chart of the signal-to-noise ratio processing method according to the second preferred embodiment of the present invention. like Figure 5 As shown, the signal-to-noise ratio processing method according to the second preferred embodiment of the present invention mainly includes the following steps (step S502-step S510):
[0055] Step S502: group the m pilot subcarriers carrying the pilot on one symbol, and take the first 35 pilot subcarriers of the 36 pilot subcarriers as a group, denoted as S 1 (i), take the second pilot subcarrier to the 36th pilot subcarrier as another group, denoted as S 2 (i), wherein, i=1,...,35, calculate according to formula (1), (2),
[0056] S 1 (i)=S(i)=R(i), (1)
[0057] S 2 (i)=S(i+1)=R(i+1) (2)
[0058] where R(i) is the channel response value of the i-th subcarrier
[0059] Step S504: Assume that Y(j) is the pilot signal received on the jth subcarrier, X(j) is the pilot signal sent on the jth subcarrier, and...
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Abstract
The invention provides a method and a system for estimating a carrier interference noise ratio (CINR). The method for estimating the CINR according to the invention comprises the following steps of: taking a first pilotsubcarrier to an (m-1)th pilotsubcarrier of m pilot subcarriers for carrying pilot on a symbol as a first group of pilot subcarriers, and taking a second pilot subcarrier to an mth pilot subcarrier of the m pilot subcarriers as a second group of pilot subcarriers, wherein m is a natural number which is more than or equal to 2; determining signal power and interference noise power of the pilot subcarriers according to channel response values of each group of pilot subcarriers; and determining the CINR according to the signal power and the interference noise power. The method and the system for estimating the CINR of the invention overcome the disadvantages of inaccurate measurement of CINR for calculating the carrier interference ratio at a low signal-to-noise ratio inthe prior art, improve the measurement accuracy of the CINR in a frequency selective fading channel and provides reliable guarantee for downlink resource distribution.
Description
technical field [0001] The present invention relates to the communication field, in particular to a carrier interference noise ratio (Carrier Interference Noise Ratio, CINR for short) estimation method and system. Background technique [0002] In the Long Term Evolution (referred to as LTE) system, the uplink transmission scheme adopts a single carrier frequency division multiple access system (Single Carrier-Frequency Division Multiple Access, referred to as SC-FDMA) with a cyclic prefix, In the SC-FDMA system, uplink users can be orthogonal to each other in the frequency domain, and effective frequency domain equalization can be obtained on the receiver side, thereby reducing the peak-to-average power ratio of the transmitting terminal. [0003] In a wireless communication system, CINR is one of the important parameters reflecting the channel quality of a propagation path between a transmitter and a receiver. On the data symbols received by the receiving end, the total po...
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