Signal-to-interference ratio decision method in actual ICI (Inter-Carrier Interference) elimination of high-mobility OFDM (Orthogonal Frequency Division Multiplexing) cooperative system

A collaborative system and high-speed mobile technology, applied in transmission systems, multi-frequency code systems, wireless communications, etc., can solve problems such as difficult calculation of bit error rate and difficulty in knowing the degree of elimination

Inactive Publication Date: 2010-09-29
SHANGHAI UNIV
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Problems solved by technology

There are many ICI elimination algorithms currently being studied. The ICI elimination algorithm using Doppler diversity designed by Kim Byung-Chul and Lu I-Tai, the single frequency compensation algorithm, the joint estimation method, and the equa

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  • Signal-to-interference ratio decision method in actual ICI (Inter-Carrier Interference) elimination of high-mobility OFDM (Orthogonal Frequency Division Multiplexing) cooperative system
  • Signal-to-interference ratio decision method in actual ICI (Inter-Carrier Interference) elimination of high-mobility OFDM (Orthogonal Frequency Division Multiplexing) cooperative system
  • Signal-to-interference ratio decision method in actual ICI (Inter-Carrier Interference) elimination of high-mobility OFDM (Orthogonal Frequency Division Multiplexing) cooperative system

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Embodiment Construction

[0039] Embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0040] Such as figure 1 As shown, the SIR evaluation method in the actual elimination of ICI, the specific steps are as follows:

[0041] (1) Establish the signal-to-interference ratio model of the collaborative system capacity, and analyze the influence degree of the signal-to-interference ratio on the system capacity: suppose Y(m) and X(m) are the output and input signals of the OFDM system, and H(m) is the channel transmission function, W(m) is additive noise, then the signal at the receiving end can be expressed as:

[0042] Y ( m ) = H ( m ) X ( m ) S ( 0 ) + Σ k = ...

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Abstract

The invention discloses a signal-to-interference ratio decision method in actual ICI (Inter-Carrier Interference) elimination of a high-mobility OFDM (Orthogonal Frequency Division Multiplexing) cooperative system, which comprises the following steps of: (1) establishing a signal-to-interference ratio model of the capacity of the cooperative system, and analyzing the influence degree of the signal-to-interference ratio on the capacity of the system; (2) determining a value get method of the signal-to-interference ratio of the cooperative method according to a direct channel and the channel characteristics of the cooperative system; (3) calculating a signal-to-interference ratio range which can satisfy system performance requirements according to the signal-to-interference ratio model of the capacity of the cooperative system and the value get method of the signal-to-interference ratio; and (4) determining the elimination process of an elimination algorithm and evaluating the algorithm performance of the elimination algorithm according to the threshold of the signal-to-interference ratio. The method effectively solves the problem of the evaluation on elimination effect during the actual ICI elimination process by using the scheme of evaluating system performance by the signal-to-interference ratio, and the method greatly reduces calculation on the premise of having the same effect with a bit error index measurement elimination algorithm.

Description

technical field [0001] The invention relates to a signal processing method in wireless communication, in particular to a signal-to-interference ratio judgment method for eliminating interference between subcarriers in an OFDM cooperative system. Background technique [0002] According to the medium and long-term development plan of China's railways, by 2020, the mileage of China's high-speed railways with a speed of 200 kilometers per hour and above will exceed 18,000 kilometers, accounting for more than half of the total mileage of high-speed railways in the world. Therefore, the research on ground ultra-high-speed mobile broadband wireless communication system represented by high-speed railway has attracted more and more attention. Because the OFDM system has the advantages of high spectrum utilization rate and effective resistance to intersymbol interference (ISI), the OFDM broadband system can be used as an alternative for high-speed mobile communication systems. For OF...

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Application Information

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IPC IPC(8): H04W24/06H04W52/24H04L27/26H04B1/707H04B17/336
Inventor 彭章友刘艳艳张兴谢和平叶小乔
Owner SHANGHAI UNIV
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