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Game theory-based MIMO channel tracking method

A channel tracking and game theory technology, which is applied in the field of MIMO channel tracking based on game theory, can solve the problems of particle degradation, large calculation amount of particle filter algorithm, weakening the advantages of particle filter algorithm, etc., and achieve good channel tracking accuracy and good noise robustness. sticky effect

Inactive Publication Date: 2010-04-21
HUNAN UNIV
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Problems solved by technology

The calculation of the particle filter algorithm is very large, and the phenomenon of particle degradation will occur during the iterative process. This phenomenon causes a large amount of calculation work to be used to update the particles that have little effect on the estimation of the importance function; at the same time, the model's Uncertainty and incomplete information also weaken the advantages of the particle filter algorithm

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  • Game theory-based MIMO channel tracking method

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Embodiment 1

[0020] The technical scheme of the present invention is, the step of described a kind of MIMO channel tracking algorithm based on game theory is:

[0021] 1. Transmit a pilot signal, perform channel estimation through the pilot signal, and use the channel estimation value as the initial value of tracking;

[0022] 2. Modeling MIMO channel noise as a game opponent;

[0023] 3. Decompose the tracking error and determine the tracking objective function;

[0024] 4. Solve the saddle point of the objective function through game theory to realize channel tracking.

[0025] The present invention is further described below.

[0026] The invention proposes a MIMO channel tracking algorithm based on game theory. The algorithm models noise as a game opponent (relative to an estimator), and the noise sequence generated by the game opponent includes two parts: random noise and deterministic estimation error. The goal of noise is to maximize the MIMO channel tracking error, while the goa...

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Abstract

The invention discloses a game theory-based MIMO channel tracking method, which comprises the following steps: transmitting a pilot signal, performing channel estimation through the pilot signal and taking a channel estimation value as an initial value of tracking; modeling MIMO channel noise serving as a game opponent; resolving a tracking error and determining a tracking target function; and solving saddle points of the target function through the game theory to realize channel tracking. The method combines the game theory and the MIMO channel tracking method, thereby having high tracking accuracy.

Description

technical field [0001] The invention belongs to the field of game theory and communication technology, and relates to a MIMO channel tracking method based on game theory. Background technique [0002] MIMO (multiple-input multiple-output, multiple-input and multiple-output) technology uses multiple antennas at both the transmitting end and the receiving end, and uses diversity technology to effectively overcome multipath fading. Since channel information is required for demodulation, decoding, and link adaptation in MIMO systems, channel estimation has a great impact on system performance. There have been many studies on channel estimation algorithms for MIMO systems, which can be basically divided into two types, blind channel estimation and pilot-aided channel estimation. Blind channel estimation is relatively simple to implement but the performance is not ideal. Pilot estimation estimates the channel by periodically transmitting training sequences. This method needs to i...

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Application Information

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IPC IPC(8): H04B7/02
Inventor 曾凡仔刘洁李仁发罗娟肖玲
Owner HUNAN UNIV
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