Design method of optimal pilot frequency pattern suitable for rapid time-varying sparse estimation

A design method and pattern design technology, applied in the field of channel estimation, can solve problems such as reducing the speed and quality of information transmission, and affecting the performance of communication systems

Active Publication Date: 2016-10-26
广州雄风信息技术有限公司
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If it cannot adapt to this change, the performance of the communication system will be ...

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  • Design method of optimal pilot frequency pattern suitable for rapid time-varying sparse estimation
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  • Design method of optimal pilot frequency pattern suitable for rapid time-varying sparse estimation

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[0089] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0090] In describing the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientations or positional relationships indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and It is not to indicate or imply that the device or element referred t...

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Abstract

The invention provides a design method of an optimal pilot frequency pattern suitable for rapid time-varying sparse estimation. The method is specifically characterized in that more and more testing experiments indicate that wireless channels have sparsity, and the design of the pilot frequency pattern at present is mainly based on a dense multipath conventional channel estimation method, a large number of pilot frequency signals are needed for obtaining accurate channel state information, and the utilization of frequency spectrum resources is low; in addition, the existing sparse channel estimating methods are mostly suitable for slow time-varying or time-invariant channels, the utilization of the channel sparsity is only limited to a time delay domain instead of a Doppler domain, and the influences of intercarrier interference generated by Doppler frequency shift on the channels can be neglected, so that the precision and reliability of the sparse channel estimation method used in the rapid time-varying channel are greatly lowered. Based on the above conditions, the invention provides the design method of the optimal pilot frequency pattern suitable for rapid time-varying sparse estimation, and the provided method is better in robustness and higher in channel estimation precision.

Description

technical field [0001] The present invention mainly relates to the field of channel estimation in fast time-varying channels, in particular to the field of sparse channel estimation methods based on pilot pattern design. Background technique [0002] With the development of wireless communication systems, especially the continuous improvement of mobile communication technology, higher requirements are put forward for data transmission rate, communication system performance and frequency bandwidth. Due to the limited space available spectrum resources of traditional modulation technology based on time division or frequency division , the communication quality of the system will fluctuate during high-speed transmission, so more advanced technology is urgently needed to further improve the utilization of frequency resources to meet the business needs of large capacity and high rate, and at the same time overcome the multiple problems of high-speed data in wireless channels. Pat...

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Application Information

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IPC IPC(8): H04L5/00H04L25/02H04L27/26
Inventor 廖勇周昕
Owner 广州雄风信息技术有限公司
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