Auxiliary pilot method used for FBMC (Filter Bank Multicarrier) system channel estimation

A multi-carrier system and auxiliary pilot technology, applied in channel estimation, baseband system components, etc., can solve the problems that the receiver cannot accurately restore the transmitted signal, channel value deviation, etc., and achieve the effect of eliminating inherent interference and accurate channel estimation

Inactive Publication Date: 2015-09-30
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

Due to the existence of interference in FBMC, FBMC cannot perform pilot setting and channel estimation like OFDM, because traditional pilot design and channel estimation methods cannot eliminate interference, and the estimated channel value will be seriously deviated, resulting in the receiver being unable to accurately resume transmission Signal

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  • Auxiliary pilot method used for FBMC (Filter Bank Multicarrier) system channel estimation
  • Auxiliary pilot method used for FBMC (Filter Bank Multicarrier) system channel estimation
  • Auxiliary pilot method used for FBMC (Filter Bank Multicarrier) system channel estimation

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Embodiment Construction

[0024] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0025] Neglecting channel and noise effects, for an ideal FBMC-OQAM system, the received signal and transmit signal d k,n The relationship is as follows:

[0026] x k 0 , n 0 = Σ k ∈...

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Abstract

FBMC (Filter Bank Multicarrier) is a special carrier communication mode. Being different from OFDM (Orthogonal frequency division multiplexing), subcarriers of the FBMC are not orthogonal to one another, so that intersymbol interference and inter-carrier interference naturally exist. A traditional OFDM channel estimation method is built on the basis of no intersymbol interference and inter-carrier interference, thereof, to carry out accurate channel estimation, the interference of surrounding symbols to a pilot symbol must be eliminated, and surrounding interference factors are definite under a certain filter bank structure and a prototype filter design. An auxiliary pilot method is such a method that an auxiliary pilot is placed nearby the position of an actual pilot, the value of the auxiliary pilot is determined by virtue of the values of the surrounding symbols and the corresponding interference factors, and the interference of the surrounding symbols to the pilot position is eliminated by virtue of the auxiliary pilot, so as to carry out accurate channel estimation.

Description

technical field [0001] The invention belongs to the technical field of multi-carrier communication in wireless communication, and more specifically relates to an auxiliary pilot method for channel estimation of a filter bank multi-carrier system. Background technique [0002] Multicarrier modulation is an efficient transmission technique. With multi-carrier modulation, the available channel is divided into several parallel sub-channels, each sub-channel has a sub-carrier associated with it. The transmitter can effectively convert several parallel low-rate input signals into one high-rate signal, which is then transmitted in the channel. On the other hand, the receiver must be able to reconstruct the low-rate signal completely or to a good approximation. The analysis-by-synthesis filter bank, or the Transmutiplexer (TMUX) structure, is the core component of the multi-carrier system. A synthesis filter bank (SFB) consists of a set of parallel transmit filters, while an anal...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02
CPCH04L25/0202H04L25/024
Inventor 王德胜常成龙熊磊夏鹏敏万晨刘文旭
Owner HUAZHONG UNIV OF SCI & TECH
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