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Channel estimation method for double-antenna generalized multi-carrier system

A multi-carrier system and channel estimation technology, which is applied in the field of channel estimation for uplink dual-antenna discrete Fourier spread spectrum generalized multi-carrier systems, and can solve problems such as poor performance and no use of frequency domain characteristics.

Inactive Publication Date: 2008-07-16
SHANGHAI JIAO TONG UNIV +1
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Problems solved by technology

Although this method can be directly applied to dual-antenna generalized multi-carrier systems, it does not take advantage of the frequency domain characteristics of the system itself and has poor performance.

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  • Channel estimation method for double-antenna generalized multi-carrier system
  • Channel estimation method for double-antenna generalized multi-carrier system
  • Channel estimation method for double-antenna generalized multi-carrier system

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Embodiment Construction

[0017] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0018] The specific steps of the channel estimation method of the dual-antenna generalized multi-carrier system of the present invention are as follows:

[0019] 1. Frequency-domain pilot allocation, the subcarriers of the two pilot blocks included in the system frame structure are allocated according to the data mapping manner. Let the number of subcarriers of one of the pilot blocks be M p , where the non-zero subcarriers are N p , assign pilot subcarriers to K non-zero subbands, then each subband occupies Q=N p / K subcarriers, corresponding to the kth subband, the subcarriers are

[0020] P k =[p(k,0)p(k,1)...p(k,q)...p(k,Q-1)] T

[0021] For all M subbands (including non-zero subbands and zero subbands), the pilot subcarrier vectors are allocated according to the mapping positions of the data subbands, and the mapping positions of th...

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Abstract

The invention relates to a channel estimation method for a dual-antenna generalized multi-carrier system, wherein, according to a time-frequency structure of frame data stipulated by a system, a pilot subcarrier is assigned according to the position of a special subband, while a null carrier is assigned by a non-special subband. During the transmission of frame data, the pilot orthogonality of two transmitting antennas are rationally designed under the condition of slow channel time variation, two pilot blocks in one frame are used to jointly make a channel estimation to make the channel estimation problem to convert into the solution of a linear equation group, a channel frequency response estimation value at the position of the special subband can be obtained through the linear treatment, the position of the non-special subband is not estimated, thus the pilot resource is saved, and other frequency-division multiplexing access multi-user systems are easy to be reached, ie. orthogonal frequency division multiplexing access system and single-carrier frequency division multiplexing access system.

Description

technical field [0001] The invention relates to a channel estimation method for a dual-antenna generalized multi-carrier system, in particular to a channel estimation method for an uplink dual-antenna discrete Fourier spread spectrum generalized multi-carrier system. The invention belongs to the technical field of signal processing in wireless communication. Background technique [0002] The Discrete Fourier Transform-Spread-Generalized Multi-Carrier (DFT-S-GMC for short) system is an uplink transmission technology. This system is essentially a single-carrier frequency division multiplexing system. It uses DFT spread spectrum mapping to map user data to specific sub-band positions according to the specified mapping mode, and then modulates the data to different sub-band positions through generalized multi-carrier modulation. subbands, so that different users can realize multi-user frequency division multiplexing access by allocating different subbands (ZHANG Xiao-dong, LI M...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04B7/26
Inventor 蒋铃鸽耿烜何晨熊勇李明齐
Owner SHANGHAI JIAO TONG UNIV
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