Super-resolution angle and time delay estimation based broadband channel estimation method

A technology of super-resolution and delay estimation, applied in channel estimation, baseband system, baseband system components, etc., can solve problems such as quantization error

Active Publication Date: 2018-12-04
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0006] In view of this, the present invention provides a wideband channel estimation method based on super-resolution angle and time delay estimation to solve the probl

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  • Super-resolution angle and time delay estimation based broadband channel estimation method
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  • Super-resolution angle and time delay estimation based broadband channel estimation method

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Embodiment Construction

[0048] The basic idea of ​​the present invention is to use the sparsity of the millimeter wave channel, and by designing the training signal at the transceiver end, the pilot overhead required for channel estimation can be greatly reduced, and a low-dimensional equivalent channel that retains the shift invariance of the array response can be obtained , and then by jointly using the information of multiple subcarriers in the OFDM system to process the received signal, the three-dimensional unitary ESPRIT (Estimating Signal Parameters via Rotational Invariance Techniques) algorithm in the classical spatial spectrum estimation can be used To estimate the angle of arrival, angle of departure, and super-resolution estimation of the corresponding delay in the wideband millimeter-wave MIMO channel with high precision, and reconstruct the original frequency domain channel with the estimated angle and delay information, Therefore, the accuracy of channel estimation is significantly impr...

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Abstract

The invention discloses a super-resolution angle and time delay estimation based broadband channel estimation method. According to the invention, aiming at a millimeter wave large scale MIMO system ina hybrid analog-digital coding architecture, in order to solve a problem of quantization error influence due to limited quantization angle grid resolution in a traditional compression sensing based broadband channel estimation method, sparsity of a millimeter wave channel it utilized, through designing training signals of a transceiving end, a classical spatial spectrum estimation method is introduced, so that pilot frequency expenditure required by channel estimation can be reduced substantially and an arrival angle and a leaving angle of the millimeter wave channel and a super resolution estimation value of corresponding multi-path time delay can be acquired with high accuracy. Therefore, channel estimation accuracy can be improved distinctively. Besides, according to the invention, phases of a phase shifter in a phase shift network corresponding to an analog pre-encoder and an analog combiner to limited quantization bits, so that practical system implementation is facilitated.

Description

technical field [0001] The invention relates to the field of channel estimation in mobile communication, in particular to wideband channel estimation based on super-resolution angle and time delay estimation in a millimeter-wave massive MIMO system under a hybrid analog-digital precoding architecture. Background technique [0002] With the explosive growth of mobile traffic services, it is foreseeable that the current LTE / LTE-A-based 4G mobile cellular network will find it increasingly difficult to meet this geometrically increasing capacity demand. Millimeter-wave massive MIMO (Multiple-Input Multiple-Output) technology is widely regarded as one of the key technologies in the physical layer to achieve the grand vision of a thousand-fold increase in communication network capacity. First of all, the millimeter wave frequency band (30-300GHz) has abundant spectrum resources, which can effectively alleviate the current shortage of spectrum resources. Secondly, the shorter wave...

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Application Information

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IPC IPC(8): H04L25/02H04B7/0456
CPCH04B7/0456H04L25/0204H04L25/0212H04L25/0224
Inventor 高镇廖安文杨凯王华
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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