Angle-time delay domain pilot frequency multiplexing broadband mass MIMO (multiple input multiple output) communication method

A communication method and pilot multiplexing technology, applied in the direction of multi-frequency code system, baseband system components, etc., can solve the problems of large pilot overhead and high implementation complexity, reduce pilot overhead, improve robustness, The effect of improving accuracy

Active Publication Date: 2014-12-17
SOUTHEAST UNIV
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Problems solved by technology

For massive multi-user MIMO-OFDM wireless communication systems, there are a large number of channel parameters to be estimated, which will lead to a large amount of pilot overhead
At the same time, linear minimum mean square er

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  • Angle-time delay domain pilot frequency multiplexing broadband mass MIMO (multiple input multiple output) communication method
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  • Angle-time delay domain pilot frequency multiplexing broadband mass MIMO (multiple input multiple output) communication method

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Embodiment Construction

[0032] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0033] 1. System configuration, transmission signal frame structure and communication process

[0034] In a multi-cell cellular system, each cell base station is configured with a large-scale antenna array containing more than dozens of antenna units, and the large-scale antenna array can adopt one of various array structures such as a li...

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Abstract

The invention provides an angle-time delay domain pilot frequency multiplexing broadband mass MIMO (multiple input multiple output) communication method. The method includes that a base station wirelessly communicates with multiple subscribers on each subcarrier; a probe sequence of each subscriber is generated via a same constant modulus sequence by means of frequency domain modulation, the different subscribers send uplink probe signals on multiple subcarriers of one or more continuous OFDM (orthogonal frequency division multiplexing) symbols simultaneously, and the base station acquires angle-time delay domain two-dimensional statistics channel information according to the uplink probe signals and determines pilot frequency modulation factors of all the subscribers according to the angle-time delay domain two-dimensional statistics channel information; a pilot frequency sequence of each subscriber is generated via the same constant modulus sequence by means of frequency domain modulation, the different subscribers send uplink pilot frequency signals on the multiple subcarriers of the one or more continuous OFDM symbols simultaneously, and the base station acquires channel estimation values of a pilot frequency band and a data segment of each subscriber according to the uplink pilot frequency signals; on each subcarrier, the base station implements uplink and downlink robust transmission according to the channel estimation values and estimation error space correlation matrixes. By the method, system pilot frequency overhead can be lowered, and system frequency spectrum and power efficiency is improved.

Description

technical field [0001] The invention relates to a wideband massive MIMO wireless communication method using multiple antennas, in particular to a wideband massive MIMO wireless communication method for angle-delay domain pilot multiplexing. Background technique [0002] The massive MIMO wireless communication technology equipped with a large-scale antenna array on the base station side can deeply utilize the spatial dimension resources of the wireless channel. Compared with the traditional small-scale MIMO technology, it can further improve the effectiveness and reliability of the wireless communication system. widespread attention in the world. The actual wireless propagation channels are all broadband channels, and Orthogonal Frequency Division Multiplexing (OFDM) technology can decompose the broadband channel into multiple parallel narrowband channels. Massive MIMO combined with OFDM is one of the development trends of the next generation broadband mobile communication sy...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04L25/02
Inventor 高西奇尤力仲文江彬
Owner SOUTHEAST UNIV
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