Large-scale MIMO beam delay Doppler domain statistical channel information acquisition method
A technology for statistical channel information and acquisition methods, applied in the field of statistical channel information acquisition in the massive MIMO beam delay Doppler domain, can solve the problems of unsatisfactory computational complexity of the M-FOCUSS method and high dimensionality of the MMV problem
Active Publication Date: 2022-06-24
SOUTHEAST UNIV
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In addition, the dimensionality of the MMV problem in the considered massive MIMO is too high, the computational complexity of the M-FOCUSS method is not satisfactory, and the M-FOCUSS method needs to acquire instantaneous channel information
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[0039] The technical solutions provided by the present invention will be described in detail below with reference to specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and not to limit the scope of the present invention.
[0040] like figure 1 As shown, the method for obtaining a priori statistical channel information in the Doppler domain of massive MIMO beam delay based on pilot signals disclosed in the embodiment of the present invention includes: each mobile terminal sends a pilot signal on the same time-frequency resource; The pilot signals received in each time slot are converted into the beam delay Doppler domain; the multi-user beam delay Doppler domain prior statistical channel information is obtained by using the beam delay Doppler domain sample statistics; The multi-user beam delay Doppler domain a priori statistical channel information restores the beam delay Doppler domain a prior...
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The invention discloses a large-scale MIMO beam delay Doppler domain statistical channel information acquisition method, and a beam delay Doppler domain channel model involved in the disclosed method is based on a refined sampling steering vector matrix, and is closer to a physical channel model than a traditional beam domain channel model based on a DFT matrix. The invention provides a method for acquiring priori statistical channel information and posterior statistical channel information in a large-scale MIMO beam delay Doppler domain, and the method for acquiring the priori statistical channel information comprises a method for acquiring the priori statistical channel information based on a pilot signal and a method for acquiring the priori statistical channel information under the condition of known instantaneous channel information. The posterior statistical channel information comprises a posterior channel mean value and variance information. The method provided by the invention has relatively low complexity, can be applied to an actual large-scale MIMO system, provides support for channel estimation and robust precoding transmission methods, and has relatively high application value.
Description
technical field [0001] The invention belongs to the technical field of communication, and relates to a method and a system for obtaining statistical channel information in a massive MIMO beam delay Doppler domain. Background technique [0002] Massive Multiple-Input Multiple-Output (MIMO, Multiple-Input Multiple-Ouput) is one of the key technologies of 5G wireless communication network. Massive MIMO greatly improves the system capacity by using a large number of antennas at the base station (BS, Base Station) and makes full use of the spatial dimension resources. In massive MIMO systems, multi-user MIMO (MU-MIMO) transmission on the same time and frequency resources is significantly enhanced. For the antenna array equipped on the base station side, Uniform Plane Array (UPA, Uniform Plane Array) has been widely used in practical massive MIMO systems due to its compact size. [0003] For massive MIMO systems, a commonly used channel statistical model in the literature is a t...
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Login to View More IPC IPC(8): H04B7/0413H04B7/0456H04L25/02
CPCH04B7/0413H04B7/0456H04L25/0224
Inventor 卢安安高西奇陈衍章宇轩
Owner SOUTHEAST UNIV