Orthogonal codebook-based receiving and transmitting joint hybrid precoding method for millimeter wave MIMO system

A precoding, millimeter wave technology, applied in transmission systems, radio transmission systems, transmission monitoring and other directions, can solve problems such as high complexity, and achieve the effect of reducing complexity, algorithm complexity, and feedback time

CN108880635AInactive Publication Date: 2018-11-23BEIJING UNIV OF POSTS & TELECOMM
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2018-11-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an orthogonal codebook-based receiving and transmitting joint hybrid precoding method for a millimeter wave MIMO system. The method comprises the steps that a, a model of a hybrid precoding problem of the millimeter wave MIMO system is built; b, the equivalent channel concept is introduced, an orthogonal codebook is designed, the hybrid precoding problem is transformed intoa maximum equivalent channel gain problem, and then analog precoding of a receiver and analog precoding of a transmitter are jointly designed; c, analog precodes of the receiver and the transmitter are set, and digital precoding of the receiver and digital precoding of the transmitter are jointly designed; and d, digital precodes and the analog precodes of the receiver and the transmitter are output. According to the method, by means of joint designing of the receiver and the transmitter, on one hand, the performance of obtaining the approximate digital precodes can be guaranteed, and on theother hand, channel information does not need to be fed back by the receiver to the transmitter, only the serial number of an analog precoding matrix in the codebook and the serial number of a digitalprecoding matrix in the codebook need to be fed back, the feedback time is shortened, and the implementability of the system is guaranteed.
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Description

technical field

[0001] The invention relates to the field of wireless communication, in particular to a method for joint hybrid precoding of transmitting and receiving in a millimeter-wave MIMO system based on an orthogonal codebook. Background technique

[0002] With the continuous progress and development of mobile smart terminals, the explosive growth of mobile data volume has aggravated the congestion of traditional frequency bands. In this context, in order to meet the high-speed and large-scale data requirements of future wireless communications, the millimeter-wave frequency band with sufficient spectrum resources has gradually become the focus of attention. However, severe path loss has become an urgent problem to be solved in millimeter wave communication research. Fortunately, the wavelength of the millimeter wave is short, and the corresponding antenna units can be densely arranged in a small space to form a large-scale antenna array. Therefore, the beam gain for...

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Embodiment Construction

[0032] 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.

[0033] The embodiment of the present invention adopts a single-user millimeter-wave MIMO system with a hybrid structure, and the antenna structure is a shared antenna structure. The sender has number of RF chains, N t root antenna; the receiving end has number of RF chains, N r Antennas, the transmitter and receiver pass through N s The relationship between the three data streams is: Such as figure 1 shown.

[0034] In order to solve the problem of hybrid precoding in millimeter-wave MIMO systems, we have designed a joint hybrid precoding method for transmitting and receiving in millimete...