Three-dimensional training codebook design method and beam alignment method for millimeter wave communication system

Abstract

The invention discloses a three-dimensional training code book design method for a millimeter wave communication system and a wave beam alignment method. The three-dimensional training code book design method comprises the following steps of: 1, according to ranges of a resolution and a wave beam space (with reference to the specification), establishing a three-dimensional training code book tree structure with a depth of S and a degree of N; 2, equally dividing (with reference to the specification) into N rectangular regions (with reference to the specification), and denoting as a set (with reference to the specification), wherein (with reference to the specification) has a wave beam set (with reference to the specification) for corresponding, and a root node of the tree structure is a combination of (with reference to the specification) and (with reference to the specification); 3, determining a b node Cs,b in an s layer, and sequentially determining each node (with reference to the specification) in second to S layers, wherein Cs,b is a combination of (with reference to the specification) and a wave beam set (with reference to the specification); and 4, solving a wave beam forming vector (with reference to the specification) which the wave beam set corresponding to each node comprises so as to obtain the three-dimensional training code book, wherein q=1,..., N. The three-dimensional training code book generated by the method can be used for implementing high-accuracy wave beam alignment and channel estimation, and can obviously reduce training cost of the system.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a design method of a three-dimensional training codebook for a millimeter-wave communication system in which antennas at a transmitting and receiving end are arranged in a uniform array. Background technique [0002] With the continuous development of wireless communication technology, the demand for high-speed data services and ubiquitous access is showing an explosive growth. The next generation of 5G mobile communication technology will have higher and higher demands on capacity, energy consumption and bandwidth. The millimeter wave communication technology working in the relatively idle frequency band of 30-300GHz is considered to be one of the key technologies for the next generation of wireless local area network and mobile communication because of the large amount of unlicensed bandwidth contained in the working frequency band, because the direct...

AI Technical Summary

Problems solved by technology

First of all, the high frequency band of the millimeter wave band means that the channel may change rapidly in a short period of time, and the beam alignment needs to be completed within a very short channel coherence time, so the exhaustive beam search algorithm is not applicable here

Second, in order to make full use of the array gain of a large antenna array, the training beam should be narrow enough, which will undoubtedly increase the complexity of beam alignment, so it is necessary to propose an efficient beam codebook design method and beam search algorithm

There have been many studies on hierarchical codebook design methods, but these studies mainly focus on the uniform linear array (ULA) structure, while there are very few studies on the uniform planar array (UPA) structure

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