Hierarchical codebook structure design method of joint method

A structure design and codebook technology, applied in the field of hierarchical codebook structure design, to achieve the effects of good robustness, simple system design, and fast convergence rate

Active Publication Date: 2016-09-21
BEIHANG UNIV
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Problems solved by technology

[0005] In order to solve the efficiency problem of codebook search, the present invention provides a hierarchical codebook structure design method based on a joint method to make the total transmission power smaller, the power utilization rate higher, and the anti-interference performance better

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Embodiment Construction

[0032] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0033] Without loss of generality, the present invention assumes that the spacing between antenna elements in the uniform antenna array (Uniformly Linear Antenna, ULA) at the transceiver end in the millimeter wave communication model is half a wavelength, and the number of antennas at the transceiver end is N R and N T . like figure 1 As shown, only one radio frequency link (RF Chain) is connected to the ULA. At the transmitting end, each antenna unit is connected to a phase shifter and an amplifier (PA), and at the receiving end, each antenna is connected to a low noise amplifier (Low Noise Amplifier, LNA). In addition, it should be noted that each antenna unit can be turned on or off independently, and each antenna unit has the same magnification.

[0034] Let s be the sent signal, and the expression of the rec...

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Abstract

The present invention provides a hierarchical codebook structure design method of a joint method used for the wireless communication technology. The codebook designed by the invention satisfies two design principles that all code words in a same layer needs to cover a whole space, the space coverage range of any code word in any layer of a codebook must be the set of the code words in a next layer; at the same time the lobe width of a kth layer is 2/2k, and the codebook of a last layer uses an expression form of a channel pointing vector. In the time of generating the code words of each layer, firstly the first code word of each layer is generated, then the code word is rotated to point to different directions, and all code words of the layer can be constructed. The hierarchical codebook designed by the invention is employed to carry out searching, the convergence rate of a search method is fast, the search success rate is high, the gain of beamforming is high, the receiving power is large at any stage, the utilization rate of emitting power is high, and the robustness is good in a condition of multiple paths.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and specifically refers to a hierarchical codebook structure design method applied to a combination method of a subarray type and a switch antenna type. Background technique [0002] Millimeter communication technology is a next-generation wireless communication technology with extraordinary prospects. Because the millimeter wave band has extremely rich spectrum resources, the millimeter wave communication technology can provide much higher channel capacity than the current communication technology. So in recent years, the research on millimeter wave wireless local area network and millimeter wave mobile communication network is in full swing. However, the huge technical problem faced by the millimeter wave communication technology is that the transmission attenuation of the millimeter wave signal is very large. In order to overcome the transmission attenuation, it is generally n...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/04H04B7/06
CPCH04B7/0456H04B7/0617Y02D30/70
Inventor 肖振宇贺同白琳
Owner BEIHANG UNIV
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