Millimeter wave system fast channel estimation method

Abstract

The present invention provides a millimeter wave system fast channel estimation method, belonging to the technical field of wireless communication systems. The method comprises a step of carrying out interval division on the space range covered by communication beams according to a communication beam number Q, and using a binary system to express an interval code, a step of designing a training beam such that the main lobe of the training beam is only at the kth area with 1 bit of the interval code, a step of using the training beam to emit a signal by a transmitter, recording the signal intensity of each training beam by a receiver, judging whether the beam is in the main lobe of the training beam, and obtaining an optimal communication beam. According to the method, a stepping search mode is adopted when Q is larger than 16, the searching range is subjected to interval division in each period, and the optimal interval is searched. According to the method, a beam with the superimposition of multiple main lobes are utilized to carry out beam searching, the searching efficiency is high, the search complexity is low, and the method is suitable for the beamforming of 2D and 3D and has an obvious advantage in the multi-user simultaneous searching of a star topology structure.

Description

technical field [0001] The invention belongs to the technical field of wireless communication systems, and in particular relates to a fast channel estimation method for a millimeter wave system. Background technique [0002] At present, the rapid growth of high-speed services has made the goal of the next-generation communication technology to provide transmission rates above Gbps. Obviously, the communication system in the medium and low frequency bands is difficult to meet the demand. Moreover, there are many services in this frequency band and the spectrum is crowded, so the industry will focus on millimeters. band. This frequency band is characterized by a shorter wavelength, which enables the device to integrate more antennas, which not only greatly improves spectrum utilization, but also obtains array gain, which just makes up for the shortcoming of insufficient coverage distance in the millimeter-wave band due to large attenuation. However, when the number of antenna...

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Problems solved by technology

[0009] The total amount of feedback information of the three methods is the same, but the complexity of each method is different, the reason is that there are differences in the efficiency of information representation

Therefore, the expression efficiency of the dichotomy method is low. Although the trisection method uses the superposition state of the beam side lobes, it does not use the superposition of the main lobe, indicating that there is still room for improvement in efficiency.

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