BER (Bit Error Rate) analysis method based on distributed 60GHz indoor communication system

Abstract

The invention provides a BER (Bit Error Rate) analysis method based on a distributed 60GHz indoor communication system. The method comprises the following steps: step S1, building a distributed 60GHz system model by using several remote transmitting antennas; constructing a composite channel fading model according to the built distributed 60GHz system model, wherein a small-scale fading channel in the model obeys the Nakagami-m distribution, and a large-scale fading channel consists of two parts: path loss and shadow fading; step S2, according to the composite channel fading model and in combination with the effective signal to noise ratio corresponding to each transmitting antenna, obtaining a cumulative distribution function corresponding to each transmitting antenna; step S3, adopting an antenna selection algorithm, selecting a transmitting antenna with the largest signal to noise ratio to transmit signals, and obtaining a cumulative distribution function of the effective signal to noise ratio corresponding to the transmitting antenna in combination with the cumulative distribution function of the transmitting antenna; and step S4, according to the cumulative distribution function of the effective signal to noise ratio corresponding to the transmitting antenna with the largest signal to noise ratio, calculating an average BER of the distributed 60GHz system by using a BER formula of an accurate M-QAM modulation mode under an additive white Gaussian noise channel.

Description

technical field [0001] The invention relates to the technical field of digital communication, in particular to a BER analysis method based on a distributed 60GHz indoor communication system. Background technique [0002] With the increasing demand for short-distance high-speed wireless communication, millimeter wave communication (60GHz) has become a research hotspot. Compared with other short-distance wireless communications, d millimeter wave (mmW) in the 60GHz frequency band has an unlicensed operating bandwidth of 7GHz, and can provide high data transmission on the order of Gbps with only a simple signal modulation format. However, water and oxygen in the atmosphere seriously absorb 60GHz radio waves, and millimeter waves have a short transmission distance in free space, so they are only suitable for short-distance communications. Secondly, the 60GHz frequency is very high and the wavelength is short, so it is particularly sensitive to the positional movement between th...

AI Technical Summary

Problems solved by technology

The above studies provide analysis methods for channel modeling and antenna selection schemes, but lack of system performance analysis and corresponding evaluation methods

Patent 1 (distributed antenna system and distributed antenna signal processing method and device, CN201510834379.0, 2015) solves the technical problem of high cost of distributed antenna system and provides favorable conditions for the application of 60GHz frequency band, but does not Design and analysis of high frequency system transmission mechanism

Patent 2 (a MIMO system channel estimation method and device in a 60GHz indoor scene, CN201610076606, 2016) proposes a channel estimation selection algorithm, which simplifies the complexity of the original channel estimation method, but lacks a design scheme for the transceiver end of the system

Patent 3 (Remote Distributed Antenna System, CN201480030493.1, 2014) provides a distributed antenna system that shifts the output frequency of one or more micro cells to 60 GHz for transmission to a distributed antenna set. This system is only applicable to micro cells In many cases, it cannot be satisfied

With the development of 60GHz communication system, the research content of the existing literature will not meet the actual needs

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