Single-carrier frequency domain equalization realization method and system

Abstract

The invention discloses a single-carrier frequency domain equalization realization method and a single-carrier frequency domain equalization realization system. Date frames employed in each step respectively comprise a training sequence part and a data transmission part; the data transmission part is behind the training sequence part and composed of an UW (Ultrasonic Wave) and a data block, and the UW is prior to the data block; the data block comprises multiple continuous FFT (Fast Fourier Transform Algorithm) blocks, any one of FFT blocks is respectively composed of one data and one UW, and the data is prior to the UW; the training sequence part is prior to the data transmission part and composed of the UW and a long PN (Performance number) sequence for frame synchronization detection and channel estimation, the long PN sequence is composed of the integral multiple of the UW, and the length of the long PN sequence is the same as the length of one data in the data block. According to the method and the system, the number of operation is reduced when the high precision is ensured.

Description

technical field [0001] The invention belongs to broadband wireless transmission technology, and in particular relates to a single carrier frequency domain equalization method and system. Background technique [0002] The International Telecommunication Union ITU has formulated the 4G system standard, which combines the mobile communication system with other systems (such as wireless local area network, WLAN) to generate 4G technology, provide more effective multiple services, and realize commercial wireless networks, local area networks, Bluetooth, broadcasting, The seamless connection and mutual compatibility of TV and satellite communications will enable the data transmission rate to reach 100Mb / s before 2010. The higher and higher transmission bandwidth causes serious time dispersion. The received signal contains multipath waves with attenuation and delay, which causes frequency selective fading, which leads to serious intersymbol interference (ISI) and reduces transmissi...

AI Technical Summary

Problems solved by technology

The higher and higher transmission bandwidth causes serious time dispersion. The received signal contains multipath waves with attenuation and delay, which causes frequency selective fading, which leads to serious intersymbol interference (ISI) and reduces transmission performance, especially In the high-speed broadband transmission, the delay spread spans more symbols, and the impact will be greater. Therefore, time dispersion is a main reason for the limited transmission rate of wireless channels.

If time-domain equalization is used alone to reduce ISI, more filter taps are required to obtain an acceptable equalization effect, and as the multipath delay spread increases, the equalization complexity increases exponentially. In such high-speed transmission, time-domain equalization is the most important not realistic

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