Direct-current component overcoming method and system based on time frequency interweaving single carrier frequency domain equalization

Abstract

The application provides a direct-current component overcoming method and system based on time frequency interweaving single carrier frequency domain equalization. The method comprises the following steps: at a sending terminal, carrying out data rearrangement and phase rotation according to an initial data block so as to obtain K data blocks, wherein the initial data block is the first data block and K is a natural number; then sequentially transmitting the K data blocks from the first data block, wherein the transmission process of each data block is as follows: adding a guard space to the tail end of the data block and transmitting; at a receiving terminal, moving the guard spaces out of the tail ends of the received K data blocks and correspondingly adding the data in the guard spaces with the data at the front end of the data blocks; and carrying out linear combination on the K data blocks added with the guard spaces.

Description

technical field [0001] The present application relates to the technical field of wireless communication, in particular to a method and system for overcoming DC components based on time-frequency interleaving and single-carrier frequency-domain equalization. Background technique [0002] At present, the general wireless communication receiver system adopts the IF double-conversion method, which has good image elimination performance, and the IF double-conversion method uses an IF surface acoustic wave filter (IF SAW) to reduce image interference. However, one of the superheterodyne tuners requires complex two-stage mixing: the signal is first dropped from the RF band to the IF, and then the signal is dropped to baseband through a second-stage mixing circuit. [0003] The receiver of the zero-IF method can directly reduce the RF signal from the RF band to the baseband with only one mixing. The direct conversion receiver does not have the problem of image interference, and it c...

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Problems solved by technology

[0004] However, the ultra-wideband zero-IF receiver also has its disadvantages: because the 1 / f noise of the zero-IF down-conversion method will overlap with the complex baseband signal spectrum, the closer to the signal baseband zero frequency (DC) point, the stronger the noise, so 1 / f mixer noise will cause the signal-to-noise ratio of the receiver's baseband signal to drop significantly

The problem of peak-to-average power ratio increases the transmission energy consumption by more than ten times, and also puts forward high requirements on the automatic level control and the linearity of the high-frequency part of the circuit

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