Receiving machine frequency response recognition method, apparatus and compensating method

Abstract

The invention provides a recognition method for the frequency response of a receiver, and a device and a compensating method thereof. The recognition method comprises the following steps: firstly, a receiver receives calibration frames cyclically sent by a signal generator, and each calibration frame comprises a re-sinusoidal time slot, a PN time slot, a detection OFDM time slot and a plurality of protection time slots; secondly, nolinear damage estimation and coarse synchronizing estimation are performed according to the re-sinusoidal time slot in the calibration frame, and the nolinear damage is compensated; thirdly, precise synchronizing estimation is performed according to the coarse synchronizing estimation result and the PN time slot in the calibration frame; fourthly, after precise synchronizing, the recognition of linear response is carried out according to the detection OFDM time slot in the calibration frame after nolinear damage estimation. According to the invention, the channel frequency response of the receiver can be effectively recognized, and the frequency response can be compensated, so as to increase the maximum signal to noise ratio of the signal in the pass band of the receiver, so that the receiver performance can be enhanced equivalently.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to an identification method, device and compensation method of a receiver frequency response. Background technique [0002] On the one hand, for a wireless receiver, the performance of the receiver directly determines the best performance of the wireless link, and there are obvious differences in the performance of different radio frequency (RF) chips. In the usual calibration, only the automatic gain control (AGC), automatic power control (APC) and automatic frequency control (AFC) are calibrated, even in the array antenna calibration, only the relative amplitude and phase without individually identifying and calibrating the frequency response characteristics of each receive channel. [0003] On the other hand, even if the error vector magnitude (EVM) performance of the receiver is basically the same, the digital baseband cannot distinguish the relative proportio...

AI Technical Summary

Problems solved by technology

In the usual calibration, only the automatic gain control (AGC), automatic power control (APC) and automatic frequency control (AFC) are calibrated, even in the array antenna calibration, only the relative amplitude and phase without individually identifying and calibrating the frequency response characteristics of each receive channel

[0003] On the other hand, even if the error vector magnitude (EVM) performance of the receiver is basically the same, the digital baseband cannot distinguish the relative weight of the nonlinear impairment and the linear response

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