Calibration method and device for broadband transceiver

Abstract

The invention discloses a correcting method of a broadband transceiver, and the correcting method comprises the following steps of selecting a plurality of frequency points as calibration frequency points; calculating a corresponding calibration correcting factor when the frequency of a carrier signal is respectively each calibration frequency point; respectively calculating correcting factors corresponding to the carrier signals transmitted or received by the broadband transceiver; and respectively correcting each carrier signal. In addition, the invention also discloses a correcting device of the broadband transceiver. The method of selecting the calibration frequency points and calculating the corresponding calibration correcting factors is adopted, so that the correcting factor can be respectively calculated for a carrier of each frequency point, and each carrier signal is further corrected. Thus when a mirror frequency point in a frequency spectrum is eliminated and the leakage problem on the sideband in broadband communication is overcome, a feedback link is not required by the hardware, so that the hardware resource is saved. Moreover, the signal can be well corrected under a multi-carrier communication condition, and the signal quality can be enhanced.

Description

technical field [0001] The invention relates to the technical field of broadband transceivers, in particular to a calibration method for broadband transceivers and a calibration device for broadband transceivers. Background technique [0002] In a broadband communication system, due to the influence of the size, power consumption, weight and cost of the transceiver, it is necessary to use a zero intermediate frequency (Zero Intermediate Frequency, ZIF for short) technology. Due to the local oscillator leakage of the analog device itself and the mismatch between the in-phase component I and the quadrature component Q, the performance of zero-IF receiving and transmitting signals is affected. To put it simply, the process of using zero-IF technology will be accompanied by DC leakage and the amplitude, phase, and group delay imbalance of I and Q signals, which will generate mirror frequency points symmetrical with zero frequency. A typical example is figure 1 As shown, where ...

AI Technical Summary

Problems solved by technology

Increased consumption of hardware resources

Moreover, due to the nonlinearity of analog devices, the amplitude and phase distortion and group delay at different frequency points are different. The current correction method cannot take into account the correction of signals in the case of multiple carriers. Affected signal quality

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