Carrier leakage corrective system for radio frequency transceiver

A radio frequency transceiver and carrier leakage technology, applied in the field of communication, can solve problems such as reducing system cost, narrowing the range of two-way selection, increasing the complexity of the transceiver chip and digital baseband chip interface, etc., to reduce power consumption and chip area, reduce Two-way selection range, the effect of increasing interface complexity

Inactive Publication Date: 2009-10-07
BEIJING RFMC TECH CORP
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Problems solved by technology

[0007] The present invention aims to provide a carrier leakage correction system and method for radio frequency transceivers, which can solve the problem that the correction method of the transceiver carrier leakage in the prior art depends on the assistance of the digital baseband chip, and increases the cost of the transceiver chip and the digital baseband chip. The complexity of the interface reduces the range of two-way options, which is not conducive to reducing the cost of the system

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  • Carrier leakage corrective system for radio frequency transceiver
  • Carrier leakage corrective system for radio frequency transceiver
  • Carrier leakage corrective system for radio frequency transceiver

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Embodiment Construction

[0034] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0035] image 3 A block diagram of a carrier leakage correction system for a radio frequency transceiver according to an embodiment of the present invention is shown, including:

[0036] Signal detection module 10, it is multiplexed with radio frequency transceiver, is used for detecting the strength of analog signal;

[0037] An analog-to-digital converter 20, configured to convert the above-mentioned analog signal into a digital signal;

[0038] The compensation circuit 30 is configured to compensate the transmitter analog baseband processing circuit of the transceiver according to the digital signal.

[0039] In this embodiment, the signal detection module 10 multiplexed with the radio frequency transceiver is used to detect the strength of the carrier leakage signal, and the analog-to-digital converter 20 is used to convert the...

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Abstract

The present invention provides a carrier corrective system for radio frequency transceiver that includes signal detection module for detecting analog signals; analogue-to-digital converter for converting analog signals into digital signals; compensating circuit for compensating the transmitter analog baseband processing circuit of the transceiver according to the digital signals. The invention conquers problem that the corrective method of transceiver carrier leakage in prior art depends on the assistance of digital baseband chip, and increases complexity of the transceiver and the digital baseband chip interface, and shorts bidirectional selection range without reducing system cost.

Description

technical field [0001] The invention relates to the communication field, in particular to a carrier leakage correction system for a radio frequency transceiver. Background technique [0002] Transceivers with a zero-IF or low-IF structure do not require an off-chip image rejection filter, have small power consumption and area, and are highly integrated, so they are widely used. In these two structures, factors such as capacitance, substrate coupling, or baseband DC offset will cause the carrier (ie local oscillator) signal to enter the output spectrum of the RF transmitter. This effect is called carrier leakage (Carrier Leak, CL for short). Carrier leakage will deteriorate the linearity of subsequent circuits (power amplifiers, etc.), resulting in a shift in the origin of the transmitted signal constellation diagram. After the carrier is transmitted, it will also cause interference to other RF front-ends. In a CDMA (Code Division Multiple Access, Code Division Multiple Acc...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/00H04B1/40H04B1/525
Inventor 刘瑞峰李卓王玉花陈永聪王文申
Owner BEIJING RFMC TECH CORP
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