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Zero intermediate frequency transmitter, receiver and related method and system

A zero-IF transmitter and frequency mixing technology, applied in the field of communications, can solve problems such as local oscillator leakage

Active Publication Date: 2014-11-19
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Embodiments of the present invention provide a zero-IF transmitter, receiver, and related methods and systems to solve the local oscillator leakage problem of the existing zero-IF system

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  • Zero intermediate frequency transmitter, receiver and related method and system
  • Zero intermediate frequency transmitter, receiver and related method and system
  • Zero intermediate frequency transmitter, receiver and related method and system

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Embodiment Construction

[0050] Embodiments of the present invention provide a zero-IF transmitter, receiver, and related methods and systems, so as to solve the local oscillator leakage problem of the existing zero-IF microwave system.

[0051] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0052] In the following, specific examples will be used to describe in detail respectively.

[0053] Please refer to ...

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Abstract

The invention discloses a zero intermediate frequency transmitter, a receiver and a related method and a system and aims to solve the problem of local oscillation leakage in the conventional zero intermediate frequency system. According to feasible implementation approaches provided by the invention, the zero intermediate frequency transmitter can comprise a baseband processing circuit, a mixing circuit, a power amplification circuit and a signal detection circuit, wherein the baseband processing circuit is used for generating two-path I / Q baseband signals; the mixing circuit is used for mixing and superimposing the two-path I / Q baseband signals and two-path local oscillation signals to generate mixing signals; the power amplification circuit comprises N cascade power adjustment units and is used for adjusting the power of the mixing signals; the signal detection circuit is used for sampling and detecting the output signals of the number m grade power adjustment unit to obtain feedback signals; the baseband processing circuit is further used for evaluating and revising a matrix in accordance with the feedback signals and revising the two-path I / Q baseband signals to restrain the mixing circuit leakage and the local oscillation leakage from the output end of the mixing circuit to the number m grade power adjustment unit of the power amplification circuit.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a zero-IF transmitter, receiver and related methods and systems. Background technique [0002] Microwave transceiver systems used in fields such as wireless communication base stations generally include two architectures: intermediate frequency (intermediate frequency, IF) and zero intermediate frequency (zero intermediate frequency, ZIF). [0003] The transmission link of a microwave system with an IF architecture is as follows: figure 1 As shown (the filter is not shown), generally divided into indoor unit (indoor unit) and outdoor unit (outdoor unit), the indoor unit includes a modem (Modem), a digital-to-analog converter (Digital to analog converter, DAC) and a first Mixer (Mixer1); the outdoor unit includes a second mixer (Mixer2), a third mixer (Mixer3), a power amplifier (power amplifier, PA, power amplifier for short), and the like. Its working process is...

Claims

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Application Information

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IPC IPC(8): H04B1/04H04B1/10H04L25/06H04L25/03
Inventor 陈鹏
Owner HUAWEI TECH CO LTD
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