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
View PDF7 Cites 27 Cited by
  • 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 rela...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 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

Examples

Experimental program
Comparison scheme
Effect test

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 ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H04B1/04H04B1/10H04L25/06H04L25/03
Inventor 陈鹏
Owner HUAWEI TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap