Optical Transmission System, Optical Transmission Method, Transmitter, and Receiver
US-2024380491-A1 · Nov 14, 2024 · US
Quadrature digital-IF transmitter without inter-stage SAW filter and devices using same
US8995569B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8995569-B2 |
| Application number | US-201113341495-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 30, 2011 |
| Priority date | Dec 30, 2011 |
| Publication date | Mar 31, 2015 |
| Grant date | Mar 31, 2015 |
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- Title
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Abstract
Official abstract text for this publication.
An RF transmitter comprises a digital-to-IF circuit block configured to receive a digital in-phase baseband signal and a digital quadrature baseband signal and to up-convert the digital in-phase and quadrature baseband signals to a digital in-phase IF signal and to a digital quadrature IF signal. The wireless RF transmitter further comprises an IF-to-RF circuit block configured to convert the digital in-phase and quadrature IF signals to analog signals and to up-convert the analog in-phase and quadrature IF signals to an RF output signal. The digital-to-IF circuit block comprises pre-compensation circuitry configured to reduce analog impairments associated with the IF-to-RF circuit block.
First claim
Opening claim text (preview).
What is claimed is: 1. A wireless radio-frequency (RF) transmitter comprising: a digital-to-intermediate frequency (IF) circuit block configured to receive a digital in-phase baseband signal and a digital quadrature baseband signal and to up-convert the digital in-phase and quadrature baseband signals to a digital in-phase IF signal and a digital quadrature IF signal; a digital-to-analog (DAC) converter block configured to convert the digital in-phase IF signal and the digital q…
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Classifications
- H04L25/03343Primary
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
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Frequently asked questions
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- What does patent US8995569B2 cover?
- An RF transmitter comprises a digital-to-IF circuit block configured to receive a digital in-phase baseband signal and a digital quadrature baseband signal and to up-convert the digital in-phase and quadrature baseband signals to a digital in-phase IF signal and to a digital quadrature IF signal. The wireless RF transmitter further comprises an IF-to-RF circuit block configured to convert the d…
- Who is the assignee on this patent?
- Loh Lup Meng, Elahi Imtinan, Yanduru Naveen, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification H04L25/03343. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Mar 31 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).