| | | | | | | |
                
Indian Science Technology and Engineering facilities Map
Supplier Map
Service Map










Patents

Patent Details

Applicant:
Indian Institute of Technology (IIT) Roorkee 
Title:
Time interleaved digital transmitter using multi-level digital quantization 
Inventor(s):
Karun Rawat and Nishant Kumar 
Applicant:
Indian Institute of Technology (IIT) Roorkee 
Application type:
Applied - 2018-06-12 
Application Number:
201811021993 
Applied at:
India 
Entered by:
Indian Institute of Technology (IIT) Roorkee 
Abstract:
It includes digital encoder, level transformer and GHz converter, high efficiency power amplifiers (HEPAs), power combiner and band pass filter. Digital encoder block converts amplitude and phase information of input baseband signal into N-level quantized signal. Due to its N-level structure the quantization noise is reduced significantly. These N-level quantized signals are further transformed to M number of bi-level, time interleaved signals such that M<N/2. Each of these bi-level signals is modulated over RF carrier frequency and being amplified by individual HEPA. The output of each HEPA is then combined using power combiner to retrieve the N-level quantized signal modulated over the RF carrier. This signal is then passed through bandpass filter to remove the unwanted noise and reconstruct the envelope of original baseband data modulated over RF carrier frequency before the transmission. This new architecture minimizes the quantization noise while operating each power amplifier at saturation resulting into highly power and spectral efficient transmission. Moreover, this architecture reduces the number of bi-level signals and hence the number of processing hardware such as quadrature modulator, multiplexers and power amplifiers used to process theses bi-level signals are minimized. This eventually results into small form-factor of the transmitter.  

 
THE VISION
THE MISSION
ABOUT I-STEM
It has always been the basic tenet of the Government of India, in generously funding R&D efforts at academic institutions over the years, that facilities established through such support be made available to those needing them and qualified to make use of them for their own research work
read more >>

However, this was never easy or straightforward for, among other reasons, there was no ready source of information of what facility was available and where. Thanks to the Web, it is much easier today to have a national and regional “inventory of resources”, so as to match users with the resources they need, and to do all this in an efficient and transparent manner.

This can lead to a leap in R&D productivity and greatly enhance the effectiveness of public investment. This is the motivation behind I-STEM.
read less <<
Visitor Hit Counter
Toll Free Number : 1800 425 3281
Hosted at Indian Institute of Science
Copyright © 2019 I-STEM. All rights reserved    Audited by: STQC Bengaluru.