View source for 18516515. AFFINE FREQUENCY DIVISION MULTIPLEXING WAVEFORMS FOR DOUBLY DISPERSIVE CHANNELS simplified abstract (Huawei Technologies Co., Ltd.)

=AFFINE FREQUENCY DIVISION MULTIPLEXING WAVEFORMS FOR DOUBLY DISPERSIVE CHANNELS=


==Organization Name==

[[:Category:Huawei Technologies Co., Ltd.|Huawei Technologies Co., Ltd.]]


[[Category:Huawei Technologies Co., Ltd.]]

==Inventor(s)==

[[:Category:Nassar Ksairi of Boulogne Billancourt (FR)|Nassar Ksairi of Boulogne Billancourt (FR)]][[Category:Nassar Ksairi of Boulogne Billancourt (FR)]]

[[:Category:Merouane Debbah of Boulogne Billancourt (FR)|Merouane Debbah of Boulogne Billancourt (FR)]][[Category:Merouane Debbah of Boulogne Billancourt (FR)]]

==AFFINE FREQUENCY DIVISION MULTIPLEXING WAVEFORMS FOR DOUBLY DISPERSIVE CHANNELS - A simplified explanation of the abstract==


This abstract first appeared for US patent application 18516515 titled 'AFFINE FREQUENCY DIVISION MULTIPLEXING WAVEFORMS FOR DOUBLY DISPERSIVE CHANNELS

==Simplified Explanation==

A signal is generated by modulating multiple chirp signals with input symbols, where the chirp signals are characterized by a second-order bivariate polynomial with coefficients adjusted for frequency diversity and Doppler spread mitigation in a discrete affine Fourier transform domain virtual channel.

* Chirp signals are modulated with input symbols to generate the signal.
* Chirp signals are described by a second-order bivariate polynomial.
* Coefficients of the quadratic terms of the polynomial are chosen for desired frequency diversity.
* At least one coefficient is modified based on channel state information to reduce effective Doppler spread in a discrete affine Fourier transform domain virtual channel.

== Potential Applications ==
This technology could be applied in:
* Wireless communication systems
* Radar systems
* Sonar systems

== Problems Solved ==
This technology addresses:
* Frequency diversity in signal generation
* Mitigation of effective Doppler spread
* Optimization of chirp signal coefficients for improved performance

== Benefits ==
The benefits of this technology include:
* Enhanced signal quality
* Improved communication reliability
* Better performance in challenging channel conditions

== Potential Commercial Applications ==
Potential commercial applications include:
* Telecommunications industry
* Defense and security sector
* Automotive radar systems

== Possible Prior Art ==
One possible prior art could be the use of chirp signals in radar systems for target detection and tracking. Another could be the optimization of signal coefficients in wireless communication systems for improved performance.

=== Unanswered Questions ===

=== How does this technology compare to existing methods for frequency diversity in signal generation? ===
This article does not provide a direct comparison to existing methods for frequency diversity in signal generation. It would be helpful to understand the specific advantages or differences this technology offers compared to traditional approaches.

=== What impact does adjusting coefficients based on channel state information have on overall system performance? ===
The article mentions adjusting coefficients based on channel state information, but it does not delve into the specific impact this adjustment has on system performance. Understanding the extent to which this adjustment improves signal quality or mitigates Doppler spread would be valuable information.


==Original Abstract Submitted==

A signal may be generated by modulating a plurality of chirp signals with a set of input symbols. Chirp signals may be characterized by a second order bivariate polynomial and the coefficients of the quadratic terms of the polynomial may be selected to achieve desired frequency diversity. Furthermore, at least one of the coefficients may be adjusted based on channel state information to mitigate effective Doppler spread in a discrete affine Fourier transform domain virtual channel.



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