METHOD FOR COMPENSATION OF PHASE NOISE EFFECT ON DATA TRANSMISSION IN RADIO CHANNEL

• US 20190245569A1
• Filed: 02/11/2019
• Published: 08/08/2019
• Est. Priority Date: 08/10/2016
• Status: Active Grant

• Current Assignee: Limited Liability Company radio Gigabit
• Original Assignee: Limited Liability Company radio Gigabit
• Inventors: SHEVCHENKO, Andrey Arkadievich, KLYUEV, Alexey Fedorovich, PANTELEEV, Mikhail Vyacheslavovich, MASLENNIKOV, Roman Olegovich, ARTEMENKO, Alexey Andreevich
• Granted Patent: US 10,461,790 B2
• Time in Patent Office: Days
• CPC Class Codes: H04B 1/1027 assessing signal quality or detecting noise/interference for the received signal
• CPC Class Codes: H04B 1/123 using adaptive balancing or compensation means adaptive filter circuits and algorithms H03H
• CPC Class Codes: H04B 17/336 Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
• CPC Class Codes: H04B 17/345 Interference values signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR] H04B17/336
• CPC Class Codes: H04B 17/3912 Simulation models, e.g. distribution of spectral power density or received signal strength indicator [RSSI] for a given geographic region
• CPC Class Codes: H04L 2027/0067 Phase error detectors
• CPC Class Codes: H04L 27/0014 Carrier regulation of chaotic carriers H04L27/001; for multicarrier receivers H04L27/2657
• CPC Class Codes: H04L 27/2657 Carrier synchronisation
• CPC Class Codes: H04L 27/2672 Frequency domain
• CPC Class Codes: H04L 27/2675 Pilot or known symbols
• CPC Class Codes: H04L 27/2689 Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation
• CPC Class Codes: H04L 27/2695 with channel estimation, e.g. determination of delay spread, derivative or peak tracking channel estimation H04L25/0202

Abstract

The present invention generally relates to the field of electrical communication and more specifically to apparatuses and methods of phase noise mitigation for signal transmission in wideband telecommunication systems.

The method for compensation of the phase noise effect on the data transmission through a radio channel is based on a possibility to present the phase noise of a reference oscillator like a random process where the main spectral density is concentrated in the low-frequency region. Therefore, the number of estimated parameters can be reduced many times to several low-frequency spectral components instead of a direct estimation in the time domain.

The advantage of the method is an improvement of the estimation accuracy and a reduction of the computational complexity.

Claims

1. A method for estimation and compensation of the phase noise effect on the data transmission comprising:

a. Reception of a sequence of multiple signal samples;

b. Estimation of phase noise in the sequence of multiple signal samples;

c. Compensation of the phase noise in the sequence of multiple signal samples using a phase noise estimate,

wherein the procedure of phase noise estimation comprises the following successive steps;

b1. Selection of a sequence of several signal samples from a variety of signal samples;

b2. Direct estimation of the phase noise realization from the sequence of several signal samples;

b3. Generation of a sequence of estimates of the phase noise realization;

b4. Estimation and extraction of one or several phase noise low-frequency spectral components by a linear combination of the phase noise realization estimates with weighted coefficients;

b5. Estimation of the phase noise in a sequence of multiple signal samples in the time domain using the inverse Fourier transform of the estimated low-frequency phase noise components.

2. The method according to claim 1, wherein the number of estimated spectral components is selected a priori to cover the phase noise spectrum of the used signal generators at a preliminarily specified level.

3. The method according to claim 1, wherein pilot signals a priori known to the receiver are used for direct estimation of the phase noise realization.

4. The method according to claim 1, wherein received and demodulated data symbols are used for direct estimation of the phase noise realization.

5. The method according to claim 1, wherein a combination of the pilot signals a priori known to the receiver and the received and demodulated data symbols are used for direct estimation of the phase noise realization.

6. The method according to claim 1, wherein the Fast Fourier Transform (FFT) is used for estimation of the phase noise spectral components.

7. The method according to claim 1, wherein a method operating according to the minimum mean square error (MMSE) criterion is used for estimation of the phase noise spectral components.

8. The method according to claim 1, wherein the phase noise is preliminarily estimated and compensated via a linear interpolation of the phase noise values between samples or groups of samples of the pilot signals a priori known to the receiver.

9. The method according to claim 1, wherein the mean value of the phase noise calculated via averaging of phase noise values over samples of the pilot signal a priori known to the receiver is preliminarily estimated and compensated.

10. The method according to claim 1, wherein the phase noise estimation and compensation are performed before the received signal equalization.

11. The method according to claim 1, wherein the phase noise estimation and compensation are performed after the received signal equalization.

12. The method according to claim 1, wherein a block modulation with a single carrier and the frequency domain equalization is used for the signal transmission.

13. The method according to claim 12, wherein a length of the set of signal samples used for the phase noise estimation and compensation is a multiple of the signal modulation block length.

14. The method according to claim 1, which is applied in signal processing blocks of a digital modem for a wideband radio relay communication station.