ADAPTIVE WAVELET DOMAIN COMPENSATION OF OFDM IQ IMBALANCE USING COMBINED DATA SELECTIVE AND SELECTIVE COEFFICIENT UPDATING

Q: How can I download an article?

To download an article from SID, first log in to the site, search for the article title, and click on the 'Download Article' option.

Q: How can I download an ISI article?

To download an ISI article on SID, enter the keyword or article title in the search bar, view the relevant results, click on the desired article, and select the 'Download Article' option.

Q: How can I access the SID database?

To access the SID database, visit SID.ir, create an account, and log in to access scientific resources.

Q: Is downloading articles from SID free?

Some articles on SID are available for free, while others require payment. Details are specified on the article's page.

RASI JAFAR; MOZAFFARI TAZEHKAND BEHZAD

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Journal Paper

Paper Information

Journal: JOURNAL OF NONLINEAR SYSTEMS IN ELECTRICAL ENGINEERING Year:2018 | Volume:4 | Issue:1-2 Page(s): 26-46

Download Full-Text

Persian Verion

View:

477

Download:

Cites:

Information Journal Paper

Title

ADAPTIVE WAVELET DOMAIN COMPENSATION OF OFDM IQ IMBALANCE USING COMBINED DATA SELECTIVE AND SELECTIVE COEFFICIENT UPDATING

Author(s)

RASI JAFAR | MOZAFFARI TAZEHKAND BEHZAD | Issue Writer Certificate

Keywords

WAVELET PACKET TRANSFORM (WPT)

SELECTIVE COEFFICIENT UPDATING

DATA SELECTIVE UPDATING

IN-PHASE/QUADRATURE (IQ) IMBALANCE

PER-TONE EQUALIZATION (PTEQ)

SET-MEMBERSHIP FILTERING

Abstract

In this paper, joint effect of transmitter and receiver IQ imbalance under insufficient and sufficient cyclic prefix (CP) is studied. The case of insufficient CP length results in interblock-interference (IBI) between the OFDM symbols. For compensation of this effect and other impairments, simultaneously, per-tone equalization (PTEQ) structure implementation is necessary. Regarding to the topology of this structure and required high length filters, the system computations will be very high, even using simplest adaptive algorithms. In this paper, firstly wavelet packet transform (WPT) is applied to branches of PTEQ structure to increase the convergence speed of adaptive algorithms. Then it is proposed to use the selective coefficient update (SCU) based on packets entropy on each branch of this structure to decrease the computations. In this way, not only the large amount of calculations will be eliminated but also systems operation will not be affected. Also, to further increase of convergence speed and computation reduction, using the data selective update (DSU) along with SCU is proposed. This kind of filtering (DSU) increases the algorithms convergence speed because of using adaptive noise dependent step size. Simultaneous using of two DSU and SCU methods besides the expedition and denoising characteristics of WPT makes suitable the proposed algorithm for using in real time systems. Simulation results show that this algorithm not only causes considerably reduction on the amount of calculations, but also does not affect the normal operation of algorithm. In addition, it is capable to compensate the joint channel and IQ imbalance distortions.

Cites

No record.

References

No record.

Cite

APA: Copy

RASI, JAFAR, & MOZAFFARI TAZEHKAND, BEHZAD. (2018). ADAPTIVE WAVELET DOMAIN COMPENSATION OF OFDM IQ IMBALANCE USING COMBINED DATA SELECTIVE AND SELECTIVE COEFFICIENT UPDATING. JOURNAL OF NONLINEAR SYSTEMS IN ELECTRICAL ENGINEERING, 4(1-2 ), 26-46. SID. https://sid.ir/paper/265603/en

Vancouver: Copy

RASI JAFAR, MOZAFFARI TAZEHKAND BEHZAD. ADAPTIVE WAVELET DOMAIN COMPENSATION OF OFDM IQ IMBALANCE USING COMBINED DATA SELECTIVE AND SELECTIVE COEFFICIENT UPDATING. JOURNAL OF NONLINEAR SYSTEMS IN ELECTRICAL ENGINEERING[Internet]. 2018;4(1-2 ):26-46. Available from: https://sid.ir/paper/265603/en

IEEE: Copy

JAFAR RASI, and BEHZAD MOZAFFARI TAZEHKAND, “ADAPTIVE WAVELET DOMAIN COMPENSATION OF OFDM IQ IMBALANCE USING COMBINED DATA SELECTIVE AND SELECTIVE COEFFICIENT UPDATING,” JOURNAL OF NONLINEAR SYSTEMS IN ELECTRICAL ENGINEERING, vol. 4, no. 1-2 , pp. 26–46, 2018, [Online]. Available: https://sid.ir/paper/265603/en

Related Journal Papers