SER/BER Expression for M-QAM OFDM Systems with Imperfect Channel Estimation and I/Q Imbalance

Udesh Oruthota; Olav Tirkkonen

doi:10.1186/1687-1499-2012-303

SER/BER Expression for M-QAM OFDM Systems with Imperfect Channel Estimation and I/Q Imbalance

Udesh Oruthota, Olav Tirkkonen

Communications Theory

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Abstract

We investigate the joint effect of channel estimation and frequency flat transmitter and receiver I/Q imbalance on an Orthogonal Frequency Division Multiplex (OFDM) system. We assume independent fading with identically and independently distributed (i.i.d) mirror carrier channel coefficients. Closed form expressions for symbol error rate and bit error rate of M-QAM modulation are derived. We consider join and separate channel estimation, as well as joint and separate equalization of the mirror carriers. Performance is evaluated by treating the I/Q interference as a non-Gaussian random variable. The results show that a Gaussian approximation of I/Q interference is very good, especially for low order modulations.

Original language	English
Article number	303
Pages (from-to)	1-14
Journal	Eurasip Journal on Wireless Communications and Networking
Volume	2012
DOIs	https://doi.org/10.1186/1687-1499-2012-303
Publication status	Published - 2012
MoE publication type	A1 Journal article-refereed

Keywords

I/Q imbalance
OFDM
Rayleigh fading channel
Imperfect channel estimation
Symbol error rate
Bit error rate

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10.1186/1687-1499-2012-303

art_10.1186_1687-1499-2012-303Final published version, 1.36 MBLicence: CC BY

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title = "SER/BER Expression for M-QAM OFDM Systems with Imperfect Channel Estimation and I/Q Imbalance",

abstract = "We investigate the joint effect of channel estimation and frequency flat transmitter and receiver I/Q imbalance on an Orthogonal Frequency Division Multiplex (OFDM) system. We assume independent fading with identically and independently distributed (i.i.d) mirror carrier channel coefficients. Closed form expressions for symbol error rate and bit error rate of M-QAM modulation are derived. We consider join and separate channel estimation, as well as joint and separate equalization of the mirror carriers. Performance is evaluated by treating the I/Q interference as a non-Gaussian random variable. The results show that a Gaussian approximation of I/Q interference is very good, especially for low order modulations.",

keywords = "I/Q imbalance, OFDM, Rayleigh fading channel, Imperfect channel estimation, Symbol error rate, Bit error rate",

author = "Udesh Oruthota and Olav Tirkkonen",

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T1 - SER/BER Expression for M-QAM OFDM Systems with Imperfect Channel Estimation and I/Q Imbalance

AU - Oruthota, Udesh

AU - Tirkkonen, Olav

PY - 2012

Y1 - 2012

N2 - We investigate the joint effect of channel estimation and frequency flat transmitter and receiver I/Q imbalance on an Orthogonal Frequency Division Multiplex (OFDM) system. We assume independent fading with identically and independently distributed (i.i.d) mirror carrier channel coefficients. Closed form expressions for symbol error rate and bit error rate of M-QAM modulation are derived. We consider join and separate channel estimation, as well as joint and separate equalization of the mirror carriers. Performance is evaluated by treating the I/Q interference as a non-Gaussian random variable. The results show that a Gaussian approximation of I/Q interference is very good, especially for low order modulations.

AB - We investigate the joint effect of channel estimation and frequency flat transmitter and receiver I/Q imbalance on an Orthogonal Frequency Division Multiplex (OFDM) system. We assume independent fading with identically and independently distributed (i.i.d) mirror carrier channel coefficients. Closed form expressions for symbol error rate and bit error rate of M-QAM modulation are derived. We consider join and separate channel estimation, as well as joint and separate equalization of the mirror carriers. Performance is evaluated by treating the I/Q interference as a non-Gaussian random variable. The results show that a Gaussian approximation of I/Q interference is very good, especially for low order modulations.

KW - I/Q imbalance

KW - OFDM

KW - Rayleigh fading channel

KW - Imperfect channel estimation

KW - Symbol error rate

KW - Bit error rate

UR - http://dx.doi.org/10.1186/1687-1499-2012-303

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DO - 10.1186/1687-1499-2012-303

M3 - Article

SN - 1687-1472

VL - 2012

SP - 1

EP - 14

JO - Eurasip Journal on Wireless Communications and Networking

JF - Eurasip Journal on Wireless Communications and Networking

M1 - 303

ER -

SER/BER Expression for M-QAM OFDM Systems with Imperfect Channel Estimation and I/Q Imbalance

Abstract

Keywords

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