OFDM Link Performance Analysis under Various Receiver Impairments

Krondorf, M.; Fettweis, Gerhard

doi:10.1155/2008/145279

Cited by 20 publications

(17 citation statements)

References 5 publications

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“…We present closed form expressions for both the symbol error rate (SER) and the bit error rate (BER) with Gray coded bit mapping in independently Rayleigh fading channels under the joint effects of least squares channel estimation and frequency flat transmitter and receiver I/Q imbalance. Comparing to the Gaussian BER approximation results of [13], we observe that the Gaussian approximation works well, especially for small constellation sizes.…”

Section: Introductionmentioning

confidence: 67%

“…Krondorf and Fettwis [13,14] numerically evaluate the bit error rate performance of a coded and uncoded OFDM systems with all impairments including carrier frequency offset (CFO), I/Q imbalance, frequency selectivity and channel estimation errors on direct conversion ZF receiver with Least Square (LS) channel estimation. The inter-carrier interference (ICI) due to CFO and I/Q imbalance on effective transmitted symbol is assumed to be Gaussian distributed.…”

Section: Introductionmentioning

confidence: 99%

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SER/BER expression for M-QAM OFDM systems with imperfect channel estimation and I/Q imbalance

Oruthota

Tirkkonen

2012

J Wireless Com Network

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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.

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Section: Introductionmentioning

confidence: 67%

Section: Introductionmentioning

confidence: 99%

SER/BER expression for M-QAM OFDM systems with imperfect channel estimation and I/Q imbalance

Oruthota

Tirkkonen

2012

J Wireless Com Network

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“…To make radar processing easier, the time-domain CE-OFDM multi-carrier transmitted signal can be expressed as [7][8][9].…”

Section: Ce-ofdm Radar Processing In Frequency Domainmentioning

confidence: 99%

“…For multicarrier RadCom waveforms, an additional multiple-access technique is required for multiple-user communication operation [7], and dedicated frequency-domain processing techniques can be exploited to improve the performance of the radar application. In terms of broadband continuous waveform, orthogonal frequency division multiplexing (OFDM) is the key technology of Long-Term Evolution (LTE) and its performance can be promoted by encoding, e.g., the turbo code [8,9].…”

Section: Introductionmentioning

confidence: 99%

Constant envelope OFDM RadCom fusion system

Huang

et al. 2018

J Wireless Com Network

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A joint radar and wireless communication (RadCom) fusion system is an important trend for future intelligent transportation, such as the Internet of Vehicles (IOV). However, traditional joint orthogonal frequency division multiplexing (OFDM)-based RadCom fusion system suffers from the problem of high peak-to-average power ratio (PAPR) of transmission signals, leading to nonlinear distortion in high power amplifiers (HPAs). To solve this problem, a new constant envelope OFDM RadCom approach is proposed in this paper. Taking phase modulation into consideration, the constant envelope OFDM RadCom system obtains 0 dB PAPR value, which results in linear high power amplifier being feasible. In the receiver side, both communication transmission and target detection are guaranteed by a phase demodulator and frequency-domain signal processing algorithm, respectively. Simulation results demonstrate that the constant envelope OFDM RadCom system is a feasible solution for future IOV with the capability of target detection and wireless communication simultaneously.

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“…W l is the additive Gaussian noise component. Correct time and frequency synchronization is assumed in (1). Subcarrierwise equalization is done in a zero-forcing manner, using the channel estimatesĤ l .…”

Section: A Lte Link Level Modelmentioning

confidence: 99%