Energy production cost and PAR minimization in multi-source power networks

Ghebremariam, S.; Beygi, Sajjad; Bahrami, Hamid Reza; Sözer, Yilmaz; Mohsenian‐Rad, Hamed

doi:10.1109/isgt.2012.6175716

Cited by 3 publications

(2 citation statements)

References 28 publications

(31 reference statements)

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“…Phase noise is another major impairment caused by non-ideal oscillator which introduces random phase fluctuations at the oscillator output resulting in distortion of the signals [3]. The effect of phase noise is more severe in OFDM systems and is studied extensively in the literature [6], [7]. These works state that the effect of phase noise can be broken down into common phase error (CPE) and inter-carrier interference (ICI) with CPE being more prominent for systems with small phase noise.…”

Section: Introductionmentioning

confidence: 99%

Compensation of IQ-Imbalance and Phase Noise in MIMO-OFDM Systems

Bogana¹

2012

Preprint

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The degrading effect of RF impairments on the performance of wireless communication systems is more pronounced in MIMO-OFDM transmission. Two of the most common impairments that significantly limit the performance of MIMO-OFDM transceivers are IQ-imbalance and phase noise. Low-complexity estimation and compensation techniques that can jointly remove the effect of these impairments are highly desirable. In this paper, we propose a simple joint estimation and compensation technique to estimate channel, phase noise and IQ-imbalance parameters in MIMO-OFDM systems under multipath slow fading channels. A subcarrier multiplexed preamble structure to estimate the channel and impairment parameters with minimum overhead is introduced and used in the estimation of IQ-imbalance parameters as well as the initial estimation of effective channel matrix including common phase error (CPE). We then use a novel tracking method based on the second order statistics of the intercarrier interference (ICI) and noise to update the effective channel matrix throughout an OFDM frame. Simulation results for a variety of scenarios show that the proposed low-complexity estimation and compensation technique can efficiently improve the performance of MIMO-OFDM systems in terms of bit-error-rate (BER).

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Section: Introductionmentioning

confidence: 99%

Compensation of IQ-Imbalance and Phase Noise in MIMO-OFDM Systems

Bogana¹

2012

Preprint

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“…where P (c → c ′ ) represents the PEP and P (c) is the probability of transmission of codeword c. The PEP can be derived by using the Moment Generating Function (MGF) method [8]. The Q-function can be alternatively expressed in the Craigś formula as [7]:…”

Section: Pairwise Error Probabilitymentioning

confidence: 99%

Space-time trellis codes for correlated channels

Amat

Navarro²,

Tarable³

Proceedings of the 3rd IEEE International Symposium on Signal Processing and Information Technology (IEEE Cat. No.03EX795)

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We consider the analysis and design of space-time trellis codes (STTCs) for a cooperative relay channel operating in amplify-and-forward (AF) mode assuming the source and destination nodes are equipped with multiple antennas but the relay node has single antenna. We derive a pairwise error probability (PEP) expression for the performance of STTCs in this type of channels. A simple upper-bound on PEP is then derived and is maximized to find the optimum STTCs. We show that the designed STTCs based on the derived criterion achieve full diversity in the AF relay channels especially at high signal-to-noiseratios (SNRs). The maximum achievable diversity in relay channels with singleantenna relay is bounded by min(M, N ) where M and N are respectively the number of antennas in source and destination nodes. Simulation results confirm that the proposed codes achieve the maximum diversity and also provide an appealing coding gain.

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