Joint Iterative Transmitter and Receiver Phase Noise Correction using Soft Information

Bittner, Steffen; Rave, Wolfgang; Fettweis, Gerhard

doi:10.1109/icc.2007.473

Cited by 18 publications

(11 citation statements)

References 11 publications

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“…In order to correct the CPE, a set of pilots P are used. Based on these pilots, the CPE can be estimated using least square estimation [9]:…”

Section: Clock Jitter Compensationmentioning

confidence: 99%

“…Assuming the Lorentzian shape of the spectrum due to Wiener process, estimating several low frequency spectral components of the phase noise process results in the approximation of the phase noise realization within an OFDM symbol [10]. Rewriting equation (14) into a vector matrix notation for a subset of C different received symbols R l1 up to R lC leads to the following set of linear equations [9]:…”

Section: Clock Jitter Compensationmentioning

confidence: 99%

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Clock jitter estimation and suppression in OFDM systems employing bandpass ΣΔ ADC

Fettweis

2009

2009 IEEE 10th Workshop on Signal Processing Advances in Wireless Communications

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In this paper, we analyze the effect of clock jitter on the performance of OFDM-based systems applying digital IF architecture. A bandpass ΣΔ ADC is used for the analog to digital conversion process. An accurate and realistic model of the clock jitter in bandpass ΣΔ ADC is implemented. Results from this paper show that clock jitter severely degrades OFDM system performance by introducing both phase and waveform noise. It is shown that for the case of sampling at IF stage, the effect of waveform noise is quite small and negligible compared to the phase noise effect. Therefore, an estimation and compensation method based on the existing phase noise compensation method is proposed for alleviating the effect of clock jitter. Simulation results are presented, showing the significant performance gain of our proposed algorithm, providing a new and innovative way of dealing with the clock jitter problem of bandpass A/D conversion in OFDM systems.Index Terms -Sigma-delta modulators, analog-to-digital conversion, clock jitter, signal-to-noise ratio.978-1-4244-3696-5/09/$25.00

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“…In order to correct the CPE, a set of pilots P are used. Based on these pilots, the CPE can be estimated using least square estimation [9]:…”

Section: Clock Jitter Compensationmentioning

confidence: 99%

Section: Clock Jitter Compensationmentioning

confidence: 99%

Clock jitter estimation and suppression in OFDM systems employing bandpass ΣΔ ADC

Fettweis

2009

2009 IEEE 10th Workshop on Signal Processing Advances in Wireless Communications

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“…In the literature, phase noise mitigation in OFDM systems has already been quite widely studied, e.g., in [7,[13][14][15][16][17][18]. In the literature, phase noise mitigation in OFDM systems has already been quite widely studied, e.g., in [7,[13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Analysis and mitigation of phase noise and sampling jitter in OFDM radio receivers

Syrjälä

Valkama

2010

Int. j. microw. wirel. technol.

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This article addresses the analysis and digital signal processing (DSP)-based mitigation of phase noise and sampling clock jitter in orthogonal frequency division multiplexing (OFDM) radios. In the phase noise studies, the basic direct-conversion receiver architecture case is assumed with noisy downconverting oscillator. In the sampling jitter case, on the other hand, the so-called direct-radio-frequency-sampling receiver architecture is deployed utilizing bandpass sub-sampling principle. The basis for the DSP-based impairment mitigation techniques is first formed using analytical receiver modeling with incoming OFDM waveform, where the effects of both oscillator phase noise and sampling clock jitter are mapped to certain type subcarrier cross-talk and distortion compared to ideal receiver case. Then iterative detection principles and interpolation techniques are developed to essentially estimate and cancel the subcarrier distortion. Also some related practical aspects, like channel estimation, are addressed. The performance of the proposed mitigation techniques is analyzed and verified with extensive computer simulations. In the simulations, realistic phase-locked-loop-based oscillator models are used for phase noise and sampling clock jitter. In addition, different received signal conditions like plain additive white Gaussian noise channel and extended ITU-R Vehicular A multipath channel are considered for practical purposes. Altogether the obtained results indicate that the effects of oscillator and sampling clock instabilities can be efficiently reduced using the developed signal processing techniques.

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“…The algorithm of the C-MMSPE algorithm for the joint data detection and PHN cancellation is summarized as below, where the superscript (l) denotes the corresponding parameters at the lth iteration, Φ is given by (11), P is the IFFT matrix, and accordingly Q and z defined in (10) and (9) are denoted as Q(ŝ (l−1) ) and…”

Section: The Algorithmmentioning

confidence: 99%

“…Discussion about the joint decoding and PHN cancellation can be found in literatures (e.g. [11]). Finally, we assume in this paper that the PHN is sufficiently small as otherwise it is beyond the capability of any existing signal processing approaches to cancel.…”

Section: Introductionmentioning

confidence: 99%

OFDM Joint Data Detection and Phase Noise Cancellation for Constant Modulus Modulations

Gong

Hong

2009

IEEE Trans. Signal Process.

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Joint Iterative Transmitter and Receiver Phase Noise Correction using Soft Information

Cited by 18 publications

References 11 publications

Clock jitter estimation and suppression in OFDM systems employing bandpass ΣΔ ADC

Clock jitter estimation and suppression in OFDM systems employing bandpass ΣΔ ADC

Analysis and mitigation of phase noise and sampling jitter in OFDM radio receivers

OFDM Joint Data Detection and Phase Noise Cancellation for Constant Modulus Modulations

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Joint Iterative Transmitter and Receiver Phase Noise Correction using Soft Information

Cited by 18 publications

References 11 publications

Clock jitter estimation and suppression in OFDM systems employing bandpass &#x03A3;&#x0394; ADC

Clock jitter estimation and suppression in OFDM systems employing bandpass &#x03A3;&#x0394; ADC

Analysis and mitigation of phase noise and sampling jitter in OFDM radio receivers

OFDM Joint Data Detection and Phase Noise Cancellation for Constant Modulus Modulations

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Clock jitter estimation and suppression in OFDM systems employing bandpass ΣΔ ADC

Clock jitter estimation and suppression in OFDM systems employing bandpass ΣΔ ADC