Generalized Mutual Information Analysis for BICM-8QAM With Residual Phase Noise

Wang, Qian; Quan, Zhi; Bi, Suzhi; Chen, Yu; Kam, Pooi Yuen

doi:10.1109/lcomm.2021.3115233

Cited by 6 publications

(3 citation statements)

References 17 publications

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“…The HWIs are usually compensated during offline calibration or online with dedicated signals and routines, depending on whether the impairment is static or time-variant. In this work, we model all the HWIs except the PAN as random perturbations around the nominal values that correspond to the residual errors for time-variant impairments (i.e., PN and CFO) after calibration [34]- [36], and corresponding to an ensemble of devices for static impairments (i.e., MC [37], AGE [38], ADE [18], and IQI [22]). The PAN is fixed in order to evaluate the effect of different types of pilot signals.…”

Section: Hardware Impairmentsmentioning

confidence: 99%

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Modeling and Analysis of OFDM-Based 5G/6G Localization Under Hardware Impairments

Chen,

Keskin,

Aghdam

et al. 2024

IEEE Trans. Wireless Commun.

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Localization is envisioned as a key enabler to satisfy the requirements of communications and context-aware services in the fifth/sixth generation (5G/6G) communication systems. User localization can be achieved based on delay and angle estimation using uplink/downlink pilot signals. However, hardware impairments (HWIs) (such as phase noise and mutual coupling) distort the signals at both the transmitter and receiver sides and thus affect the localization performance. While this impact can be ignored at lower frequencies with less severe HWIs, and less stringent localization requirements, modeling and analysis efforts are needed for high-frequency bands to assess degradation in localization accuracy due to HWIs. In this work, we model various types of impairments for a mmWave multiple-input-multiple-output communication system and conduct a misspecified Cramér-Rao bound analysis to evaluate HWIinduced performance losses in terms of angle/delay estimation and the resulting 3D position/orientation estimation error. We also investigate the effect of individual and overall HWIs on communications in terms of symbol error rate (SER). Our extensive simulation results demonstrate that each type of HWI leads to a different level of degradation in angle and delay estimation performance, and the prominent impairment factors on delay estimation will have a dominant negative effect on SER.

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Section: Hardware Impairmentsmentioning

confidence: 99%

“…shown in (34), the beamspace tensor-based ESPRIT method can then be used to estimate ω 1 to ω 5 and obtain the AOA, AOD, and delay accordingly [6], [11].…”

Section: B Channel Parameters Estimationmentioning

confidence: 99%

Modeling and Analysis of OFDM-Based 5G/6G Localization Under Hardware Impairments

Chen,

Keskin,

Aghdam

et al. 2024

IEEE Trans. Wireless Commun.

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show abstract

“…1 (d) [25]. Although the star-8QAM signal can also be Gray coded and may be more widely used in the practical transmissions, the rectangular 8QAM signal has also been investigated hotly in the under water VLC, flexible orthogonal frequency division multiple access-passive optical network (OFDMA-PON), bit-interleaved coded modulation (BICM) channel, asymmetric constellation transmission in coherent FSOC with spatial diversity, asymmetric pair mapping over a seven core fiber and other scenarios [19], [21], [26]- [28]. Additionally, under the lower code rate, the rectangular 8QAM signal presents better performance than the other types of 8QAM signals [29].…”

Section: Introductionmentioning

confidence: 99%

All-Optical Format Conversion for Rectangular 8QAM Signals Based on Phase-Sensitive Amplification and Nonlinear Mach-Zehnder Interferometer

Li,

Yang,

Wen

et al. 2024

IEEE Photonics J.

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An all-optical format conversion (AOFC) scheme for the input 30 Gbit/s rectangular 8-ary quadrature amplitude modulation (8QAM) signal is proposed and numerically investigated based on phase-sensitive amplification (PSA) and nonlinear Mach-Zehnder interferometer (MZI). Firstly, the input rectangular 8QAM signal is orthogonal decomposed into the inphase and quadrature components based on PSA, respectively. The in-phase component is the 4-ary amplitude and phase shift keying (4APSK) signal and the quadrature component is the binary phase shift keying (BPSK) signal. Secondly, the converted 4APSK signal is transmitted into one piece of highly nonlinear fiber (HNLF) to obtain the phase-distorted two-amplitude and two-phase (2A-2P) signal based on the self-phase modulation (SPM) effect. After adjusting the power of the 2A-2P signal, it is injected into one nonlinear MZI to eliminate the amplitude difference of the inner and the outer rings of the 2A-2P signal. The 2A-2P signal can be converted into the regular quadrature phase shift keying (QPSK) signal by the nonlinear MZI with phase preservation. Thirdly, the converted BPSK and QPSK signals are coherently superposed in one 3-dB optical coupler (OC) to get the aggregated rectangular 8QAM signal and other types of 8QAM signals. The proposed scheme can also be extended to realize the AOFC from the 16-ary quadrature amplitude modulation (16QAM) signal to two QPSK signals. The constellation diagrams, amplitude and phase histograms, error vector magnitude (EVM) and bit error rate (BER) of the relevant optical signals are measured to evaluate the system performance. The proposed scheme can be equipped with the optical gateway to enable all-optical interconnection of optical networks with different modulation formats.

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Flexible All-Optical 8QAM Signal Format Conversion Using Pump Assisted Nonlinear Optical Loop Mirror

Yang

Wen

et al. 2023

J. Lightwave Technol.

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Generalized Mutual Information Analysis for BICM-8QAM With Residual Phase Noise

Cited by 6 publications

References 17 publications

Modeling and Analysis of OFDM-Based 5G/6G Localization Under Hardware Impairments

Modeling and Analysis of OFDM-Based 5G/6G Localization Under Hardware Impairments

All-Optical Format Conversion for Rectangular 8QAM Signals Based on Phase-Sensitive Amplification and Nonlinear Mach-Zehnder Interferometer

Flexible All-Optical 8QAM Signal Format Conversion Using Pump Assisted Nonlinear Optical Loop Mirror

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