Peak-to-average power ratio and intersymbol interference reduction by nyquist pulse optimization

Châtelain, B.; Gagnon, François

doi:10.1109/vetecf.2004.1400162

Cited by 30 publications

(20 citation statements)

References 6 publications

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“…In a pure PAM system without the RRC filter, the PAPR is directly related to the PAM modulation order. However, the use of RRC filter at the transmitter will increase the PAPR with a reduced excess bandwidth or increased filter length [27]. The relationship between the PAPR of the QAM modulation and the RRC filter rolloff factor was studied for PAM-2 and QAM-32 in [27].…”

Section: Rrc Filters For Pam Transmissionsmentioning

confidence: 99%

PN-PAM scheme for short range optical transmission over SI-POF — an alternative to Discrete Multi-Tone (DMT) scheme

Peng

Liu

Hélard

et al. 2017

J. Eur. Opt. Soc.-Rapid Publ.

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Background: How to deal with the time-dispersive channel is the main challenge faced by the short-range optical communication systems. In this work a novel pseudo-noise sequence (PN) assisted pulse-amplitude modulated (PN-PAM) transmission scheme for short-range optical communication systems is proposed in this work. With the help of the PN based channel estimation, minimum-phase pre-filter and reduced-state sequence estimation based equalizer, the proposed PAM transmission scheme can significantly reduce the training overhead for channel estimation in the classical PAM systems using decision feedback equalizer (DFE). In addition, the proposed PAM transmission scheme can effectively avoid the error propagation phenomenon in the classical DFE. Results: Theoretical study shows that the proposed PAM scheme can achieve a 1.5 dB SNR gain with PAM-8 modulation over 50 m step-index polymer optical fiber (SI-POF) channel at a desired BER level of 1 × 10 −3 and 1.2 Gbps transmission rate. Furthermore the hardware experiment using commercially available components proves the improvements in the proposed PAM transmission scheme. Conclusion:The novel PAM transmission scheme is compared to the optimized discrete multi-tone (DMT) transmission with bit-loading. The experimental results show that for a transmission distance less than 50 m over SI-POF, DMT systems outperform the PAM systems. However, for a SI-POF transmission over the distance longer than 50 m, the proposed scheme can reach a better performance than the DMT systems thanks to the advantage of a lower peak-to-average-power ratio.

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Section: Rrc Filters For Pam Transmissionsmentioning

confidence: 99%

PN-PAM scheme for short range optical transmission over SI-POF — an alternative to Discrete Multi-Tone (DMT) scheme

Peng

Liu

Hélard

et al. 2017

J. Eur. Opt. Soc.-Rapid Publ.

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“…The data is first filtered in an RRC filter [37]. The purpose of the RRC filter is to reduce out of channel spectral emissions with a limited impact on the peak-to-average power ration (PAPR) [37,38] and intersymbol interference (ISI) [38]. In this work an RRC filter implemented in Verilog-A with a roll off factor equal to 0.22, from the Cadence library rfLib, has been used.…”

Section: System Simulation Setupmentioning

confidence: 99%

System simulations of a 1.5 V SiGe 81–86 GHz E-band transmitter

Tired

Sandrup

Nejdel

et al. 2016

Analog Integr Circ Sig Process

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This paper presents simulation results for a sliding-IF SiGe E-band transmitter circuit for the 81-86 GHz E-band. The circuit was designed in a SiGe process with f T = 200 GHz and uses a supply of 1.5 V. The low supply voltage eliminates the need for a dedicated transmitter voltage regulator. The carrier generation is based on a 28 GHz quadrature voltage oscillator (QVCO). Upconversion to 84 GHz is performed by first mixing with the QVCO signals, converting the signal from baseband to 28 GHz, and then mixing it with the 56 GHz QVCO second harmonic, present at the emitter nodes of the QVCO core devices. The second mixer is connected to a threestage power amplifier utilizing capacitive cross-coupling to increase the gain, providing a saturated output power of ?14 dBm with a 1 dB output compression point of ?11 dBm. E-band radio links using higher order modulation, e.g. 64 QAM, are sensitive to I/Q phase errors. The presented design is based on a 28 GHz QVCO, the lower frequency reducing the phase error due to mismatch in active and passive devices. The I/Q mismatch can be further reduced by adjusting varactors connected to each QVCO output. The analog performance of the transmitter is based on ADS Momentum models of all inductors and transformers, and layout parasitic extracted views of the active parts. For the simulations with a 16 QAM modulated baseband input signal, however, the Momentum models were replaced with lumped equivalent models to ease simulator convergence. Constellation diagrams and error vector magnitude (EVM) were calculated in MATLAB using data from transient simulations. The EVM dependency on QVCO phase noise, I/Q imbalance and PA compression has been analyzed. For an average output power of 7.5 dBm, the design achieves 7.2% EVM for a 16 QAM signal with 1 GHz bandwidth. The current consumption of the transmitter, including the PA, equals 131 mA from a 1.5 V supply.

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“…The introduced linear combination constant adds an additional degree of freedom to minimize PAPR for a given roll-off factor, because to reduce PAPR at the transmitter side, we need to design a pulse shaping filter with reduced tail size [8,16]. The impulse responses of the PLP and RC pulses are given in [12], and are inserted into (2) to obtain the impulse response of the proposed Nyquist linear combination pulse (NLCP) as follows…”

Section: Nyquist Linear Combination Pulsesmentioning

confidence: 99%

“…1, it can be inferred that by selecting the proper value of p, smaller relative magnitudes in the two largest sidelobes can be obtained. And according to [8,10,16], PAPR reduction is achieved by minimizing the amplitudes of the two largest sidelobes. The proposed family of pulses maintains the same bandwidth compared to that of the RC pulse for a roll-off factor α and different values of p; therefore does not introduce additional out-of band radiation into the transmitted signals, which is a major concern in the design of pulse shaping filters.…”

Section: Nyquist Linear Combination Pulsesmentioning

confidence: 99%

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PAPR reduction by pulse shaping using Nyquist linear combination pulses

Azurdia-Meza

Lee

2012

IEICE Electron. Express

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Peak-to-average power ratio (PAPR) plays an important role in the design of wireless communication systems because a high PAPR decreases the efficiency of the power amplifier. A new family of Nyquist pulses was derived by applying a linear combination between two Nyquist pulses. The proposed Nyquist pulses are utilized for pulse shaping to reduce PAPR. The investigated pulses are characterized by a new design parameter (p), giving an additional degree of freedom to minimize PAPR for a given roll-off factor α. While keeping the same bandwidth, the frequency responses of the proposed filters are unique with different values of the parameter p. Simulations showed that the optimum proposed pulse shaping filters provide better performance in PAPR reduction compared to those of the RC filter and other existing filters evaluated in various systems. Keywords: Nyquist's first criterion, peak-to-average power ratio (PAPR), power amplifier Classification: Microwave and millimeter wave devices, circuits, and systems References[1] J. Choi, D. Kang, D. Kim, J. Park, B. Jin, and B. Kim, "Power Amplifiers and Transmitters for Next Generation Mobile Handsets," J. Semiconductor Technology and Science, vol. 9, no. 4, pp. 249-256, Dec. 2009. [2] H. G. Myung, J. Lim, and D. J. Goodman, "Single carrier FDMA for uplink wireless transmission," IEEE Veh. Technol. Mag., vol. 1, no. 3, pp. 30-38, Sept. 2006. [3] H. G. Myung, J. Lim, and D. J. Goodman, "Peak-to-average power ratio of single carrier FDMA with pulse shaping,"

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Peak-to-average power ratio and intersymbol interference reduction by nyquist pulse optimization

Cited by 30 publications

References 6 publications

PN-PAM scheme for short range optical transmission over SI-POF — an alternative to Discrete Multi-Tone (DMT) scheme

PN-PAM scheme for short range optical transmission over SI-POF — an alternative to Discrete Multi-Tone (DMT) scheme

System simulations of a 1.5 V SiGe 81–86 GHz E-band transmitter

PAPR reduction by pulse shaping using Nyquist linear combination pulses

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