Analysis of Self-Het OFDM enhancements for 60GHz indoor RF channels

Fernando, Nirmal; Hong, Yi; Viterbo, Emanuele

doi:10.1109/ausctw.2013.6510058

Cited by 4 publications

(3 citation statements)

References 18 publications

(37 reference statements)

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“…η opt ) that minimizes the BER. This η opt can be obtained by solving (27) numerically. We also note that, in Fig.…”

Section: Simulation Resultsmentioning

confidence: 99%

“…Hence, self-het OFDM is a promising solution to low complexity mobile communication systems using large unlicensed RF spectrum in millimeter/terahertz communication. We also demonstrate the performance of enhanced selfhet OFDM over 60 GHz indoor RF channels in [27].…”

Section: Discussionmentioning

confidence: 98%

“…The optimum η opt can be selected by substitutingγ given in (25) to (22) (27) and find η opt for both cases. Substituting corresponding η opt in (18) and (22) yields the optimum theoretical BER for standard and enhanced self-het OFDMs, which will be simulated in the following section.…”

Section: B Power Allocation Between the Carrier And Ofdm Subcarriersmentioning

confidence: 99%

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Self-Heterodyne OFDM Transmission for Frequency Selective Channels

Fernando

Hong

Viterbo

2013

IEEE Trans. Commun.

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Abstract-Self-heterodyne OFDM (self-het OFDM) is known to provide complete immunity against frequency-offset and phase noise, with a much lower RF frontend complexity, when compared to conventional OFDM techniques. Self-het OFDM is considered to be a promising physical layer technology for millimeter-wave RF communications, where the implementation of low complexity stable oscillators is technically difficult. Although self-het OFDM has great potential, it has only been studied for additive white Gaussian noise and two-ray channel models. In this paper, we analyze the performance of self-het OFDM for general frequency selective channels and show that the standard self-het OFDM undergoes an outage if the RF carrier is affected by deep fading. In order to avoid this, we introduce a new technique called smart carrier positioning. We show both analytically and by simulation that the smart carrier positioning can improve the diversity order and the performance of standard self-het OFDM by approximately 4dB at bit error rate of 10 −2 . In addition, we investigate the optimum power allocation between the carrier and the OFDM subcarriers under frequency selective conditions.

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“…η opt ) that minimizes the BER. This η opt can be obtained by solving (27) numerically. We also note that, in Fig.…”

Section: Simulation Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 98%

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Self-Heterodyne OFDM Transmission for Frequency Selective Channels

Fernando

Hong

Viterbo

2013

IEEE Trans. Commun.

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A Millimeter-Wave Self-Mixing Array With Large Gain and Wide Angular Receiving Range

Kornprobst

Mittermaier

Eibert

2018

IEEE Trans. Antennas Propagat.

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The concept of self-mixing antenna arrays is presented and analyzed with respect to its beneficial behavior of large gain over a wide angular range. The large gain is attained by an antenna array with large element spacing, where all array element signals are combined approximately coherently over the entire angular receiving range. This functionality is achieved by the self-mixing principle, where an exact description via an intermediate frequency (IF) array factor is derived. For verification purposes, a 4 × 2 self-mixing array is fabricated and measured in the frequency range from 34 GHz to 39 GHz. A multiple-resonances millimeter-wave microstrip patch antenna has been especially developed to achieve large bandwidth and a wide angular receiving range. The broad beamwidth is achieved by two parasitic patches and suitable radiation characteristics of the resonant modes. The self-mixing of the receive signal is realized at each antenna element by a Schottky diode with an optimized operating point. The down-converted array element signals are then combined and measured at the IF. The receive power is increased significantly over a large angular range as compared to conventional array feeding techniques. The simulation results are verified by measurements, which show very good agreement.Index Terms-Active antenna arrays, broad bandwidth, frontend circuitry, intermediate frequency (IF) beamforming, microstrip patch antenna, nonreciprocal receiving antenna, wide beamwidth. I. INTRODUCTIONF OR THE increasing demand of ever-expanding data rates in wireless communications, millimeter-wave (mm-wave) frequencies are widely investigated, e.g. for the fifth generation mobile communication standard [1]-[3] or the Wifi standard WiGig [4], [5]. Data links at such high radio frequencies (RF) enable higher data rates, corresponding to an increased channel capacity obtained by the utilization of wide-band radio channels. Yet, mm-wave communication suffers significantly from the high path loss according to the Friis transmission equation [6]. Therefore, antennas or antenna arrays should have a large gain to compensate for the path loss [7]- [10].

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A non-reciprocal receive array with large beamwidth and gain

Kornprobst

Mittermaier

Eibert

2018

2018 11th German Microwave Conference (GeMiC)

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A non-reciprocal self-mixing receive antenna array is presented. First, the principle of the self-mixing concept is explained and it is found that self-mixing receivers achieve a large gain over a wide angular range, which is in contrast to reciprocity. In the second part, the design of a 4×2 antenna array operating from 34 GHz to 39 GHz including the receive amplifier and mixer is introduced. Measurements in an anechoic chamber verify the simulation results, showing promising results for future applications of self-mixing arrays with a wide angular receiving range.

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Analysis of Self-Het OFDM enhancements for 60GHz indoor RF channels

Cited by 4 publications

References 18 publications

Self-Heterodyne OFDM Transmission for Frequency Selective Channels

Self-Heterodyne OFDM Transmission for Frequency Selective Channels

A Millimeter-Wave Self-Mixing Array With Large Gain and Wide Angular Receiving Range

A non-reciprocal receive array with large beamwidth and gain

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