Self-Heterodyne OFDM Transmission for Frequency Selective Channels

Fernando, Nirmal; Hong, Yi; Viterbo, Emanuele

doi:10.1109/tcomm.2013.021913.120510

Cited by 17 publications

(36 citation statements)

References 29 publications

(46 reference statements)

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“…al. proposed self-heterodyne OFDM (self-het OFDM) in [6], [7] as an alternative OFDM technique to compensate these high-level oscillator instabilities in 60 GHz RF bands. In self-het OFDM, the transmitter sends both the local RF carrier and the OFDM subcarriers, and a square-law circuitry (self-mixing) is used at the receiver to down-convert the RF signal.…”

Section: Conventionalmentioning

confidence: 99%

MIMO Self-Heterodyne OFDM using SCP with Noise

Prasanthi¹,

Krishna²

2017

IJCA

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Heterodyning, also known as frequency conversion, used widely in communication engineering to generate new frequencies and move information from one frequency channel to another. In this paper, we are proposing a multipleinput multiple-output (MIMO) self-het OFDM with the adaptive smart carrier position (SCP) technique. At the transmitter, a space-time block code (STBC) is used to produce the coded information symbols to be transmitted on each antenna over the self-het OFDM subcarriers. At the receiver, a simple non-linear detection is adopted at each receiver communication side. The achievable diversity order of such setting is analyzed, and it is found that with the adaptation of SCP technique, the diversity loss in comparison to the conventional coherent MIMO-OFDM can be compensated. Our approach helps in minimising the error floor, phase noise and fading occuring at the reciever.

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Section: Conventionalmentioning

confidence: 99%

MIMO Self-Heterodyne OFDM using SCP with Noise

Prasanthi¹,

Krishna²

2017

IJCA

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“…Since the local RF carrier signal is embedded in the received signal, this down-conversion does not involve any local carrier generation, carrier frequency correction, and carrier phase recovery at the receiver. If the guard band B g satisfies B g ≥ B x , the information can be recovered completely by only considering the N x OFDM subcarriers, as shown in [11]. It was also shown in [11] that, since the non-linear down-conversion generates high frequency and DC components, a low pass filter (LPF) with a cutoff frequency B g + B x and a DC filter are used before the sampling and the analog-to-digital conversion (ADC).…”

Section: Self-het Ofdm Receivermentioning

confidence: 99%

“…If the guard band B g satisfies B g ≥ B x , the information can be recovered completely by only considering the N x OFDM subcarriers, as shown in [11]. It was also shown in [11] that, since the non-linear down-conversion generates high frequency and DC components, a low pass filter (LPF) with a cutoff frequency B g + B x and a DC filter are used before the sampling and the analog-to-digital conversion (ADC). Then, the CP removal, serial-to-parallel conversion and the FFT operation are performed to recover the information symbols carried over the N x OFDM subcarriers, as illustrated in Fig.…”

Section: Self-het Ofdm Receivermentioning

confidence: 99%

“…The equivalent discrete baseband model of self-het OFDM under multipath fading channels can be written as [11] …”

Section: Self-het Ofdm Receivermentioning

confidence: 99%

“…Smart carrier positioning (SCP): It was shown in [11] that the entire OFDM symbol subjects to an outage, if the local RF carrier experiences deep fading. In the SCP, the receiver estimates the optimum RF carrier location (i.e.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

Fernando

Hong

Viterbo

2013

2013 Australian Communications Theory Workshop (AusCTW)

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In this paper, we consider two enhancements for self-heterodyne OFDM (Self-Het OFDM): subcarrier pairing and smart carrier positioning (SCP). We analyze their performance over a practical 60 GHz indoor RF channel. This channel deviates from the standard AWGN and Rayleigh fading models for Line of Sight (LoS) and Non LoS. We show that for NLoS channels they can jointly improve the diversity order and performance by 7.7 dB at BER of 10 −2 , when compared to the standard self-het OFDM. Similar improvements are observed for channels with strong LoS components.

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Subcarrier pairing for self-heterodyne OFDM

Fernando

Hong

Viterbo

2013

2013 IEEE International Conference on Communications (ICC)

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In this paper, we present a subcarrier pairing scheme to improve the overall error performance of selfheterodyne (self-het) OFDM communications. The proposed pairing scheme exploits the average signal-to-interference-to noise ratios (SINRs) imbalance experienced among self-het OFDM subcarriers. At the transmitter, two simple operations, symbol constellation rotation and component interleaving, are performed before pairing the good and the bad OFDM subcarriers, and maximum likelihood detection is used at the receiver to decode the information. The simulation results show that the proposed pairing scheme improves the system performance by 2.5 dB and 0.6 dB for Rayleigh fading and AWGN channels at bit error rate (BER) of 10 −3 , respectively, without any coding overhead. In addition, we show that, in the presence of phase noise, self-het OFDM using the proposed pairing scheme outperforms the conventional OFDM schemes with superheterodyne receiver structures.

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Self-Heterodyne OFDM Transmission for Frequency Selective Channels

Cited by 17 publications

References 29 publications

MIMO Self-Heterodyne OFDM using SCP with Noise

MIMO Self-Heterodyne OFDM using SCP with Noise

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

Subcarrier pairing for self-heterodyne OFDM

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