Modeling of signal envelope correlation of line-of-sight fading with applications to frequency correlation analysis

Karasawa, Yoshio; Iwai, Hisato

doi:10.1109/26.293665

Cited by 29 publications

(22 citation statements)

References 3 publications

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“…It has been shown in Reference [3] that, for the Ricean model, the power correlation coefficient δ 1,1 is an accurate approximation to the envelope correlation coefficient δ 0.5,0.5 , statistic from which the coherence distance (or time) and the coherence bandwidth of the signal envelope are extracted. Based on this, the coherence parameters of the Ricean model can be well-evaluated directly from δ 1,1 .…”

Section: Coherence Parametersmentioning

confidence: 99%

“…In particular, References [3,4] present the correlation coefficient of two instantaneous powers (or squared envelopes). In Reference [4], both wide-band and narrow-band signals are analysed, and it is observed that the narrow-band model is sufficient for computing the space correlation coefficient within the range of 20% of the carrier frequency.…”

Section: Introductionmentioning

confidence: 99%

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Closed‐form generalised power correlation coefficient of Ricean channels

Mendes

Yacoub

Costa

2006

Trans Emerging Tel Tech

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SUMMARYExact, closed-form and general expressions of the marginal and joint moments as well as of the correlation coefficient of the instantaneous powers of two Ricean signals are derived. All statistics are expressed as finite sums of simple functions of the model parameters. The model includes environments where the Ricean factor and the mean power of one signal are different from their counterparts of the other signal. Some plots illustrate the generalised power correlation coefficient provided in this work. Coherence parameters are derived and practical values for system design are suggested.

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Section: Coherence Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Closed‐form generalised power correlation coefficient of Ricean channels

Mendes

Yacoub

Costa

2006

Trans Emerging Tel Tech

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“…The fading correlations between the S-R channel and the S-E one the R-D channel and the R-E one, and the R-D channel and the D-E one are ρ 1 , ρ 2 , and ρ 3 , respectively. Each fading correlation is derived by the following equation [7].…”

Section: ) Proposed System Modelmentioning

confidence: 99%

Performance evaluation of the physical layer security using artificial noise and relay station

Kabeya

Takyu

Ohtsuki

et al. 2015

2015 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA)

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In the physical layer security (PLS), the beam forming with multiple antennas enhances the received signal power at the legitimate user but suppresses it at the other users. The other users hardly demodulate the information without the bit error. However, if the channel state between the legitimate user and the other one is highly correlated, it is possible for the other users to demodulate the information signal. This paper proposes the novel secure communication system with utilizing the artificial noise and the relay station. When the legitimate user emits the artificial noise, the relay station receives the information bearing signal and the artificial noise. The other users cannot demodulate the information due to the interference of artificial noise. After the relay forwards the combined signal between the information bearing signal and the artificial noise to the legitimate user, the artificial noise is removed from the forwarded signal by the legitimate user. As a result, the legitimate user can demodulate the information. Therefore, the secure wireless communication can be constructed. This paper evaluates the secure capacity for the various location of eavesdropper and clarifies the validity of proposed system.

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“…In (10), the joint moment E{Ŵ n1 1Ŵ n2 2 } is found through (7a) and (9), whereas the marginal moments are obtained directly from (6). Since n 1 and n 2 are arbitrary positive integers, the power correlation coefficient provided here is rather general.…”

Section: Power Correlation Coefficientmentioning

confidence: 99%

“…All these statistics are obtained for both stationary 1 and nonstationary environments. It is widely known that, for the Rayleigh model [5] and for the Ricean model [6], the power correlation coefficient is a simple and accurate approximation to the envelope correlation coefficient, whose exact mathematical treatment is rather complicated. In fact, for the Rayleigh case, the well-known results of the coherence bandwidth and the coherence distance (or time) [5], two important parameters used as reference for the frequency separation and space separation in diversity systems, have been obtained from the power correlation coefficient instead of the envelope one.…”

mentioning

confidence: 99%