Diversity and MIMO for efficient front-end design of body-centric wireless communications devices

Khan, Imdad; Ghanem, Khalida; Hall, Peter

doi:10.1049/pbte065e_ch8

Cited by 5 publications

(18 citation statements)

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“…The off-body technology deals with the communication link between devices mounted on the body, and other devices, or access points, away from the body [1]. It found applications in the industrial, entertainment, sport, and medical fields.…”

Section: Introductionmentioning

confidence: 99%

Off-body LOS and NLOS channel characterization in a mine environment

Azhari¹,

Nedil²,

Alj

et al. 2015

2015 International Conference on Electrical and Information Technologies (ICEIT)

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In this paper, the off-body performance of a singleinput single-output (SISO) system was evaluated in Non-Lineof-Sight (NLOS) situations and compared with measurements done with a clear Line of Sight (LOS) link. The obstructed link study takes into account the human shadowing effect, usually caused by close by miners interrupting the transmitter-receiver link. Measurement campaigns were performed using Monopole antennas in an underground gold mine. The off-body channels were characterized in terms of the channel impulse response, RMS delay spread, and coherence bandwidth. The channel capacity was determined using the well-known Shannon formula for LOS and NLOS situations. The variation of the channel parameters in the different measurement scenarios was analyzed.

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Section: Introductionmentioning

confidence: 99%

Off-body LOS and NLOS channel characterization in a mine environment

Azhari¹,

Nedil²,

Alj

et al. 2015

2015 International Conference on Electrical and Information Technologies (ICEIT)

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“…The long-term fading envelope which results from the path loss and shadowing effects represents the local average power of the received signal [14] and is superimposed on the short-term fading corresponding to the contribution of the multipath components. It is usually assumed that the long-term fading is a multiplicative factor to the received signal envelope [11]- [13], [19] (1)…”

Section: Measurement Setup and Channel Characterizationmentioning

confidence: 99%

“…where is the received signal envelope, is the short-term fading envelope, and is the long-term fading component defined as follows [11]- [13], [19] (2)…”

Section: Measurement Setup and Channel Characterizationmentioning

confidence: 99%

Effect of Channel Correlation and Path Loss on Average Channel Capacity of Body-to-Body Systems

Ghanem

2013

IEEE Trans. Antennas Propagat.

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The channel capacity in body channels is of great importance since it determines the amount and type of data that can be transmitted using the body as a media for communication. In this communication, the average capacity of body-to-body channels, where the transmitter and the receiver are on different human bodies, is investigated in an indoor wireless environment when using multiple antennas at the transmitter and the receiver, the so-called MIMO system. Different types of antennas are studied, namely PIFA, inverted IFA and monopole antennas, and the capacity in these channels is compared to on-body case. The impingement of the spatial correlation due to the presence of a high line of sight (LOS) component, on the average capacity is also studied. The effect of path loss on average capacity is asserted as well.Index Terms-Body-to-body channels, channel capacity, multiple-input multiple-output (MIMO), on-body channels.

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“…Many of these envisioned applications involve body-worn sensors, resulting in the so-called wireless body area networks (WBAN) [7]. WBAN refers to the wireless communication technology encompassing the propagation at the On-body, Off-body, and In-body channels [8,9]. In the On-body channel, the transmitter and receiver are on the human body surface; whereas in the in-body channel the transmitter is within the body [9].…”

Section: Introductionmentioning

confidence: 99%

“…WBAN refers to the wireless communication technology encompassing the propagation at the On-body, Off-body, and In-body channels [8,9]. In the On-body channel, the transmitter and receiver are on the human body surface; whereas in the in-body channel the transmitter is within the body [9]. In the Off-body channel, which is the topic of this paper, the transmitter is located on the body, whilst the receiver is in the vicinity of the body.…”

Section: Introductionmentioning

confidence: 99%