Reverse link capacity and coverage improvement for CDMA cellular systems using polarization and spatial diversity

Aydın, Levent; Esteves, E.; Padovani, R.

doi:10.1109/icc.2002.997176

Cited by 14 publications

(15 citation statements)

References 6 publications

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“…For that purpose, we verify that (19) where the first equality is due to (15). Therefore, at , the resultant electrical field (20) where is due to (18), is because of the definition of , and is from (17). Further, we can derive from (19) that for any .…”

Section: Proof Of Independence Of the Polarizationmentioning

confidence: 99%

“…Polarization diversity in communications has also been well studied in the literature [17]- [22]. Classical wireless communications relies on one channel per frequency, although it is well understood that the two polarization states of planar waves allow two distinct information channels; techniques such as polarization diversity already take advantage of this.…”

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confidence: 99%

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Optimal Polarized Beampattern Synthesis Using a Vector Antenna Array

Jian

Nehorai

2009

IEEE Trans. Signal Process.

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Abstract-Using polarized waveforms increases the capacity of communication systems and improves the performance of active sensing systems such as radar. We consider the optimal synthesis of a directional beam with full polarization control using an array of electromagnetic vector antennas (EMVA). In such an array, each antenna consists of p 2 orthogonal electric or magnetic dipole elements. The control of polarization and spatial power patterns is achieved through carefully designing the amplitudes and phases of the weights of these dipole antennas. We formulate the problem in a convex form, which is thus efficiently solvable by existing solvers such as the interior point method. Our results indicate that vector antenna arrays not only enable full polarization control of the beampattern, but also improve the power gain of the main beam (over the sidelobes), where the gain is shown numerically to be linearly proportional to vector antenna dimensionality p. This implies that EMVA not only offers the freedom to control the beampattern polarization, but also virtually increases the array size by exploiting the full electromagnetic (EM) field components. We also study the effect of polarization on the spatial power pattern. Our analysis shows that for arrays consisting of pairs of electrical and magnetic dipoles, the spatial power pattern is independent of the mainbeam polarization constraint.

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Section: Proof Of Independence Of the Polarizationmentioning

confidence: 99%

mentioning

confidence: 99%

Optimal Polarized Beampattern Synthesis Using a Vector Antenna Array

Jian

Nehorai

2009

IEEE Trans. Signal Process.

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“…Space-time codes have been shown to be robust against nonideal operating conditions such as antenna correlation, channel estimation errors, and Doppler effects [16], [17]. We also note that field tests have been conducted in real mobile wireless environments to explore the benefits of increased diversity order using spatially separated polarized antennas at the base station receiver of a code-division multiple-access (CDMA) cellular system [18].…”

Section: Instantaneous Radar Polarimetrymentioning

confidence: 99%

A Simple Signal Processing Architecture for Instantaneous Radar Polarimetry

Howard

Calderbank

Moran

2007

IEEE Trans. Inform. Theory

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Abstract-This paper describes a new radar primitive that enables instantaneous radar polarimetry at essentially no increase in signal processing complexity. This primitive coordinates transmission of distinct waveforms on orthogonal polarizations and applies a unitary matched filter bank on receive. This avoids the information loss inherent in single-channel matched filters. A further advantage of this scheme is the elimination of range sidelobes.

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“…If the multipath spread is smaller than the inverse of the bandwidth of the information-bearing signal, i.e., smaller than the duration of a transmitted symbol, then the fading is said to be frequency-non-selective or flat fading [7]. [10] proposes a model for a Rayleigh fading channel with the required spectral properties based on a sum of sinusoids which is used in this paper. Based on these concepts, the channel gain, h g , is calculated as [7]     10 1 10 ,…”

Section: System Modelmentioning

confidence: 99%

A New Approach for Wireless Cellular Network Design

Saghaei¹,

Saghaei²,

Darvishi³

2013

IJCNS

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Wise arrangement of antennas is critical in wireless cellular systems for both reduction of co-channel interference (CCI) and increase the quality of service (QoS). In this paper, a novel architecture for antenna arrangement in CDMA wireless cellular systems is presented. In this architecture that we called Microzone, every cell is divided into three (or more) zones and information transmission in downlink channel is done by an antenna which is placed at the outer region of the related zone. Also, the transmitting signal by the mobile station (MS) in uplink channel is received by all the antennas of the related cell. Analytical calculations of the received signal to noise ratio (SIR) and outage probability for both microzone and used architectures show that proposed architecture has better performance in compared with the used architecture. Also, simulation results confirm lower outage probability in uplink channel for microzone architecture.

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Reverse link capacity and coverage improvement for CDMA cellular systems using polarization and spatial diversity

Cited by 14 publications

References 6 publications

Optimal Polarized Beampattern Synthesis Using a Vector Antenna Array

Optimal Polarized Beampattern Synthesis Using a Vector Antenna Array

A Simple Signal Processing Architecture for Instantaneous Radar Polarimetry

A New Approach for Wireless Cellular Network Design

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