Error rate estimation in a multi-channel active phased array

Maalouf, K.J.; Gaus, R.; Sowelam, Sameh M.; Jacomb-Hood, A.

doi:10.1109/icc.1998.682882

Cited by 5 publications

(2 citation statements)

References 2 publications

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“…Thus, to reduce size, cost and power consumption of the BS, multicarrier power amplifiers (MCPA) have been suggested for use in cellular systems [11]. For satellite systems, where small equipment size and low power consumption is of high importance, the combination of MCPA and array antennas has been utilized for a long time [12], [13], [14].…”

Section: Introductionmentioning

confidence: 99%

Effects of nonlinear distortion on switched multibeam FDMA systems

Wennstrom¹,

Oberg²,

Rydberg

2003

IEEE Trans. Antennas Propagat.

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The effects of using an multicarrier amplifier (MCPA) in the transmit chain of a cellular FDMA system utilizing switched multibeam base-station antennas is investigated. By combining several carriers prior to amplification, the signal envelope will be time varying and the MCPA will introduce non-linear distortion of the amplified waveforms. It is shown how the main beam direction and frequency of any intermodulation product of any order can be calculated and a frequency allocation scheme is presented that reduces the intermodulation distortion at the mobile users. By Monte Carlo simulations, the probability distribution function of the received intermodulation distortion power is estimated, assuming a GSM system, as a function of the number of antenna elements and the number of active users. Comparisons with a one-element reference antenna is made, and it is shown that the received intermodulation distortion power for the users in the system is substantially reduced when the number of beams are increased or the user activity is reduced.

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Section: Introductionmentioning

confidence: 99%

Effects of nonlinear distortion on switched multibeam FDMA systems

Wennstrom¹,

Oberg²,

Rydberg

2003

IEEE Trans. Antennas Propagat.

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“…The transmission impairment mechanisms associated with such systems are subsequently addressed. Other and similar characterizations of the transmission mechanisms, interference parameters and bit error analyses were reported (Maalouf et al, 1998), (Purdy & Lier, 2000), (Lier & Maalouf, 2003), (Maalouf & Lier, 2004). Of special interest is the analysis of intermodulation components that result from multicarrier operation of active phased arrays (Sandrin, 1973), (Lier & Charrette, 2005).…”

Section: Introductionmentioning

confidence: 99%

System Aspects of Active Phased Arrays

Zaghloul¹,

Kıłıc²,

C.³

2010

Satellite Communications

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Intermodulation distortion in switched multibeam antennas for cellular radio systems

Wennstrom

Rydberg²,

Oberg³

11th IEEE International Symposium on Personal Indoor and Mobile Radio Communications. PIMRC 2000. Proceedings (Cat. No.00TH8525

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The performance of switched multibeam antennas for cellular radio systems is investigated when the transmit amplifier is of a multicarrier (MCPA) type. The MCPA nonlinearity generates intermodulation distortion in the transmitted signal that is spatially filtered by the array radiation pattern. Hence, the intermodulation distortion becomes direction-dependent, and the direction of the generated intermodulation products of any order is derived. It is shown by using Monte Carlo simulations how the downlink carrier to interference ratio depends on the frequency reuse distance and on the MCPA linearity measured as its noise power ratio (NPR). For reuse factor one systems, which is made possible by use of multibeam antennas, the linear co-channel interference dominates the interference. On the contrary, for a reuse factor seven system it is shown that a weak nonlinearity directly gives a degradation in carrier to interference ratio (CIR) due to intermodulation distortion. However the reuse factor seven system has a large CIR overhead due to the increase in CIR using a multibeam antenna, and the outage probability is thereby only slightly affected.

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Error rate estimation in a multi-channel active phased array

Cited by 5 publications

References 2 publications

Effects of nonlinear distortion on switched multibeam FDMA systems

Effects of nonlinear distortion on switched multibeam FDMA systems

System Aspects of Active Phased Arrays

Intermodulation distortion in switched multibeam antennas for cellular radio systems

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