Cochannel interference cancellation by base station adaptive array in uncorrelated Rayleigh fading channel

Katoh, Yoshihisa; Ohgane, Takeo; Ogawa, Yasutaka; Itoh, Kiyohiko

doi:10.1002/(sici)1520-6424(200005)83:5<97::aid-ecja10>3.0.co;2-k

Cited by 4 publications

(3 citation statements)

References 6 publications

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“…Moreover, if other MSs use the same channel, the desired signal is interfered by other MSs' signals. As a result, these cause degradation of spectral efficiency in down-link [8] [9]. In order to improve mobility performance of TDD-AAA/SDMA system, we think that applying AAA to a MS is effective.…”

Section: Introductionmentioning

confidence: 99%

Experiment and Simulation Results of Adaptive Antenna Array System at Base and Mobile Stations in Mobile Environment

Kenta¹,

Chiharu²,

Kato³

et al. 2007

IEICE Transactions on Communications

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In a time division duplex (TDD) based adaptive array antenna (AAA)/space division multiple access (SDMA) system, the array weights determined from up-link signals can be applied to the down-link transmission because of the channel reciprocity. However, under fast fading conditions, for example due to fast moving mobile station (MS), the array weights are no longer optimum for the down-link signal transmission and hence the spectral efficiency of the system degrades in down-link. In this paper, we present the computer simulation and field experiment down-link performance of MS with two antenna elements moving at various velocities in the field trial system of i-Burst, which is a wireless broadband system employing AAA and SDMA techniques. Both the results show that adaptive antenna processing at MS is effective in improving the mobility performance of TDD-AAA/SDMA system.

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Section: Introductionmentioning

confidence: 99%

Experiment and Simulation Results of Adaptive Antenna Array System at Base and Mobile Stations in Mobile Environment

Kenta¹,

Chiharu²,

Kato³

et al. 2007

IEICE Transactions on Communications

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“…Another cause of bit errors in cellular systems is co-channel interference produced by spatial reuse of the same radio frequency at separated cells. Adaptive array antenna (AAA) has been receiving increased attention with development of mobile communication [ l]- [3]. Generally, AAA is used as a measure against cochannel interference, on the other hand, space diversity antenna is used against fading.…”

Section: Introductionmentioning

confidence: 99%

Performance of adaptive array antenna with widely spaced antenna elements

Yoshinaga

Takeuchi²,

Akaiwa

1999

Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324

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Adaptive array antenna is receiving attention because it can suppress interference waves coming from other cells. In this paper, we investigate performance of adaptive array antenna with widely spaced antenna elements. We show that at a base station the adaptive array antenna with wide element spacing has better bit error rate performance due to space diversity effect than the one with narrow element spacing under co-channel interference and multi-path fading environment.

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“…When the base station is communicating only with the desired mobile station, hn= 0 in eq. (2). An example of the frame sbuchue of the FDD system with time-division multiplexing is shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

A feedback-type adaptive array antenna for two-frequency duplex communications

Funama

Takeuchi²,

Akaiwa³

The 13th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications

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Feedback type Adaptive Array Antenna (AAA) system with wide element space is analyzed on the down-link channel of a frequency-division duplexed (FDD) cellular system. The AAA is installed on a basestation so the downlink channel transfer functions are estimated and fedback on the up-link channel. The widely spaced AAA shows interference suppression as well as diversity effect against multi-path fading. We also propose a scheme to apply our AAA system to handoff mechanism. Moreover, we adopted an extrapolation technique for channel estimation. Computer simulation results showed that the AAA placed only at the base station can cope with co-channel interference and fading for the down-link when the fading speed is slow.

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Cochannel interference cancellation by base station adaptive array in uncorrelated Rayleigh fading channel

Cited by 4 publications

References 6 publications

Experiment and Simulation Results of Adaptive Antenna Array System at Base and Mobile Stations in Mobile Environment

Experiment and Simulation Results of Adaptive Antenna Array System at Base and Mobile Stations in Mobile Environment

Performance of adaptive array antenna with widely spaced antenna elements

A feedback-type adaptive array antenna for two-frequency duplex communications

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