Smart Antennas Based on Spatial Multiplexing of Local Elements (SMILE) for Mutual Coupling Reduction

Fredrick, J.D.; Wang, Yuanxun; Itoh, T.

doi:10.1109/tap.2003.818798

Cited by 47 publications

(13 citation statements)

References 10 publications

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“…As discussed in [2],the output signal-to-noise ratio (SNR) using this switch antenna architecture is essentially equal to the conventional multichannel channel scheme. However, the optical devices introduce insertion losses and additional noise which can degrade the noise figure of the system and the output SNR.…”

Section: B Single Rf Channel With the Signal Bandwidth And Snrmentioning

confidence: 99%

“…One approach, named spatially multiplexing of local elements (SMILE) [2], uses the microwave switches to select N antenna elements sequentially through a time-division multiplexing structure. The drawback is that the received element outputs of the array are not from the same time, therefore it will have some problems when this approach is used for motion targets detection.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A novel single RF channel scheme for smart antenna based on optical delay lines

Cui

Zhang

et al. 2014

Microwave Photonics (MWP) and the 2014 9th Asia-Pacific Microwave Photonics Conference (APMP) 2014 International Topical Meetin

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A novel time division multiplexing of channel (TDMC) scheme for smart antenna is proposed. The scheme effectively reduces the number of radio frequency (RF) channels form N to one. In this scheme, each element is followed by an optical delay line with different time delays. The signals on different elements can pass through the only RF channel sequentially. Compared with other schemes, the TDMC can be used not only for the receiving but also for the transmitting. Design principles and correction method for recovery data with errors are given. Simulation results have validated the proposed scheme.

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Section: B Single Rf Channel With the Signal Bandwidth And Snrmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A novel single RF channel scheme for smart antenna based on optical delay lines

Cui

Zhang

et al. 2014

Microwave Photonics (MWP) and the 2014 9th Asia-Pacific Microwave Photonics Conference (APMP) 2014 International Topical Meetin

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“…Hence, practically for the large antenna arrays the edge effects can be ignored. Fredrick [9] shows that proper design of the feed network may reduce induced surface currents significantly, yielding nearly ideal radiation characteristics. As mentioned in [7], [9], for the narrowband applications and appropriate compensation of the induced surface currents MCM can be estimated off-line.…”

Section: Mutual Coupling Compensationmentioning

confidence: 99%

Fast mutual coupling compensation algorithm for large adaptive antenna array

Zaharov

Lobaina

Rodriguez

et al. 2009

2009 52nd IEEE International Midwest Symposium on Circuits and Systems

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The mutual coupling between antenna array elements degrades the performance of spatial processing algorithm, such as signal-to-interference-plus-noise ratio (SINR) in output of antenna array, antenna gain, and so on. If the mutual coupling matrix (MCM) is known, mutual coupling effect can be mitigated by pre-multiplying the input signal by the inverse of the coupling matrix (assuming that it is invertible). Unfortunately, it requires intensive computational work with the cost of O(N 2 ), where N is a number of antenna elements, especially for large antenna array applications. Taking into account that MCM has the Toeplitz structure, we propose to mitigate the mutual coupling with the cost of O(M logM ) by using fast algorithm that involve circular convolution, where 2N ≤ M < 4N and M is a number of power two. The performance of large adaptive antenna array in the presence of mutual coupling as well as after decoupling is discussed.

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“…The traditional way to obtain such snapshots is to connect each array element to an independent radio frequency (RF) receiver. Therefore, the number of receivers must be equal to the number of antenna elements, which usually causes the overall system to be complicated, bulky, and costly [11]. This problem becomes more serious in the case of large-scale arrays.…”

Section: Introductionmentioning

confidence: 99%

Array signal recovery algorithm for a single-RF-channel DBF array

Zhang

2016

EURASIP J. Adv. Signal Process.

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An array signal recovery algorithm based on sparse signal reconstruction theory is proposed for a single-RF-channel digital beamforming (DBF) array. A single-RF-channel antenna array is a low-cost antenna array in which signals are obtained from all antenna elements by only one microwave digital receiver. The spatially parallel array signals are converted into time-sequence signals, which are then sampled by the system. The proposed algorithm uses these time-sequence samples to recover the original parallel array signals by exploiting the second-order sparse structure of the array signals. Additionally, an optimization method based on the artificial bee colony (ABC) algorithm is proposed to improve the reconstruction performance. Using the proposed algorithm, the motion compensation problem for the single-RF-channel DBF array can be solved effectively, and the angle and Doppler information for the target can be simultaneously estimated. The effectiveness of the proposed algorithms is demonstrated by the results of numerical simulations.

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Smart Antennas Based on Spatial Multiplexing of Local Elements (SMILE) for Mutual Coupling Reduction

Cited by 47 publications

References 10 publications

A novel single RF channel scheme for smart antenna based on optical delay lines

A novel single RF channel scheme for smart antenna based on optical delay lines

Fast mutual coupling compensation algorithm for large adaptive antenna array

Array signal recovery algorithm for a single-RF-channel DBF array

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