Hardware-assisted initialisation for constant modulus algorithm adaptive antenna

Boonpoonga, Akkarat; Sirisuk, P.; Chongcheawchamnan, M.; Patisang, S.; Krairiksh, M.

doi:10.1049/iet-map:20070130

Cited by 5 publications

(6 citation statements)

References 12 publications

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“…To confirm that the proposed architecture can operate in practical situation, simulation was conducted in case 2 in which the interference signal with an incident angle of 150° was added. Using the hardware-assisted initialization [14], the main beam of the antenna in both cases was switched to be 45°, thus improving the convergence property.…”

Section: Implementation and Resultsmentioning

confidence: 99%

“…The structure for implementing a CMA processing unit can be realized using the MAC operation [9][10][11][12][13][14]. Although this operation is very efficient in terms of hardware utilization, the operation has a main limitation in terms of high-speed operation owing to its recursive nature.…”

Section: Delayed Cma For Adaptive Phased Array Antennamentioning

confidence: 99%

“…Alternatively, a field programmable gate array (FPGA) can be employed for adaptive antenna implementation [9][10]. In addition, the FPGA implementation of the CMA adaptive antenna with hardware-assisted initialization has been recently proposed in [14]. Nonetheless, only marginal improvement on the operating frequency is obtained from the techniques.…”

Section: Introductionmentioning

confidence: 99%

“…Nonetheless, only marginal improvement on the operating frequency is obtained from the techniques. This is because the techniques presented in [9,10,14] are based upon a multiply-accumulate (MAC) operation, which is similar to the operation of the general-purpose DSP. To overcome the slow operating clock speed, parallel processing with pipelining can be employed [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

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Efficient parallel architecture for implementation of the CMA adaptive antenna

Boonpoonga¹,

Sirisuk²,

Krairiksh³

2013

IETE Tech Rev

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This paper presents an efficient parallel architecture for implementation of a constant modulus algorithm (CMA) adaptive array antenna. By inserting delay units into the original CMA, a novel delayed CMA (DCMA) that can significantly reduce the associated critical path is derived. Consequently, a pipelining architecture that supports parallel processing is introduced for implementation of the DCMA. In addition to the pipelining technique, a power-of-two multiplier is proposed for the DCMA leading to the efficient FPGA implementation. The effects of delays and finite word-length on the convergence property of CMA are investigated via simulations. Moreover, the synthesized results demonstrate that FPGA implementation of the proposed architecture using power-of-two arithmetic achieves 26.9% resource reduction in comparison with that of fixed-point arithmetic and operating clock frequency higher than 65 MHz. The implemented FPGA was tested to confirm that the designed architecture operates well for CMA.

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Section: Implementation and Resultsmentioning

confidence: 99%

Section: Delayed Cma For Adaptive Phased Array Antennamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Efficient parallel architecture for implementation of the CMA adaptive antenna

Boonpoonga¹,

Sirisuk²,

Krairiksh³

2013

IETE Tech Rev

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“…To form a circular array as PASE, study on mutual coupling was conducted for appropriate feeding design as illustrated in [8]. Since phased array was successfully applied for initialization of constant modulus algorithm (CMA) for fast convergence [9], PASE was proposed for further improving convergence of such system [10]. Recently, PASE was proposed for angle of arrival (AOA) measurement [11] and dual band PASE was introduced for dual band operation [12].…”

Section: Introductionmentioning

confidence: 99%

Phased array of switched-beam elements and its applications

Krairiksh

2009

2009 Applied Electromagnetics Conference (AEMC)

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Stabilised blind interference suppression of constant modulus‐based adaptive array over Rayleigh fading channels by initial antenna selection

Maruta¹,

Ahn²

2019

IET Microwaves, Antennas & Propagation

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This article proposes an initial antenna selection for constant modulus‐based blind interference suppression algorithms to stabilise their prominent interference suppression performance. Constant modulus algorithm (CMA) is a well‐known blind adaptive array scheme, but it cannot suppress the interference when signal‐to‐interference power ratio (SIR) is <0 dB. It faces strong limits on their applicable region over Rayleigh fading channels where instantaneous channel gain fluctuates over 10 dB range. Even if the expected desired signal strength is larger than interference, CMA may still miscapture the interference and incorrectly suppress the desired signal. The authors’ proposal is simplified approach to select the antenna element whose reception power is maximal. Certain antenna element can be expected to capture the desired signal precisely under the condition where SIR is statistically positive, so that the CMA processor can utilise it as an initial input. This condition will be ensured by increasing antenna element number, supported by the trends that base station antenna elements are going massive. Computer simulations verifies improved interference suppression performance provided by the proposed scheme. This article also verified applicability for multi‐modulus algorithm to accommodate M‐ary quadrature amplitude modulation (QAM) use.

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Hardware-assisted initialisation for constant modulus algorithm adaptive antenna

Cited by 5 publications

References 12 publications

Efficient parallel architecture for implementation of the CMA adaptive antenna

Efficient parallel architecture for implementation of the CMA adaptive antenna

Phased array of switched-beam elements and its applications

Stabilised blind interference suppression of constant modulus‐based adaptive array over Rayleigh fading channels by initial antenna selection

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