Direct Baseband I-Q Regeneration Method for Five-Port Receivers Improving DC-Offset and Second-Order Intermodulation Distortion Rejection

Morena-Alvarez-Palencia, Cristina de la; Mabrouk, Kais; Huyart, B.; Mbaye, Amadou; Burgos-García, M.

doi:10.1109/tmtt.2012.2199512

Cited by 13 publications

(23 citation statements)

References 18 publications

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“…The software, implemented in Matlab, is applied in a personal computer to regenerate the I-Q components of the original signal. For the six-port receiver calibration, it has been used the conventional six-port auto-calibration method based on training sequence described in [12][13][14][15][16][17][18][19]. The quality of the demodulated signal will be measured in terms of the EVM (Error Vector Magnitude).…”

Section: Measurement Resultsmentioning

confidence: 99%

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Experimental Performance Comparison of Six-Port and Conventional Zero-if/Low-if Receivers for Software Defined Radio

Morena¹,

Burgos-García²

2012

PIER B

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Abstract-This paper presents an experimental performance comparison among three RF architectures that are very suitable for Software Defined Radio (SDR) implementation: zero-IF, low-IF, and six-port network. A six-port receiver and a dual zero-IF/low-IF receiver have been developed for this purpose. Six-port receiver is a very promising and flexible RF architecture for the low-cost implementation of integrated microwave and millimeter-wave systems. Competitive advantages such as ultra-broadband behavior, low-cost, reconfigurability, and low power consumption, point to the six-port architecture as a good candidate to implement a SDR. However, two issues on broadband six-port receivers require intensive research: dynamic range extension, and miniaturization. In this paper, two solutions are proposed to solve these problems: the use of biased detector diodes for dynamic range extension, and the use of low temperature co-fired ceramic (LTCC) technology for six-port reduction. The measurement results indicate that the six-port receiver shows high potential benefits and advantages compared to conventional zero-IF and low-IF receivers. In addition, the capability of the six-port architecture to operate as both zero-IF and low-IF receivers has been experimentally demonstrated for the first time.

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Section: Measurement Resultsmentioning

confidence: 99%

“…The original I-Q components can be regenerated from these four power observations and some calibration constants, depending on system response. It is also possible to recover the original signal from three power measurements, leading to a five-port receiver [12,13].…”

Section: Overview Of Rf Architectures For Sdrmentioning

confidence: 99%

Experimental Performance Comparison of Six-Port and Conventional Zero-if/Low-if Receivers for Software Defined Radio

Morena¹,

Burgos-García²

2012

PIER B

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“…On the other hand, the downside of this lies in the use of 4 ADCs at the outputs of the system. However, in direct-conversion receiver applications, the number of ADCs can be reduced to 3 by using the so-called five-port technique [21][22][23][24][25][26]. In this particular case, the power level of the local oscillator (LO) is supposed to be constant or prone to very small variations, which accordingly permits the suppression of one ADC.…”

Section: Introductionmentioning

confidence: 99%

“…In this particular case, the power level of the local oscillator (LO) is supposed to be constant or prone to very small variations, which accordingly permits the suppression of one ADC. In order to further reduce the number of ADCs to only 2 likewise conventional / architectures, the 3 outputs of the five-port circuit have to be designed so that one of them is an amplitude and phase symmetry axis in relation to the two others [26][27][28]. When these two conditions are fulfilled, a single analog OP-amp circuit can be connected to the 3 outputs of the five-port to perform basic operations (sum and difference) between them, resulting in two 90 ∘ quadrature and output components of the demodulated RF signal.…”

Section: Introductionmentioning

confidence: 99%

“…When these two conditions are fulfilled, a single analog OP-amp circuit can be connected to the 3 outputs of the five-port to perform basic operations (sum and difference) between them, resulting in two 90 ∘ quadrature and output components of the demodulated RF signal. For this reason, we call this analog OP-amp circuit a baseband / regeneration circuit [26]. Other valuable benefits of the use of this circuit are DC offsets suppression and 2nd order intermodulation distortion (IMD2) cancellation, which are serious issues in direct-conversion receivers [29].…”

Section: Introductionmentioning

confidence: 99%

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Performance of 2–3.6 GHz Five-Port/Three-Phase Demodulators with Baseband AnalogI/QRegeneration Circuit in Direct-Conversion Receivers

Kaissoine

Khy

Mabrouk

et al. 2014

Journal of Electrical and Computer Engineering

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A comparison between performance of a five-port demodulator (FPD) and a three-phase demodulator (TPD) with both architectures connected to a so-called basebandI/Qregeneration circuit is carried out. In order to compare these two receivers to a classical architecture, the performance of anI/Qdemodulator (IQD) is also presented. Measured results show the superiority of TPD and IQD over FPD in terms of residual DC offsets and 2nd order intermodulation distortion (IMD2) products, noise figure (NF), and sensitivity due to the use of active balanced mixers instead of diode power detectors. Lastly, demodulation of three noncontiguous RF carriers shows the stronger potential of the three-phase demodulator (TPD) for applications in future long term evolution-advanced (LTE-A) receivers through EVM and constellation diagram measurements.

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New three‐phase demodulator circuit operating in a wide frequency range

Kaissoine

Huyart

2015

Micro & Optical Tech Letters

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This article describes a new design of a Three‐Phased Demodulator circuit (TPD) using microstrip technology on FR4 dielectric substrate. The results of frequency transposition to baseband of three aggregated radio frequency signals position TPD as a potential candidate for future LTE‐A mobile communication networks. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:1825–1831, 2015

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Direct Baseband I-Q Regeneration Method for Five-Port Receivers Improving DC-Offset and Second-Order Intermodulation Distortion Rejection

Cited by 13 publications

References 18 publications

Experimental Performance Comparison of Six-Port and Conventional Zero-if/Low-if Receivers for Software Defined Radio

Experimental Performance Comparison of Six-Port and Conventional Zero-if/Low-if Receivers for Software Defined Radio

Performance of 2–3.6 GHz Five-Port/Three-Phase Demodulators with Baseband AnalogI/QRegeneration Circuit in Direct-Conversion Receivers

New three‐phase demodulator circuit operating in a wide frequency range

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