A Configurable Transmitter Architecture for IEEE 802.11ac and 802.11ad Standards

Gebreyohannes, Fikre Tsigabu; Frappé, Antoine

doi:10.1109/tcsii.2015.2468920

Cited by 16 publications

(21 citation statements)

References 11 publications

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“…Figure 6.1 shows the block diagram of a digital IQ transmitter featuring a DRFC. The IQ modulator is followed by a Σ∆ noise-shaper and a direct digital-to-RF converter (DRFC) [ [119,41,46]. The choice of architecture, however, depends on the trade-off between in-band resolution and out-of-band emission [92].…”

Section: Digital Iq Transmitter Architecturementioning

confidence: 99%

“…The choice of architecture, however, depends on the trade-off between in-band resolution and out-of-band emission [92]. A Σ∆ modulator followed by a semi-digital FIR filter as a DRFC is beneficial in WLAN applications where a high in-band resolution digital-to-analog conversion that meets the out-of-band spectrum emission mask can be efficiently implemented [46]. In this work, a novel semi-digital RF DAC implementation is presented.…”

Section: Digital Iq Transmitter Architecturementioning

confidence: 99%

“…Semi-digital FIR filters or sometimes called analog FIR filters, are used as frequency selective filters as well as converting from digital domain to analog domain since it uses analog multipliers as filter taps. The analog multipliers are implemented by means of current sources, in conventional SDFIR filters, if the output of the Σ∆ modulator quantizer is a single bit [116,122,18,34,87,105,124,46,109]. In fact each tap is one-bit DAC and they are weighted according to the filter coefficients.…”

Section: Semi-digital Fir Filtermentioning

confidence: 99%

“…6.2. Quantization error introduced by the limited coefficient precision will alter the FIR filter frequency response [116,18,87,124,46]. Secondly the SDFIR, in contrary to digital FIR, will have mismatch between the multipliers and this inaccuracy in FIR filter coefficients imposes a higher bound on achievable attenuation by the SDFIR filter [94,93].…”

Section: Fir Filter Coefficients Precisionmentioning

confidence: 99%

“…5.1, to an interpolating stage, digital Σ∆ modulator and a semi-digital finite-impulse response (FIR) filter. Semi-digital FIR digital-to-analog converters (SDFIR DAC), used as filters and data converters, are implemented as switched-capacitor network or in current-steering architectures, and reported previously in [116,122,18,34,87,105,124,48,47,46]. In this configuration, N -bit baseband data is up-sampled and filtered through the interpolator and then applied to the digital Σ∆ modulator.…”

Section: Introductionmentioning

confidence: 99%

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Studies on Selected Topics in Radio Frequency Digital-to-Analog Converters

Sadeghifar

2019

Linköping Studies in Science and Technology. Dissertations

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The network latency in fifth generation mobile technology (5G) will be around one millisecond which is much lower than in 4G technology. This significantly faster response time together with higher information capacity and ultra-reliable communication in 5G technology will pave the way for future innovations in a smart and connected society. This new 5G network should be built on a reasonable wireless infrastructure and 5G radio base stations that can be vastly deployed. That is, while the electrical specification of a radio base station in 5G should be met in order to have the network functioning, the size, weight and power consumption of the radio system should be optimized to be able to commercially deploy these radios in a huge network. Last but not least I would like to especially thank my soulmate and my love Hoda. Without all your help, your devotion and patience, I would not be able to complete this work. Therefore, I dedicate this work to you.

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Section: Digital Iq Transmitter Architecturementioning

confidence: 99%

Section: Digital Iq Transmitter Architecturementioning

confidence: 99%

Section: Semi-digital Fir Filtermentioning

confidence: 99%

Section: Fir Filter Coefficients Precisionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Studies on Selected Topics in Radio Frequency Digital-to-Analog Converters

Sadeghifar

2019

Linköping Studies in Science and Technology. Dissertations

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Optimization problem formulation for semi-digital FIR digital-to-analog converter considering coefficients precision and analog metrics

Sadeghifar

Gustafsson

Wikner

2018

Analog Integr Circ Sig Process

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Optimization problem formulation for semi-digital FIR digital-to-analog converter (SDFIR DAC) is investigated in this work. Magnitude and energy metrics with variable coefficient precision are defined for cascaded digital RD modulators, semi-digital FIR filter, and Sinc roll-off frequency response of the DAC. A set of analog metrics as hardware cost is also defined to be included in SDFIR DAC optimization problem formulation. It is shown in this work, that hardware cost of the SDFIR DAC, can be significantly reduced by introducing flexible coefficient precision while the SDFIR DAC is not over designed either. Different use-cases are selected to demonstrate the optimization problem formulations. A combination of magnitude metric, energy metric, coefficient precision and analog metrics are used in different use cases of optimization problem formulation and solved to find out the optimum set of analog FIR taps. A new method with introducing the variable coefficient precision in optimization procedure was proposed to avoid non-convex optimization problems. It was shown that up to 22% in the total number of unit elements of the SDFIR filter can be saved when targeting the analog metric as the optimization objective subject to magnitude constraint in pass-band and stop-band.

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Network selection in heterogeneous wireless networks using multi-criteria decision-making algorithms: a review

Obayiuwana

Falowo

2016

Wireless Netw

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A Configurable Transmitter Architecture for IEEE 802.11ac and 802.11ad Standards

Cited by 16 publications

References 11 publications

Studies on Selected Topics in Radio Frequency Digital-to-Analog Converters

Studies on Selected Topics in Radio Frequency Digital-to-Analog Converters

Optimization problem formulation for semi-digital FIR digital-to-analog converter considering coefficients precision and analog metrics

Network selection in heterogeneous wireless networks using multi-criteria decision-making algorithms: a review

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