RF Band-Pass Sampling Frontend for Multiband Access CR/SDR Receiver

Kim, HyungJung

doi:10.4218/etrij.10.1409.0073

Cited by 13 publications

(3 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…One of candidates for implementing high‐efficiency transmitter is Class‐S amplifier [1]. Bandpass delta‐sigma modulator (BPDSM) is crucial for converting nonconstant envelope signal to two‐level digital signal in Class‐S concept [2, 3]. The architecture of fourth‐order LC BPDSM is shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

A switch controlled dual‐band band pass ΔΣ modulator

Park

Jang

Jung

2012

Micro & Optical Tech Letters

View full text Add to dashboard Cite

A switch controlled fourth‐order dual‐band bandpass delta‐sigma modulator (BPDSM) is proposed. It consists of two stage second‐order resonator, high‐speed comparator, multifeedback current digital‐to‐analog converter, and clock distributer. The band selection is controlled by capacitor bank, and fine frequency tuning is done by varactor. The implemented BPDSM shows a peak signal‐to‐noise‐ratio is 41.6 dB, 42.5 dB, an error vector magnitude is 3.06%, 2.4% in 882 MHz, 955 MHz, respectively, and a differential output voltage swing is 1.32Vp‐p with dc power consumption of 389 mW. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2784–2787, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27207

show abstract

Section: Introductionmentioning

confidence: 99%

A switch controlled dual‐band band pass ΔΣ modulator

Park

Jang

Jung

2012

Micro & Optical Tech Letters

View full text Add to dashboard Cite

show abstract

“…Analytical methods exist that permit minimum bandpass sampling frequencies to be computed in the case of a single-band spectrum [1][2][3]. However, BPS has its issues for multiband signal spectrum due to certain constraints like aliasing, spectral folding, and reconstruction of information band [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Direct radio frequency sampling methodology for multiple signals in an energy-sparse spectrum

Ahmed¹,

Khan²

2016

Turk J Elec Eng & Comp Sci

View full text Add to dashboard Cite

Abstract:In software defined radio (SDR) systems, it is desirable to down-convert multiple RF signals simultaneously by placing an analogue-to-digital converter (ADC) as near the antenna as possible. Radio frequency (RF) subsampling is one of the established methodologies used by radio receivers to directly down-convert and digitize RF signals. In this paper, we propose a novel direct RF sampling method to find out the minimum sampling frequency for an evenly spaced spectrum comprising multiband RF signals. However, it can also be applied to nonuniformly spaced signals with slight modification. The proposed methodology describes a set of rules to achieve the lowest possible sampling frequency rates without the compromise of spectrum folding or overlapping of aliases in the baseband after down-conversion. Moreover, the proposed formula is general, and flexible to the number of input signals or bands and to their positions in the desired spectrum. Simulations verify that by using the offered minimum sampling rates, the desired signal is extracted without the mentioned constraints.

show abstract

“…One of candidates for implementing high efficiency transmitter is Class-S amplifier [2]. Pulsewidth modulator (PWM) and Delta-sigma modulator (DSM) are crucial for converting non-constant envelope signal to bi-level digital signal in Class-S concept [3,4,5].…”

Section: Introductionmentioning

confidence: 99%

A fully integrated pulse width modulator for Class-S power amplifiers

Park

Jung

Lee

2013

IEICE Electron. Express

View full text Add to dashboard Cite

A fully integrated pulsewidth modulator for Class-S power amplifiers is presented. It consists of a triangular signal generator, a comparator and output buffer. The HBT BiCMOS design of PWM circuit is applied to the LTE frequency range, which converts digitally modulated 955 MHz RF carrier with 2.87 GHz sampling clock. This PWM shows an EVM 6.6%, a differential output voltage swing 1.35 Vp-p with 62.7 mA dissipating at 3.3 V power supply.

show abstract

RF Band-Pass Sampling Frontend for Multiband Access CR/SDR Receiver

Cited by 13 publications

References 11 publications

A switch controlled dual‐band band pass ΔΣ modulator

A switch controlled dual‐band band pass ΔΣ modulator

Direct radio frequency sampling methodology for multiple signals in an energy-sparse spectrum

A fully integrated pulse width modulator for Class-S power amplifiers

Contact Info

Product

Resources

About