Frequency planning and synthesizer architectures for multiband OFDM UWB radios

Mishra, C.; Valdes‐Garcia, Alberto; Bahmani, F.; Batra, A.; Sánchez-Sinencio, E.; Silva-Martí­nez, J.

doi:10.1109/tmtt.2005.856087

Cited by 51 publications

(45 citation statements)

References 11 publications

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“…However, the required frequency synthesizer can suffer from high complexity, as it needs to fulfill the constraints necessary to avoid interference between the users. Based on the example of the MB-OFDM (multi-band OFDM) standard [12] with very strict constraints, we have studied and developed an agile frequency synthesizer, able to switch between 14 frequency bands between 3.432 and 10.296 GHz [13]. It requires only one phase locked loop (PLL); the frequencies are generated by consecutive mixing and selection between different outputs of the PLL.…”

Section: Optimized Multi-band Synthesizer For Green Radiomentioning

confidence: 99%

Green radio despite "Dirty RF" front-end

Ariaudo

Fijalkow

Gautier

et al. 2012

J Wireless Com Network

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In this article, we show that the non-ideal Radio-Frequency (RF) front-ends have to be corrected in order to contribute in a Green radio development. In fact, the effects of typical RF imperfections, like nonlinearities, carrier frequency offsets, and IQ imbalances, can be compensated for, when digital correction algorithms are applied. Such algorithms enable Green applications (e.g., Orthogonal Frequency Division Multiple Access for the uplink) despite a restrictive RF imperfection, or allow a less constrained hardware design, which reduces the chip area and the number of components (Green design) or facilitate the reduction of spectral pollution and of power consumption (Green transmission). So, we propose to implement these correction methods to compensate for the damaging effects of RF imperfections in mind of a Green issue.

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Section: Optimized Multi-band Synthesizer For Green Radiomentioning

confidence: 99%

Green radio despite "Dirty RF" front-end

Ariaudo

Fijalkow

Gautier

et al. 2012

J Wireless Com Network

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“…An alternative frequency plan is shown in Fig. 1(b) (Mishra et al, 2005). (Batra et al, 2004a;Mishra et al, 2005) Designing frequency synthesizers for UWB MB-OFDM alliance applications faces particularly stringent challenges and performance criteria.…”

Section: Introductionmentioning

confidence: 99%

“…1(b) (Mishra et al, 2005). (Batra et al, 2004a;Mishra et al, 2005) Designing frequency synthesizers for UWB MB-OFDM alliance applications faces particularly stringent challenges and performance criteria. Amongst these one may list the wide range of frequencies to be synthesized, the in-group frequency hopping time (less than 9.5 ns), the reduction of the silicon area and the power consumption in the implementation and the limitation of the integrated spurious tone level in the different bands (less than -32 dBc in a 528 MHz bandwidth).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Frequency Synthesizer Architectures for UWB MB-OFDM Alliance Application

Casha¹,

Grech²

2011

Ultra Wideband Communications: Novel Trends - System, Architecture and Implementation

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“…All other specified frequencies are synthesized by repeatedly dividing and mixing the fundamental frequency. Therefore, this wideband frequency synthesizer requires complex and precise frequency planning [15]. Additionally, it requires complex filter banks for removing spurious and image signals are created in complex signal mixing.…”

mentioning

confidence: 99%

Enhancement of Frequency Synthesizer Operating Range Using a Novel Frequency-Offset Technique for LTE-A and CR Applications

Peng

Lee

Chen

et al. 2013

IEEE Trans. Microwave Theory Techn.

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Abstract-This paper presents a novel frequency-offset technique to enhance operating range of frequency synthesizers for long-term evolution-advanced and cognitive-radio applications. Conventional wideband frequency synthesizers typically have complex architectures, such as multiple phase-locked loops (PLLs), multiple voltage-controlled oscillators, and multiple mixers, to increase operating range. These complex architectures have high cost and power consumption. In this study, the proposed technique substantially increases the operating range of the frequency synthesizer by using only a single PLL to simultaneously lock two mixing oscillators. The presented frequency synthesizer is implemented using 0.18-m CMOS technology. Performance tests demonstrate that the frequency synthesizer achieves a very wide operating frequency range from 50 MHz to 4.8 GHz with a phase noise lower than 100 dBc/Hz at a frequency offset of 100 kHz. The period of stability for a switching frequency of 40 MHz is shorter than 40 s. Index Terms-Cognitive radio (CR), long-term evolution-advanced (LTE-A), phase-locked loop (PLL), wideband frequency synthesizer, wideband voltage-controlled oscillator (VCO).

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Frequency planning and synthesizer architectures for multiband OFDM UWB radios

Cited by 51 publications

References 11 publications

Green radio despite "Dirty RF" front-end

Green radio despite "Dirty RF" front-end

Frequency Synthesizer Architectures for UWB MB-OFDM Alliance Application

Enhancement of Frequency Synthesizer Operating Range Using a Novel Frequency-Offset Technique for LTE-A and CR Applications

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