A 22GS/s 5b adc in 0.13/spl mu/m SiGe BiCMOS

Schván, P.; Pollex, D.; Wang, Shing-Chi; Falt, C.; Ben-Hamida, Naim

doi:10.1109/isscc.2006.1696297

Cited by 20 publications

(8 citation statements)

References 5 publications

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“…In realizing waveform storage with such delays, analog implementations can be quite demanding [24], while digital ones have to deal with the practical limitations of current ADC technology, [25], [26]. Thus, it is meaningful to quantify the BER sensitivity of the proposed MSDD detectors to the quantization errors, when the ADC resolution is limited to a few bits per sample at a sampling rate around the Nyquist rate.…”

Section: E Ber Sensitivity To Adc Resolutionmentioning

confidence: 99%

“…Bearing in mind that the optimum path to each of the 2 L−1 states in each stage depends on the values of two different branch metrics (this means 2L additions either in floating-point for the VA-SMSDD or in integer format for the VA-HMSDD), as can be deduced from (26), the total number of additions required for a block size of length M is approximately S VA = LM · 2 L , i.e., exponentially in the memory length L, but only linearly in the data block size M . Like the VA-MSDD, the SD-MSDD also builds on additions only, but its computational complexity is a random variable depending on not only M but also the received signal [28], in that the latter affects the choice of the sphere radius performed at each iteration (refer to Section IV for details).…”

Section: F Computational Complexitymentioning

confidence: 99%

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Multiple symbol differential detection for UWB communications

Lottici

Tian

2008

IEEE Trans. Wireless Commun.

109

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Abstract-Multiple symbol differential detection (MSDD) offers high-performance symbol recovery and bypasses training or channel estimation, which are highly desired features in lowpower ultra-wideband (UWB) communications. However, UWB impulse radios entail distinct signaling structures and stringent performance-complexity requirements, giving rise to the need for a new MSDD scheme capable of coping with dense multipath UWB channels and detecting a large block of symbols at practical complexity. To this end, this paper develops a novel MSDD-based UWB receiver that attains the desired performance advantages by jointly detecting blocks of received symbols based on the autocorrelation principle. To enable practical implementations at desired performance versus complexity tradeoffs, new optimization formulations are introduced to derive fast implementation algorithms inspired by powerful signal processing tools including sphere decoding and Viterbi algorithm, in both softand hard-decision versions. Extensive simulations testify the realistic performance of the proposed detectors in the presence of multiple access interference, timing synchronization errors and low-resolution digital-to-analog conversion.

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Section: E Ber Sensitivity To Adc Resolutionmentioning

confidence: 99%

Section: F Computational Complexitymentioning

confidence: 99%

Multiple symbol differential detection for UWB communications

Lottici

Tian

2008

IEEE Trans. Wireless Commun.

109

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“…These issues can be overcome by digitization with little or no TI at all, but then the whole ADC is required to operate at full speed. SiGe bipolar technologies have a reputation for having a very high speed potential, and several IC designers have taken advantage of it to built ADCs without time interleaving beyond 10 GS/s Nyquist-rate [3]- [6]. However, the high speed operation has required multiple watts of power dissipation in the past.…”

Section: Introductionmentioning

confidence: 99%

A SiGe bipolar 6 bit 20 GS/s Nyquist-rate flash ADC without time interleaving

Ritter

Tual

Allard

et al. 2013

2013 IEEE Bipolar/BiCMOS Circuits and Technology Meeting (BCTM)

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An energy efficient plain SiGe bipolar 6 bit 20 GS/s Nyquist-rate flash analog-to-digital converter (ADC) without time interleaving and without track-and-hold is presented. A novel comparator placing concept along with a differential reference ladder is used to take advantage of differential signaling with a pseudo differential comparator architecture. A passive input signal distribution tree is employed to lower the power consumption and its limitations are discussed. The high speed capability of the comparator is studied and its bandwidth requirement is related to its linearity range. The ADC has a total power dissipation of 1 W and exhibits a dynamic linearity of 3.7 ENOB at 20 GS/s and 10 GHz signal frequency, without any calibration or correction. The conversion efficiency is FOM=3.9 pJ/cs.

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“…On the other hand, digital UWB receivers provide flexibility and benefit from CMOS technology scaling, but require an ADC sampling at Nyquist rate which is hardly realizable and highly power consuming, such as [7]. As the ADC power consumption of Flash ADCs, the standard solution for digital UWB architectures, scales linearly with the sampling rate and as a factor close to 4 with the bit width [8], several high speed 1-bit digital receiver architectures have been proposed, e.g.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of a flexible subsampling receiver for pulsed UWB signals

Vanderperren

Dehaene

Leus

2009

IEEE Trans. Wireless Commun.

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Abstract-This paper presents a flexible digital receiver for pulsed Ultra-Wideband (UWB) communications which is sampling below Nyquist rate. This receiver can trade demodulation performance for sampling rate, i.e. power consumption. The bit error rate for pulse amplitude and pulse position modulations is evaluated in AWGN and typical UWB channels. The performance of several types of equalizer is compared, taking into account their implementation complexity. A suboptimal but implementation efficient Minimum Mean-Square Error (MMSE) equalizer which reaches performances similar to the ideal MMSE equalizer is proposed. The impact of imperfect knowledge of the propagation channel and signal-to-noise ratio, due to the limited number of training symbols, on the performance of the receiver is assessed. Finally, the receiver architecture and implementation cost are discussed. The proposed subsampling receiver provides an attractive alternative to classical architectures based on correlation with a template.

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A 22GS/s 5b adc in 0.13/spl mu/m SiGe BiCMOS

Cited by 20 publications

References 5 publications

Multiple symbol differential detection for UWB communications

Multiple symbol differential detection for UWB communications

A SiGe bipolar 6 bit 20 GS/s Nyquist-rate flash ADC without time interleaving

Performance analysis of a flexible subsampling receiver for pulsed UWB signals

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