A 65 GHz LNA/Phase Shifter With 4.3 dB NF Using 45 nm CMOS SOI

Uzunkol, Mehmet; Rebeiz, Gabriel M.

doi:10.1109/lmwc.2012.2218651

Cited by 23 publications

(11 citation statements)

References 9 publications

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“…The power consumed by the phase shifters depend on the type and on the resolution of the quantized phases. In [22], an LNA/3-bit phase shifter front-end for 60 GHz applications is presented and compared to other LNAfPhase shifters. Power consumptions for one element of previously designed phased arrays are summarized in this work, taking the values 15, 45, 60 and 78 mW for 3, 4, 5 and 4-bit phase shifters respectively (note that power consumption of the LNA is also included here).…”

Section: Power Consumption Modelmentioning

confidence: 99%

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Channel estimation and hybrid combining for mmWave: Phase shifters or switches?

Méndez-Rial

Rusu

Alkhateeb

et al. 2015

2015 Information Theory and Applications Workshop (ITA)

195

172

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Precodinglcombining and large antenna arra y s are essential in millimeter wave (mmWave) s y stems. In traditional MIMO s y stems, precodinglcombining is usuall y done digitall y at baseband with one radio frequenc y (RF) chain and one analog-to-digital converter (ADC) per antenna. The high cost and power consumption of RF chains and ADCs at mmWave frequencies make an all-digital processing approach prohibitive.When onl y a limited number of RF chains is available, h y brid architectures that split the precodinglcombining processing into the analog and digital domains are attractive. A previousl y proposed h y brid solution emplo y s phase shifters and mixers in the RF precodinglcombining stage. It obtains near optimal spectral efficiencies with a reduced number of RF channels. In this paper we propose a different h y brid architecture, which simplifies the hardware at the receiver b y replacing the phase shifters with switches. We present a new approach for compressed sensing based channel estimation for the h y brid architectures.Given the channel estimate, we propose a novel algorihtm that jointl y designs the antenna subsets selected and the baseband combining. Using power consumption calculations and achievable rates, we compare the performance of h y brid combining with antenna switching and phase shifting, showing that antenna selection is preferred in a range of operating conditions. I. INT RODUCTIONCommunication over millimeter wave (lmnWave) frequen cies [1] is the frontier for commercial wireless communication systems. Initial applications of mmWave to personal area networks (PAN) and local area networks (LAN) through the 60GHz unlicensed band are already standardized [2] and commercially available. The large bandwidths available at mmWave carrier frequencies also makes it interesting for 5G cellular systems [3], [4], [5], [6].MmWave communication requires very large multiple-input multiple-output (MIMO) systems to provide sufficient antenna aperture. Unfortunately, at mmWave there are additional hard ware constraints that have to imposed due to the practical limitations on the cost, complexity and power consumption with the current technology [7]. Due to mixed signal and baseband processing requirements, it may not be feasible to use one complete RF chain and one DAC or ADC per antenna, so precoding and combining can not be done entirely in the baseband. For this reason, systems like IEEE 802.11ad use analog beamforming / combining and only support single stream MIMO communication.of streams requires the use of precoding and combining, mak ing functions like low complexity and low overhead channel estimation more essential.In previous work, a hybrid architecture that accounts for hardware constraints has been proposed [8], [9], resulting in precoder/combiner design algorithms that divide the op timization process into the RF and the baseband stages, and channel estimation methods that exploit the sparse nature of the mmWave channel. This architecture is based on quantized phase shifters, as illustrate...

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Section: Power Consumption Modelmentioning

confidence: 99%

“…and(22) can be seen as a single measurement vector (SMV) compressive sensing model. The reconstruction of the channel is fonnulated as a non-convex combinatorial problem min Il xllo subject to Ily -Ax l1 2 :s; a,…”

mentioning

confidence: 99%

Channel estimation and hybrid combining for mmWave: Phase shifters or switches?

Méndez-Rial

Rusu

Alkhateeb

et al. 2015

2015 Information Theory and Applications Workshop (ITA)

195

172

View full text Add to dashboard Cite

show abstract

“…3 . In [4]- [6], from the limitations of passive PSs and the conventional VSPS, the overall gain of the LNA-PS is degraded by the lossy PS while consuming a large amount of dc power. In [7], using a combination of a Wilkinson power divider, a phase selection stage, and a buffer amplifier, another VSPS is proposed.…”

Section: Measurements Resultsmentioning

confidence: 99%

A Low Power LNA-Phase Shifter With Vector Sum Method for 60 GHz Beamforming Receiver

Song

Lee

Yoon

et al. 2015

IEEE Microw. Wireless Compon. Lett.

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Taking into consideration the limitations of the conventional vector sum phase shifter (VSPS), a low power LNA-PS is proposed for a 60 GHz beamforming receiver using a 65 nm CMOS process. By developing a low loss 90 PS that integrates the HPF into the LPF with a low loss SPST switch and a power efficient vector adder using a current reuse structure, the proposed LNA-PS shows the gain of 24 dB, the highest among the LNA-PSs developed to date, with very small power consumption of 16 mW. The total size including the pads is only 1.3 .Index Terms-Beamforming, CMOS, LNA, phase shifter, 60 GHz.As the number of transistors ( ) increases, the output current decreases, leading to poor combining efficiency.Given that fewer combining paths can guarantee better power combining efficiency, we propose another type of VSPS that

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“…• RF chain is the power consumed by the RF chain, which includes a local oscillator, a mixer, a base band amplifier and a low pass filter. The authors in [74] considered values of 14mW and 5mW for low pass filter and base band amplifier, respectively. An oscillator phase noise is inversely proportional to the power consumption.…”

Section: Model Of Power Consumptionmentioning

confidence: 99%