scholarly journals CMOS Low Noise Amplifiers for Wireless Body Area Networks Applications: Techniques and Designs

2021 ◽  
Author(s):  
Mohammad Rezvani
Keyword(s):  
Low Power ◽  
Negative Feedback ◽  
Communication Systems ◽  
Noise Figure ◽  
Impedance Matching ◽  
Body Area Networks ◽  
Wireless Body Area Networks ◽  
Low Noise ◽  
Body Area ◽  
Wide Range

Recently, the growing advances in communication systems has led to urgent demand for low power, low cost, and highly integrated circuit topologies for transceiver designs, as key components of nearly every wireless application. Regarding to the usually weak input signal of such systems, the primary purpose of the wireless transceivers is consequently amplifying the signal without adding additional noise as much as possible. As a result, the performance of the low noise amplifier (LNA), measured in terms of features like gain, noise figure, dynamic range, return loss and stability, can highly determine the system’s achievement. Along with the evolution in wireless technologies, people get closer to the global seamless communication, which means people can unlimitedly communicates with each other under any circumstances. This achievement, as a result, paves the way for realizing wireless body area network (WBAN), the required applications for wireless sensor network, healthcare technology, and continuous health monitoring. This thesis suggests a number of LNA designs that can meet a wide range of requirements viz gain, noise figure, impedance matching, and power dissipation at 2.4Ghz frequency based on 0.13μm and 65nm CMOS technologies. This dissertation focused on the low power, high gain, CMOS reused current (CICR) LNA with noise optimization for on-body wireless body area networks (WBAN). A new design methodology is introduced for optimization of the LNA to attain gain and noise match concurrently. The designed LNA achieves a 28.5 dB gain, 2.4 dB noise figure, -18 dB impedance matching, while dissipating 1mW from a 1.2V power supply at 2.4 GHz frequency which is intended for WBAN applications. The tests and simulations of LNA are utilized in Cadence IC6.15 with IBM 130nm CMRF-8-SF library. The provided CICR LNA results inclusively prove the advantages of our design over other recorded structures. In the second step, a new linearization method is proposed based on Cascade LNA structure (CC-LNA). The proposed negative feedback intermodulation sink (NF-IMS) method benefits from the feedback to improve the linearity of CC-LNA. It proves that the additional negative feedback enhances the linearity of LNA despite the previous research. Furthermore, the heavily mathematical calculations of NF-IMS technique are carried on with the proposed modified Volterra series method. The NF-IMS method demonstrates more than 9.5dBm improvement in IIP3. Comparing to the previous techniques like: MDS and IMS, the improvement in the linearity aspect of the CC-LNA with is significant while it achieves a sufficient gain and noise performance of 16.7dB and 1.26db, respectively. Besides, the NF-IMS method presents a noise cancellation behavior as well. To increase the practical reliability of simulation, the real element model from TSMC 65nm CRN65GP library is applied. The CC-LNA that employed NF-IMS method is an excellent match with the market demands in WBAN’s gateway applications.

CMOS Low Noise Amplifiers for Wireless Body Area Networks Applications: Techniques and Designs

2021 ◽  
Author(s):  
Mohammad Rezvani
Keyword(s):  
Low Power ◽  
Negative Feedback ◽  
Communication Systems ◽  
Noise Figure ◽  
Impedance Matching ◽  
Body Area Networks ◽  
Wireless Body Area Networks ◽  
Low Noise ◽  
Body Area ◽  
Wide Range

Recently, the growing advances in communication systems has led to urgent demand for low power, low cost, and highly integrated circuit topologies for transceiver designs, as key components of nearly every wireless application. Regarding to the usually weak input signal of such systems, the primary purpose of the wireless transceivers is consequently amplifying the signal without adding additional noise as much as possible. As a result, the performance of the low noise amplifier (LNA), measured in terms of features like gain, noise figure, dynamic range, return loss and stability, can highly determine the system’s achievement. Along with the evolution in wireless technologies, people get closer to the global seamless communication, which means people can unlimitedly communicates with each other under any circumstances. This achievement, as a result, paves the way for realizing wireless body area network (WBAN), the required applications for wireless sensor network, healthcare technology, and continuous health monitoring. This thesis suggests a number of LNA designs that can meet a wide range of requirements viz gain, noise figure, impedance matching, and power dissipation at 2.4Ghz frequency based on 0.13μm and 65nm CMOS technologies. This dissertation focused on the low power, high gain, CMOS reused current (CICR) LNA with noise optimization for on-body wireless body area networks (WBAN). A new design methodology is introduced for optimization of the LNA to attain gain and noise match concurrently. The designed LNA achieves a 28.5 dB gain, 2.4 dB noise figure, -18 dB impedance matching, while dissipating 1mW from a 1.2V power supply at 2.4 GHz frequency which is intended for WBAN applications. The tests and simulations of LNA are utilized in Cadence IC6.15 with IBM 130nm CMRF-8-SF library. The provided CICR LNA results inclusively prove the advantages of our design over other recorded structures. In the second step, a new linearization method is proposed based on Cascade LNA structure (CC-LNA). The proposed negative feedback intermodulation sink (NF-IMS) method benefits from the feedback to improve the linearity of CC-LNA. It proves that the additional negative feedback enhances the linearity of LNA despite the previous research. Furthermore, the heavily mathematical calculations of NF-IMS technique are carried on with the proposed modified Volterra series method. The NF-IMS method demonstrates more than 9.5dBm improvement in IIP3. Comparing to the previous techniques like: MDS and IMS, the improvement in the linearity aspect of the CC-LNA with is significant while it achieves a sufficient gain and noise performance of 16.7dB and 1.26db, respectively. Besides, the NF-IMS method presents a noise cancellation behavior as well. To increase the practical reliability of simulation, the real element model from TSMC 65nm CRN65GP library is applied. The CC-LNA that employed NF-IMS method is an excellent match with the market demands in WBAN’s gateway applications.

Design of low power SRAM- based ubiquitous sensor for wireless body area networks

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Kumar Neeraj ◽  
Mohammed Mahaboob Basha ◽  
Srinivasulu Gundala
Keyword(s):  
Health Care ◽  
Low Power ◽  
Soft Errors ◽  
Body Area Networks ◽  
Wireless Body Area Networks ◽  
Body Area ◽  
Temperature Instability ◽  
Content Type ◽  
Bias Temperature Instability ◽  
Sram Design

Purpose Smart ubiquitous sensors have been deployed in wireless body area networks to improve digital health-care services. As the requirement for computing power has drastically increased in recent years, the design of low power static RAM-based ubiquitous sensors is highly required for wireless body area networks. However, SRAM cells are increasingly susceptible to soft errors due to short supply voltage. The main purpose of this paper is to design a low power SRAM- based ubiquitous sensor for healthcare applications. Design/methodology/approach In this work, bias temperature instabilities are identified as significant issues in SRAM design. A level shifter circuit is proposed to get rid of soft errors and bias temperature instability problems. Findings Bias Temperature Instabilities are focused on in recent SRAM design for minimizing degradation. When compared to the existing SRAM design, the proposed FinFET-based SRAM obtains better results in terms of latency, power and static noise margin. Body area networks in biomedical applications demand low power ubiquitous sensors to improve battery life. The proposed low power SRAM-based ubiquitous sensors are found to be suitable for portable health-care devices. Originality/value In wireless body area networks, the design of low power SRAM-based ubiquitous sensors are highly essential. This design is power efficient and it overcomes the effect of bias temperature instability.

An Energy-Efficient Optimization Based Scheme for Low Power Devices in Wireless Body Area Networks

2019 ◽  
Vol 16 (7) ◽  
pp. 2934-2940 ◽  
Author(s):  
Dalal Abdulmohsin Hammood ◽  
Hasliza A. Rahim ◽  
Ahmed Alkhayyat ◽  
R. Badlishah Ahmad ◽  
M. Abdulmalek ◽  
...  
Keyword(s):  
Low Power ◽  
Energy Efficient ◽  
Body Area Networks ◽  
Wireless Body Area Networks ◽  
Power Devices ◽  
Body Area

scholarly journals A Novel Low-Power Time Synchronization Algorithm based on a Fractional Approach for Wireless Body Area Networks

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Giuseppe Coviello ◽  
Gianfranco Avitabile ◽  
Antonello Florio ◽  
Claudio Talarico ◽  
Janet Roveda
Keyword(s):  
Low Power ◽  
Time Synchronization ◽  
Body Area Networks ◽  
Wireless Body Area Networks ◽  
Body Area ◽  
Synchronization Algorithm

scholarly journals Power Saving MAC Protocols for Wireless Body Area Networks (WBANs)

2021 ◽  
Author(s):  
Kheesheshta Ramgoolam ◽  
Vandana Bassoo
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Mac Protocol ◽  
Body Area Networks ◽  
Wireless Body Area Networks ◽  
Mac Protocols ◽  
Body Area ◽  
Traffic Scenario ◽  
Low Traffic ◽  
Better Than

Abstract Two important criteria of Wireless Body Area Networks (WBANs) are low power consumption and delay. These criteria can be met by designing efficient Medium Access Control (MAC) protocols. In this paper, two TDMA-based MAC protocols are proposed. The first protocol, TM-MAC makes use of only a main radio. The second proposed protocol, TWM-MAC makes use of a WUR alongside the main radio. The two proposed protocols are compared with different categories of standard MAC protocols and it is shown that they outperform the standard ones by improving the power consumption and delay. The TWM-MAC consumes 55% less power consumption than the Scheduled Channel Polling MAC (SCP-MAC) protocol for a high traffic scenario on the high-rate platform while the TM-MAC consumes 85% less power consumption than the SCP-MAC. For a low traffic scenario, the TWM-MAC performs 53.5% better than the SCP-MAC protocol and 77.5% better than the Very Low Power MAC (VLPM) protocol on the high and low-rate platforms respectively. An improvement in delay was observed with the TWM-MAC protocol for high traffic situations. The TWM-MAC protocol surpasses the VLPM protocol by 81.1% in terms of latency for a high traffic scenario and 3.2% for a low traffic scenario.

A 1.8 to 4 GHz inductor-less highly linear CMOS LNA for wire-less receivers

2021 ◽  
pp. 11-20
Author(s):  
Nguyen Huu Tho
Keyword(s):  
Noise Figure ◽  
Impedance Matching ◽  
Wide Band ◽  
Low Noise ◽  
Common Source ◽  
Cmos Process ◽  
Wide Range ◽  
Active Feedback ◽  
Cmos Lna ◽  
Noise Amplifier

This paper presents an inductor-less wide-band highly linear low-noise amplifier (LNA) for wire-less receivers. The inductor-less LNA consists of a complementary current-reuse common source amplifier combined with a low-current active feedback to obtain wide range input impedance matching and low noise figure. In our LNA, a degeneration resistor is utilized to improve linearity of the LNA. Furthermore, we designed a bypass mode for the LNA to extend the range of its applications. The proposed LNA is implemented in 28 nm CMOS process. It has a gain of 14.9 dB and a bandwidth of 2.2 GHz. The noise figure (NF) is 1.95 dB and the third-order input intercept point (IIP3) is 24.8 dBm at 2.3 GHz. It consumes 17.2 mW at a 0.9-V supply and has an area of 0.011 mm2.

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