A 54&amp;#x2013;862 MHz CMOS direct conversion transceiver for IEEE 802.22 cognitive radio applications

Kim, Jongsik; Lee, Seung Jun; Kim, Seung-Soo; Ha, Jong Ok; Min, Jun‐Ki; Eo, Yun Seong; Shin, Hyunchol

doi:10.1109/cicc.2009.5280852

Cited by 8 publications

(5 citation statements)

References 4 publications

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“…In this brief, we present the design and implementation results of an active-RC LPF whose f H and f L are simultaneously programmable. Although the filter in this work is described for transmitter applications, the same approach can be adopted for a receiver filter design as demonstrated in one of the authors' recent works [11].…”

Section: Introductionmentioning

confidence: 91%

A CMOS Active-RC Low-Pass Filter With Simultaneously Tunable High- and Low-Cutoff Frequencies for IEEE 802.22 Applications

Shin

Kim

2010

IEEE Trans. Circuits Syst. II

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An active resistor-capacitor low-pass filter with simultaneously programmable high-end and low-end cutoff frequencies is presented for IEEE 802.22 cognitive radio transmitter applications. Transfer function analysis shows that the integrator frequency of a dc offset cancellation block should be tuned inversely proportional to the open-loop gain to maintain the low-end cutoff frequency at a constant value. Realized in a 0.18-μm complementary metal-oxide-semiconductor, the low-end cutoff frequency is successfully tuned between 740 Hz and 10 kHz over the 30-dB gain variation. Measured results show that the gain is tuned from −16.3 to +13.9 dB, and the high-end cutoff frequency is tuned from 2.1 to 6.04 MHz, while drawing 4.5 mA from a 1.8-V supply.Index Terms-Active resistor-capacitor (RC) filter, cognitive radio (CR), complementary metal-oxide-semiconductor (CMOS), IEEE 802.22, low-pass filter (LPF).

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Section: Introductionmentioning

confidence: 91%

A CMOS Active-RC Low-Pass Filter With Simultaneously Tunable High- and Low-Cutoff Frequencies for IEEE 802.22 Applications

Shin

Kim

2010

IEEE Trans. Circuits Syst. II

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“…The FCC initiative has been followed up by initiation of the development of an IEEE standard "Wireless Regional Area Networks" or IEEE 802.22 WRAN [14], which addresses the unlicensed usage of TV bands. Research studies on the implementation of transceivers for this kind of application exist [18,21] and on the potential adoption of Wi-Fi standards for these bands [17]. European Telecommunications Standards Institute (ETSI) is currently investigating the inclusion of socalled "Reconfigurable Radio Systems" (RRS) in their standards, but no actual standards have been proposed due to the complex nature of CR.…”

Section: Energy Efficient Spectrum Sensingmentioning

confidence: 99%

Adapting Cognitive Radio Technology for Low-Power Wireless Personal Area Network Devices

Rohde

Toftegaard

2011

Wireless Pers Commun

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The application of wireless personal area network (WPAN) and simple pointto-point wireless communication devices has increased drastically both in private household and in our workspaces in general over the last decade. Combined with the fact that the total number of wireless devices and associated standards present in the wireless environment is experiencing an extreme growth, the frequency spectrum scarcity is exposed as a severe challenge. Setting up efficient and reliable wireless WPAN links can be challenging even today. This is especially true because of the intensive use of the license-free frequency bands, where the level of interference can be extremely high. Combined with the challenges associated with multi-path propagation and attenuation, setting up and maintaining an acceptable level of perceived QoS is a challenging job even for trained professionals. This paper discusses the challenges associated with the implementation of highly reliable low-power WPAN networks for the future and the adaption of Cognitive Radio technology as a potential solution. A brief status on the maturity of CR technology will be presented as an integral part of this discussion.

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“…Lately, the working team of IEEE 802.22 engineers are enhancing and extending a standard for CR systems. Initially, they were set to range from 54 to 862 MHz (the frequency range for global television), but with the advancement of technology, the frequency range has expanded to include tens of MHz to several GHz 4–6 . Consequently, this efficiency enhancement can be accomplished through the implementation of wideband transmitters/receivers.…”

Section: Introductionmentioning

confidence: 99%

“…Initially, they were set to range from 54 to 862 MHz (the frequency range for global television), but with the advancement of technology, the frequency range has expanded to include tens of MHz to several GHz. [4][5][6] Consequently, this efficiency enhancement can be accomplished through the implementation of wideband transmitters/receivers. Equipping the transceiver with wideband blocks reduces the physical size and improves the overall efficiency of the structure.…”

Section: Introductionmentioning

confidence: 99%

A low‐power wideband LNA exploiting current‐reuse and noise cancelation techniques

Khanehbeygi

Jafarnejad

Koozehkanani

et al. 2022

Circuit Theory & Apps

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This paper presents an inductorless low-power wideband Low Noise Amplifier (LNA) in TSMC 0.18 μm CMOS technology. The proposed LNA is based on the Common-Gate (CG) topology, which consists of three consecutive stages: CG, Common-Source (CS), and Collector stage. The CG and CS configurations are responsible for providing the wideband input impedance matching and the majority of the gain, respectively. The overall performance of the LNA has been improved by applying noise cancelation, capacitive-peaking, and current reuse techniques. Unlike the conventional structure, the CG and CS sections' noise is canceled by utilizing a novel noise-canceling mechanism, simultaneously. Furthermore, with the capacitive-peaking technique, the voltage gain drop across hi gher frequencies is prevented, and thus, the bandwidth of the structure is improved. The trade-off between power consumption and input impedance has been dramatically resolved by employing the current reuse technique in the CG stage. Post-layout simulation results of the presented noise-canceling LNA demonstrate a Noise Figure (NF) of 2.19-2.58 dB and a maximum voltage gain of 19.84 dB with a À3 dB bandwidth of 0.2-2.85GHz. The simulated input/output matching (i.e., S11/S22) is better than À14.73/À19.43 dB in the entire bandwidth. Additionally, Input Third Intercept Point (IIP3) of À4.56 dBm is achieved. The results are gained by consuming only 2.87 mW under a supply voltage of 1.2 V and occupying a 0.0429 mm 2 of die area.

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A 54–862 MHz CMOS direct conversion transceiver for IEEE 802.22 cognitive radio applications

Cited by 8 publications

References 4 publications

A CMOS Active-RC Low-Pass Filter With Simultaneously Tunable High- and Low-Cutoff Frequencies for IEEE 802.22 Applications

A CMOS Active-RC Low-Pass Filter With Simultaneously Tunable High- and Low-Cutoff Frequencies for IEEE 802.22 Applications

Adapting Cognitive Radio Technology for Low-Power Wireless Personal Area Network Devices

A low‐power wideband LNA exploiting current‐reuse and noise cancelation techniques

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