A Dual-Band CMOS MIMO Radio SoC for IEEE 802.11n Wireless LAN

Zargari, M.; Nathawad, L.Y.; Samavati, H.; Mehta, S.; Kheirkhahi, A.; Chen, P.; Gong, Ke; Vakili-Amini, B.; Hwang, J.; Chen, S.-W.M.; Terrovitis, Manolis; Kaczynski, B.; Limotyrakis, S.; Mack, M.; Gan, H.; Lee, MeeLan; Chang, R.T.; Doğan, Hakan; Abdollahi-Alibeik, S.; Baytekin, B.; Onodera, K.; Mendis, S.; Chang, Andrew; Rajavi, Yashar; Jen, S.H.; Su, D.K.; Wooley, B.A.

doi:10.1109/jssc.2008.2005742

Cited by 44 publications

(12 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Fig. 3 illustrates the architecture of a typical WiFi receiver (based on an Atheros 802.11 chip [15]). An incoming signal is first passed through the RF and analog circuit, amplified and converted from RF (e.g., 2.4 GHz) to the baseband by a mixer.…”

Section: Why Is Idle Listening So Costly?mentioning

confidence: 99%

E-MiLi: Energy-Minimizing Idle Listening in Wireless Networks

Zhang

Shin

2012

IEEE Trans. on Mobile Comput.

145

140

View full text Add to dashboard Cite

Abstract-WiFi interface is known to be a primary energy consumer in mobile devices, and idle listening (IL) is the dominant source of energy consumption in WiFi. Most existing protocols, such as the 802.11 power-saving mode (PSM), attempt to reduce the time spent in IL by sleep scheduling. However, through an extensive analysis of real-world traffic, we found more than 60 percent of energy is consumed in IL, even with PSM enabled. To remedy this problem, we propose Energy-Minimizing idle Listening (E-MiLi) that reduces the power consumption in IL, given that the time spent in IL has already been optimized by sleep scheduling. Observing that radio power consumption decreases proportionally to its clock rate, E-MiLi adaptively downclocks the radio during IL, and reverts to full clock rate when an incoming packet is detected or a packet has to be transmitted. E-MiLi incorporates sampling rate invariant detection, ensuring accurate packet detection and address filtering even when the receiver's sampling clock rate is much lower than the signal bandwidth. Further, it employs an opportunistic downclocking mechanism to optimize the efficiency of switching clock rate, based on a simple interface to existing MAC-layer scheduling protocols. We have implemented E-MiLi on the USRP software radio platform. Our experimental evaluation shows that E-MiLi can detect packets with close to 100 percent accuracy even with downclocking by a factor of 16. When integrated with 802.11, E-MiLi can reduce energy consumption by around 44 percent for 92 percent of users in real-world wireless networks.

show abstract

Section: Why Is Idle Listening So Costly?mentioning

confidence: 99%

E-MiLi: Energy-Minimizing Idle Listening in Wireless Networks

Zhang

Shin

2012

IEEE Trans. on Mobile Comput.

145

140

View full text Add to dashboard Cite

show abstract

“…Within the industry, substantial amount of work has been done to achieve more flexibility in HW separately in cellular and WLAN domains [5][6][7][8]. Despite of more flexible HW architectures, increased number of specified frequency bands combined with limited tunability of RF filters is shifting the complexity to even more parallel radio frequency processing.…”

Section: Rf Platformmentioning

confidence: 99%

A Reconfigurable Multi-standard Radio Platform

Immonen

Pärssinen

Zetterman

et al. 2012

Mobile Multimedia Communications

View full text Add to dashboard Cite

This paper presents a dynamically reconfigurable multi-radio RF architecture concept, which can be used for RF platform and control optimization. The platform realization is based on the RF hardware and its configuration mechanisms. The related control software is realized through functional separation of configuration management and timing control. Both key hardware and software elements are discussed and optimization opportunities evaluated using high-level analysis on key building blocks.

show abstract

“…It is also straightforward to adopt both architectures using the same configurable circuitry and adopt the optimum for each protocol as in some cellular multimode ASICs [9], [18]. Also dual-conversion without channel filtering at IF has been proven to be commercially viable solution for example in WLAN applications [19].…”

Section: A Receiver Architectures For Portable Devicesmentioning

confidence: 99%

A 900-MHz Direct Delta-Sigma Receiver in 65-nm CMOS

Koli

Kallioinen

Jussila

et al. 2010

IEEE J. Solid-State Circuits

View full text Add to dashboard Cite

Direct delta-sigma receiver architecture is introduced for wireless communication systems, such as LTE or WiMax. Architecture is based on direct downconversion, delta-sigma feedback that is up-converted to RF, and N-path filtering technique. Hence, the core receiver functions including channel selection filtering are embedded to a RF ADC with excellent linearity performance. This is achieved by transforming narrow-band filtering partially to RF injecting feedback into the input of the second amplifier stage, hence relieving requirements of the most critical subsequent stages. A 900-MHz direct delta-sigma receiver prototype occupies an active area of 1 2 mm 2 in 65-nm CMOS. The receiver for low-band cellular operations achieves NF of 2.3 and 6.2 dB in conventional and delta-sigma modes, respectively, and out-of-band IIP3 up to +4 dBm when the delta-sigma loop is active. The chip consumes 80 mW from a 1.2-V supply.

show abstract

A Dual-Band CMOS MIMO Radio SoC for IEEE 802.11n Wireless LAN

Cited by 44 publications

References 13 publications

E-MiLi: Energy-Minimizing Idle Listening in Wireless Networks

E-MiLi: Energy-Minimizing Idle Listening in Wireless Networks

A Reconfigurable Multi-standard Radio Platform

A 900-MHz Direct Delta-Sigma Receiver in 65-nm CMOS

Contact Info

Product

Resources

About