Journal ArticleDOI
The Path to the Software-Defined Radio Receiver
Reads0
Chats0
TLDR
The receiver's flexible analog baseband samples the channel of interest at zero IF, and is followed by clock-programmable downsampling with embedded filtering, giving a tunable selectivity that exceeds that of an RF prefilter, and a conversion rate that is low enough for A/D conversion at only milliwatts.Abstract:
After being the subject of speculation for many years, a software-defined radio receiver concept has emerged that is suitable for mobile handsets. A key step forward is the realization that in mobile handsets, it is enough to receive one channel with any bandwidth, situated in any band. Thus, the front-end can be tuned electronically. Taking a cue from a digital front-end, the receiver's flexible analog baseband samples the channel of interest at zero IF, and is followed by clock-programmable downsampling with embedded filtering. This gives a tunable selectivity that exceeds that of an RF prefilter, and a conversion rate that is low enough for A/D conversion at only milliwatts. The front-end consists of a wideband low noise amplifier and a mixer tunable by a wideband LO. A 90-nm CMOS prototype tunes 200 kHz to 20-MHz-wide channels located anywhere from 800 MHz to 6 GHzread more
Citations
More filters
Journal ArticleDOI
A Blocker-Tolerant, Noise-Cancelling Receiver Suitable for Wideband Wireless Applications
David Murphy,Hooman Darabi,Asad A. Abidi,Amr Amin Hafez,A. Mirzaei,Mohyee Mikhemar,Mau-Chung Frank Chang +6 more
TL;DR: A new wideband receiver architecture is proposed that employs two separate passive-mixer-based downconversion paths, which enables noise cancelling, but avoids voltage gain at blocker frequencies.
Proceedings ArticleDOI
A/D converter trends: Power dissipation, scaling and digitally assisted architectures
TL;DR: This paper summarizes recent trends in the area of low-power A/D conversion and a discussion on minimalistic and digitally assisted design approaches is used to sketch a route toward further improvements in ADC power efficiency and performance.
Journal ArticleDOI
Software Defined Radio: Challenges and Opportunities
TL;DR: Software Defined Radio may provide flexible, upgradeable and longer lifetime radio equipment for the military and for civilian wireless communications infrastructure and is also important as a convenient base technology for the future context-sensitive, adaptive and learning radio units referred to as cognitive radios.
Journal ArticleDOI
Multiuser detection in massive spatial modulation (SM-) MIMO with low-resolution ADCs
TL;DR: Simulation results show that MPDQD outperforms the linear detectors, works steadily under strong channel correlations, and even performs similarly as its counterpart in the un-quantized SM-MIMO.
Journal ArticleDOI
Analysis and Optimization of Direct-Conversion Receivers With 25% Duty-Cycle Current-Driven Passive Mixers
TL;DR: It is revealed that with an intelligent sizing of the design parameters, the 25%-duty-cycle-mixer-based receiver is superior in terms of linearity, noise, and elimination of IQ crosstalk.
References
More filters
Journal ArticleDOI
Analog-to-digital converter survey and analysis
TL;DR: The state-of-the-art of ADCs is surveyed, including experimental converters and commercially available parts, and the distribution of resolution versus sampling rate provides insight into ADC performance limitations.
Journal ArticleDOI
The software radio architecture
TL;DR: A closer look at the canonical functional partitioning of channel coding into antenna, RF, IF, baseband, and bitstream segments and a brief treatment of the economics and likely future directions of software radio technology are provided.
Book
Understanding digital signal processing
TL;DR: In this article, the author covers the essential mathematics by explaining the meaning and significance of the key DSP equations, and the book will help to achieve a thorough grasp of the basics and move gradually to more sophisticated DSP concepts and applications.
Journal ArticleDOI
Multirate Digital Signal Processing
TL;DR: Intended for a one-semester advanced graduate course in digitalsignal processing or as a reference for practicing engineers and researchers, this book is no longer being mass-produced.
Journal ArticleDOI
Phase Noise and Jitter in CMOS Ring Oscillators
TL;DR: Analysis shows that in differential ring oscillators, white noise in the differential pairs dominates the jitter and phase noise, whereas the phase noise due to flicker noise arises mainly from the tail current control circuit.